CA1229904A - Laser-fiber positioner - Google Patents
Laser-fiber positionerInfo
- Publication number
- CA1229904A CA1229904A CA000485873A CA485873A CA1229904A CA 1229904 A CA1229904 A CA 1229904A CA 000485873 A CA000485873 A CA 000485873A CA 485873 A CA485873 A CA 485873A CA 1229904 A CA1229904 A CA 1229904A
- Authority
- CA
- Canada
- Prior art keywords
- light
- axis
- laser
- fiber
- devices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/14—Control of position or direction using feedback using an analogue comparing device
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
- G02B6/4227—Active alignment methods, e.g. procedures and algorithms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
- G02B6/4226—Positioning means for moving the elements into alignment, e.g. alignment screws, deformation of the mount
Abstract
LASER-FIBER POSITIONER
Abstract of the Disclosure To position a light output device such as a laser diode relative to a light input device such as a waveguide so as to obtain maximum coupling of light, the waveguide end facing the laser is vibrated by mechanical means to modulate the coupled light. Light is detected from a remote end of the fiber and a corresponding electrical signal is generated. Positional information contained in the oscillatory component of the signal is decoded and applied to a positioning device which then reduces misalignment between the waveguide and laser. The positioning device continuously seeks the maximum coupling position. The technique finds particular application in positioning a waveguide in a laser package prior to and during anchoring.
- i -
Abstract of the Disclosure To position a light output device such as a laser diode relative to a light input device such as a waveguide so as to obtain maximum coupling of light, the waveguide end facing the laser is vibrated by mechanical means to modulate the coupled light. Light is detected from a remote end of the fiber and a corresponding electrical signal is generated. Positional information contained in the oscillatory component of the signal is decoded and applied to a positioning device which then reduces misalignment between the waveguide and laser. The positioning device continuously seeks the maximum coupling position. The technique finds particular application in positioning a waveguide in a laser package prior to and during anchoring.
- i -
Description
I
This invention relates to a method and apparatus for positioning a light output device such as a laser diode relative to a light input device such as the end surface of an optical wave guide so as to maximize light launched from the diode laser into the wave guide.
Conventionally in the assembly o-f laser diode packages, in order to achieve a maximum amount of light coupled into a fiber from a laser, micro positioners are used to manipulate the fiber manually in front of the losing junction. Light from a remote end of the fiber or fiber pigtail is detected and generates a DC level. The fiber is manipulated in front of the laser in a liquid epoxy or low melting point solder and when the DC level is at a maximum, the epoxy is allowed to cure or the low melting point solder is cooled to solidification.
The procedure is very time consuming and requires a long training period to acquire the necessary high degree of manual dexterity and coordination. A more rapid and accurate positioning method is proposed by the present invention.
According to the invention a light output device is ; positioned relative to a light input device to couple maximum light from the output device to the input device by initially positioning the devices so that generally light from the output device is directed at the input device. One of the devices is then vibrated in a first direction and light received by the input device is detected and used to generate an electrical signal. The amplitude of an oscillatory component of that electrical signal corresponding to the impressed vibration is detected. Also the phase relationship between that component and impressed vibration is detected. Based on the detected ~l~2~9,~
amplitude and phase relationship a force is applied to one of the devices to effect translational movement of the device in said First direction to minimize said amplitude.
In one embodiment of the invention, the light input device is an end surface of an optical wave guide such as a package pigtail fiber of a laser diode package and the light output device is a laser diode. Particularly for anchoring a fiber in a laser package, the laser diode it Fixed in position and an end portion of the wave guide is vibrated relative to a mass of liquid epoxy resin using a piezoelectric crystal. The piezoelectric crystal can also be used to effect said translational movement.
A pair of such piezoelectric devices can be used, the devices energizable to move the fiber end in orthogonal directions whereby to position the fiber end portion in a plane perpendicular to the fiber axis. The piezoelectric active surfaces can be connected to respective connecting rods, the rods fused together and having a remote holder portion positioned around the fiber end portion.
In order to distinguish oscillatory components in said orthogonal directions, the crystals of the two piezoelectric devices can be driven with different vibrational frequencies.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:-Figure 1 shows partly in perspective and partly in circuit schematic form, apparatus according to the invention;
Figure 2 shows in graphical form the variation in coupling efficiency between a laser diode and an optical wave guide resulting when the input end of the wave guide is vibrated, and ~Z;2~9~?~
Figure 3 shows the vibration and oscillatory component of detected light applied to a common time base.
Referring in detail to Figure 1, there is shown a laser diode 10, a pigtail fiber 12, and an optical detector 14. A
piezoelectric crystal 16, drives the fiber end 20 in the x-direction in response to an oscillatory signal at frequency fox from a generator 24 summed with a DC level 38 from a phase sensitive detector 28. Similarly a piezoelectric crystal 18 drives the fiber end in the y-direction in response to an oscillatory signal at a frequency fry lo from a generator 26 summed with a DC level 40 from a phase sensitive detector 30. The DC levels are derived by detecting variation in coupled light resulting from the impressed modulation at fox and fry and are maintained at levels which maximize the coupled light.
The invention -Finds particular application in the assembly of a laser diode package. In the package, the laser diode chip 10 is normally bonded to a heat sink. The pigtail fiber 12 passes through a hermetic seal in the wall of a package housing and an end portion 20 of the fiber rests over a pedestal the height of which is marginally lower than the height of the losing junction within the laser chip 10. An important step in the assembly of a laser diode package is the accurate positioning of the pigtail fiber end 20 to maximize light launched from the laser chip 10. Typically at a distance of several tens of microns from the laser emitting facet, the light coupling profile is as shown in Figure 2 and spreads over a diameter of 5 to 10 microns, the pigtail fiber itself typically having a core radius of 10 microns. To maximize light coupling from the ; laser chip 10, the fiber pigtail end portion 20 can be both tapered -~lZ2~9~L
and rendered bulb ended to provide a lens action. Even so, the most important consideration in maximizing light launched into the fiber 12 is in having the axis of the fiber end portion 20 accurately aligned with laser emitting spot 44.
In the method of the present invention, light coupled from laser 10 into the fiber near end 20 is detected at a remote end 21 by a PIN or avalanche photo diode 14 mounted to receive light from the pigtail fiber. A corresponding detector output is taken through an amplifier 42 to a signal analyzing circuit including the phase sensitive detectors 28, 30. The fiber end 20 is moved in a mass of liquid epoxy 45 by energizing piezoelectric crystals 16, 18. Crystals 16 and 18 produce x and y-direckional movement, respectively, where the fiber axis extends along the z-direction, the x and y movement being combined at a fork arrangement 48, Although details of the piezoelectric crystal mounting arrangement are not shown, it is understood that through the independent action of the crystals the fork 48 can be moved to any spot within a predetermined zone of the my plane.
Drive to the piezoelectric crystals 16, 18 is applied from drive generators 24, 26 which generate oscillatory signals at respective frequencies fox and foe The frequencies selected are not harmonically related. For effective operation of the phase sensitive detectors, Fox and fry are greater than 10 Ho and are separated by at least 10 Ho to allow easy discrimination. A first output signal from each drive generator is taken through a summing junction 50 to a drive amplifier 52 and then applied to its corresponding piezoelectric crystal.
~2;2~9~4 Second outputs from the drive generators 24, 26 are applied, following a delay D, as reference signals to respective phase sensitive detectors 28, 30. The reference signals permit the phase relationship between the applied vibration and the detected signal to be determined. If the signals are in phase then the fiber end 21 must be moved in one direction to increase coupling whereas if the signals are out of phase then the fiber end must be moved in the opposite direction.
The light coupling efficiency between the laser output facet and fiber as a function of misalignment in the x-direction is typically as shown in Figure 2. Ideally the fiber is positioned at a point C corresponding to the fiber and laser being accurately aligned at the x-direction. In fact, after initial positioning of the fiber end relative to the laser, the fiber is typically at a position 'A' or 'B' on one side or other of the optimal position 'C'. When the signal at frequency fox is applied to the piezoelectric crystal 16, the fiber end is oscillated as represented by arrow 54 and waveform 'i'.
At the detector 14, a corresponding electrical signal is generated having in addition to a DC component, an oscillatory component We, We or We depending on the median position of the fiber. For accurate alignment, the fiber should be in a position in which the amplitude of the oscillatory component is minimized as shown by waveform We. The waveforms are shown with a common time base in Figure 3 which also shows their phase relationship. The phase sensitive detector 28 is tuned to frequency fox and, dependent on the amplitude and phase difference between the input signal from the drive generator 24 and that From the detector 14, a DC control signal is generated which is I
summed with the AC drive from drive generator 24 at the summing junction 50. The control signal is used to effect x-direction translational movement of the active surface of piezoelectric crystal I and thereby the pigtail fiber end 20. As shown in Figure 3, it is S evident frown the amplitude of waveforms We and jib that movement of the fiber is required to provide effective alignment. Moreover i-t is clear from the phase relationship of lea and by relative -to waveform 'i' in which direction the fiber should be moved to effect alignment.
A corresponding adjustment is effected in the y-direction by vibrating the fiber end 20 at a different frequency fry and analyzing the fry oscillatory component of the detected signal to derive its amplitude and phase relationship to the impressed modulation.
As previously indicated, this method Finds particular application in fixing a fiber relative to a laser chip. In a particular implementation of that method, the fiber end portion 20 is held in a mass of epoxy resin with the fiber end surface itself clear of the epoxy mass to permit light to be coupled directly into -the fiber. The epoxy is cured once the x and y control loops have been ;; 20 energized to fix the fiber end portion in its most effective position. It has been found that as epoxy resin is cured, the fiber end portion 20 can be moved of the order of 1 micron merely as a result of the curing mechanism. With the dynamic method described, if there is some movement of the fiber during curing, a restorative force 25 is applied during the initial curing stage.
; although -the invention has been described in terms of a pigtail fiber 12 being fixed relative to a laser chip 10, the method . , . .
- ~lZZ~36~
can be used to precisely align other fiber optic input and output devices, Thus the method can be used in aligning fibers for coupling light at a connector or splice site. It will be appreciated that although in this particular embodiment the light input device is vibrated, in an alternative embodiment the light input device can be fixed and the light output device vibrated.
The arrangement described above uses the same piezoelectric device to effect both the applied vibration and the translational movement. It will be understood that different mechanisms may be used for these different tasks. For instance, the vibration can be applied tonically using a loudspeaker, and the piezoelectric devices used only to effect the restoring translational movement of the fiber A primary conceptual difference between the present invention and existing approaches to laser-fiber alignment is that existing techniques depend only on directly maximizing the amount of light coupled from the laser into the fiber. In contrast, the present invention operates by minimizing the derivative of the coupled light with respect to small spatial perturbations of the fiber. with conventional alignment techniques a gross mechanical motion of the fiber or laser is needed to determine by comparing old and new values of the coupled light whether or not the laser-fiber combination is aligned and, if not, in which direction the position of best alignment lies. Because of the derivative nature of this invention, directional and degree of alignment information are available instantaneously.
This can in turn allow simultaneous alignment in both the x and y-directions.
This invention relates to a method and apparatus for positioning a light output device such as a laser diode relative to a light input device such as the end surface of an optical wave guide so as to maximize light launched from the diode laser into the wave guide.
Conventionally in the assembly o-f laser diode packages, in order to achieve a maximum amount of light coupled into a fiber from a laser, micro positioners are used to manipulate the fiber manually in front of the losing junction. Light from a remote end of the fiber or fiber pigtail is detected and generates a DC level. The fiber is manipulated in front of the laser in a liquid epoxy or low melting point solder and when the DC level is at a maximum, the epoxy is allowed to cure or the low melting point solder is cooled to solidification.
The procedure is very time consuming and requires a long training period to acquire the necessary high degree of manual dexterity and coordination. A more rapid and accurate positioning method is proposed by the present invention.
According to the invention a light output device is ; positioned relative to a light input device to couple maximum light from the output device to the input device by initially positioning the devices so that generally light from the output device is directed at the input device. One of the devices is then vibrated in a first direction and light received by the input device is detected and used to generate an electrical signal. The amplitude of an oscillatory component of that electrical signal corresponding to the impressed vibration is detected. Also the phase relationship between that component and impressed vibration is detected. Based on the detected ~l~2~9,~
amplitude and phase relationship a force is applied to one of the devices to effect translational movement of the device in said First direction to minimize said amplitude.
In one embodiment of the invention, the light input device is an end surface of an optical wave guide such as a package pigtail fiber of a laser diode package and the light output device is a laser diode. Particularly for anchoring a fiber in a laser package, the laser diode it Fixed in position and an end portion of the wave guide is vibrated relative to a mass of liquid epoxy resin using a piezoelectric crystal. The piezoelectric crystal can also be used to effect said translational movement.
A pair of such piezoelectric devices can be used, the devices energizable to move the fiber end in orthogonal directions whereby to position the fiber end portion in a plane perpendicular to the fiber axis. The piezoelectric active surfaces can be connected to respective connecting rods, the rods fused together and having a remote holder portion positioned around the fiber end portion.
In order to distinguish oscillatory components in said orthogonal directions, the crystals of the two piezoelectric devices can be driven with different vibrational frequencies.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:-Figure 1 shows partly in perspective and partly in circuit schematic form, apparatus according to the invention;
Figure 2 shows in graphical form the variation in coupling efficiency between a laser diode and an optical wave guide resulting when the input end of the wave guide is vibrated, and ~Z;2~9~?~
Figure 3 shows the vibration and oscillatory component of detected light applied to a common time base.
Referring in detail to Figure 1, there is shown a laser diode 10, a pigtail fiber 12, and an optical detector 14. A
piezoelectric crystal 16, drives the fiber end 20 in the x-direction in response to an oscillatory signal at frequency fox from a generator 24 summed with a DC level 38 from a phase sensitive detector 28. Similarly a piezoelectric crystal 18 drives the fiber end in the y-direction in response to an oscillatory signal at a frequency fry lo from a generator 26 summed with a DC level 40 from a phase sensitive detector 30. The DC levels are derived by detecting variation in coupled light resulting from the impressed modulation at fox and fry and are maintained at levels which maximize the coupled light.
The invention -Finds particular application in the assembly of a laser diode package. In the package, the laser diode chip 10 is normally bonded to a heat sink. The pigtail fiber 12 passes through a hermetic seal in the wall of a package housing and an end portion 20 of the fiber rests over a pedestal the height of which is marginally lower than the height of the losing junction within the laser chip 10. An important step in the assembly of a laser diode package is the accurate positioning of the pigtail fiber end 20 to maximize light launched from the laser chip 10. Typically at a distance of several tens of microns from the laser emitting facet, the light coupling profile is as shown in Figure 2 and spreads over a diameter of 5 to 10 microns, the pigtail fiber itself typically having a core radius of 10 microns. To maximize light coupling from the ; laser chip 10, the fiber pigtail end portion 20 can be both tapered -~lZ2~9~L
and rendered bulb ended to provide a lens action. Even so, the most important consideration in maximizing light launched into the fiber 12 is in having the axis of the fiber end portion 20 accurately aligned with laser emitting spot 44.
In the method of the present invention, light coupled from laser 10 into the fiber near end 20 is detected at a remote end 21 by a PIN or avalanche photo diode 14 mounted to receive light from the pigtail fiber. A corresponding detector output is taken through an amplifier 42 to a signal analyzing circuit including the phase sensitive detectors 28, 30. The fiber end 20 is moved in a mass of liquid epoxy 45 by energizing piezoelectric crystals 16, 18. Crystals 16 and 18 produce x and y-direckional movement, respectively, where the fiber axis extends along the z-direction, the x and y movement being combined at a fork arrangement 48, Although details of the piezoelectric crystal mounting arrangement are not shown, it is understood that through the independent action of the crystals the fork 48 can be moved to any spot within a predetermined zone of the my plane.
Drive to the piezoelectric crystals 16, 18 is applied from drive generators 24, 26 which generate oscillatory signals at respective frequencies fox and foe The frequencies selected are not harmonically related. For effective operation of the phase sensitive detectors, Fox and fry are greater than 10 Ho and are separated by at least 10 Ho to allow easy discrimination. A first output signal from each drive generator is taken through a summing junction 50 to a drive amplifier 52 and then applied to its corresponding piezoelectric crystal.
~2;2~9~4 Second outputs from the drive generators 24, 26 are applied, following a delay D, as reference signals to respective phase sensitive detectors 28, 30. The reference signals permit the phase relationship between the applied vibration and the detected signal to be determined. If the signals are in phase then the fiber end 21 must be moved in one direction to increase coupling whereas if the signals are out of phase then the fiber end must be moved in the opposite direction.
The light coupling efficiency between the laser output facet and fiber as a function of misalignment in the x-direction is typically as shown in Figure 2. Ideally the fiber is positioned at a point C corresponding to the fiber and laser being accurately aligned at the x-direction. In fact, after initial positioning of the fiber end relative to the laser, the fiber is typically at a position 'A' or 'B' on one side or other of the optimal position 'C'. When the signal at frequency fox is applied to the piezoelectric crystal 16, the fiber end is oscillated as represented by arrow 54 and waveform 'i'.
At the detector 14, a corresponding electrical signal is generated having in addition to a DC component, an oscillatory component We, We or We depending on the median position of the fiber. For accurate alignment, the fiber should be in a position in which the amplitude of the oscillatory component is minimized as shown by waveform We. The waveforms are shown with a common time base in Figure 3 which also shows their phase relationship. The phase sensitive detector 28 is tuned to frequency fox and, dependent on the amplitude and phase difference between the input signal from the drive generator 24 and that From the detector 14, a DC control signal is generated which is I
summed with the AC drive from drive generator 24 at the summing junction 50. The control signal is used to effect x-direction translational movement of the active surface of piezoelectric crystal I and thereby the pigtail fiber end 20. As shown in Figure 3, it is S evident frown the amplitude of waveforms We and jib that movement of the fiber is required to provide effective alignment. Moreover i-t is clear from the phase relationship of lea and by relative -to waveform 'i' in which direction the fiber should be moved to effect alignment.
A corresponding adjustment is effected in the y-direction by vibrating the fiber end 20 at a different frequency fry and analyzing the fry oscillatory component of the detected signal to derive its amplitude and phase relationship to the impressed modulation.
As previously indicated, this method Finds particular application in fixing a fiber relative to a laser chip. In a particular implementation of that method, the fiber end portion 20 is held in a mass of epoxy resin with the fiber end surface itself clear of the epoxy mass to permit light to be coupled directly into -the fiber. The epoxy is cured once the x and y control loops have been ;; 20 energized to fix the fiber end portion in its most effective position. It has been found that as epoxy resin is cured, the fiber end portion 20 can be moved of the order of 1 micron merely as a result of the curing mechanism. With the dynamic method described, if there is some movement of the fiber during curing, a restorative force 25 is applied during the initial curing stage.
; although -the invention has been described in terms of a pigtail fiber 12 being fixed relative to a laser chip 10, the method . , . .
- ~lZZ~36~
can be used to precisely align other fiber optic input and output devices, Thus the method can be used in aligning fibers for coupling light at a connector or splice site. It will be appreciated that although in this particular embodiment the light input device is vibrated, in an alternative embodiment the light input device can be fixed and the light output device vibrated.
The arrangement described above uses the same piezoelectric device to effect both the applied vibration and the translational movement. It will be understood that different mechanisms may be used for these different tasks. For instance, the vibration can be applied tonically using a loudspeaker, and the piezoelectric devices used only to effect the restoring translational movement of the fiber A primary conceptual difference between the present invention and existing approaches to laser-fiber alignment is that existing techniques depend only on directly maximizing the amount of light coupled from the laser into the fiber. In contrast, the present invention operates by minimizing the derivative of the coupled light with respect to small spatial perturbations of the fiber. with conventional alignment techniques a gross mechanical motion of the fiber or laser is needed to determine by comparing old and new values of the coupled light whether or not the laser-fiber combination is aligned and, if not, in which direction the position of best alignment lies. Because of the derivative nature of this invention, directional and degree of alignment information are available instantaneously.
This can in turn allow simultaneous alignment in both the x and y-directions.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:-
1. A method of positioning a light output device relative to a light input device to obtain maximum light coupling between the devices, the method comprising positioning the devices so that generally light from the output device is directed at the input device, vibrating one of the devices at a frequency fx along a first axis, detecting light received by the input device, generating an electrical signal in response to the detected light, detecting both the amplitude of an oscillatory component of that electrical signal and the phase relationship between that component and the vibration applied to said one device, and applying a force to translationally move one of the devices along said first axis such as to reduce said amplitude.
2. A method as claimed in claim 1 in which the light output device is a laser diode and the light input device is a pigtail fiber, the pigtail fiber and the laser forming part of a laser diode package.
3. A method as claimed in claim 1 in which a piezoelectric crystal is used to effect both vibration and translational movement of said one device.
4. A method as claimed in claim 1 in which said first axis is an x-axis, the method further comprising vibrating said one device at a frequency fy along a y-axis perpendicular to said x-axis, detecting the amplitude of an oscillatory component at frequency fy in said electrical signal, detecting the phase relationship between said component at fy and the vibration applied to said one device at said frequency fy, and applying a force to effect translational movement of said one device along the y-axis.
5. A method as claimed in claim 4 in which a pair of piezoelectric devices are used, one to effect motion of said one device along the x-axis and the other to effect motion of said one device along the y-axis, the piezoelectric devices having respective active surfaces connected to a control arrangement whereby movement of said piezoelectric device active surfaces is combined at said one device.
6. Apparatus for positioning a light output device relative to a light input device to obtain maximum light coupling therebetween, the apparatus comprising means for vibrating one of the devices, a photodetector connected to the input device for detecting light received by the input device, means for generating an electrical signal in response to the detected light, a phase sensitive detector for detecting amplitude of an oscillatory component of the electrical signal and for detecting the phase difference between said oscillatory component and the vibration applied to said one device, and means for applying a force to translationally move one of the devices in a direction so as to reduce said amplitude.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000485873A CA1229904A (en) | 1985-06-28 | 1985-06-28 | Laser-fiber positioner |
| US06/752,983 US4720163A (en) | 1985-06-28 | 1985-07-08 | Laser-fiber positioner |
| GB8606041A GB2178194B (en) | 1985-06-28 | 1986-04-28 | Laser-fiber positioner |
| JP61119393A JPS625210A (en) | 1985-06-28 | 1986-05-26 | Laser fiber positioning method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000485873A CA1229904A (en) | 1985-06-28 | 1985-06-28 | Laser-fiber positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1229904A true CA1229904A (en) | 1987-12-01 |
Family
ID=4130875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000485873A Expired CA1229904A (en) | 1985-06-28 | 1985-06-28 | Laser-fiber positioner |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4720163A (en) |
| JP (1) | JPS625210A (en) |
| CA (1) | CA1229904A (en) |
| GB (1) | GB2178194B (en) |
Families Citing this family (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4784454A (en) * | 1982-08-02 | 1988-11-15 | Andrew Corporation | Optical fiber and laser interface device |
| DE3244882A1 (en) * | 1982-12-03 | 1984-06-07 | Siemens AG, 1000 Berlin und 8000 München | TRANSMITTER OR RECEIVER WITH A DIODE HOLDED BY MEANS OF A CARRIER |
| FR2546311B1 (en) * | 1983-05-17 | 1986-03-28 | France Etat | METHOD AND DEVICE FOR CONNECTING BETWEEN AN OPTICAL FIBER AND AN INTEGRATED OPTICAL COMPONENT HAVING A WAVEGUIDE |
| US4850668A (en) * | 1987-03-17 | 1989-07-25 | Hosain Hakimi | Gyroptic visual couplers |
| US5222170A (en) * | 1987-04-03 | 1993-06-22 | Bt&D Technologies Ltd. | Optical fiber device fabrication |
| JPS63180809U (en) * | 1987-05-14 | 1988-11-22 | ||
| US4818049A (en) * | 1987-06-10 | 1989-04-04 | Allied-Signal Inc. | Method and apparatus for efficiently conveying light over a distance and effecting controlled illumination by projection thereof |
| US4917083A (en) * | 1988-03-04 | 1990-04-17 | Heraeus Lasersonics, Inc. | Delivery arrangement for a laser medical system |
| US4872173A (en) * | 1988-09-02 | 1989-10-03 | Northern Telecom Limited | Method and apparatus for stabilizing the spectral characteristics of a semiconductor laser diode |
| US4929041A (en) * | 1989-01-09 | 1990-05-29 | Johnston Pump/General Valve, Inc. | Cathodoluminescence system for use in a scanning electron microscope including means for controlling optical fiber aperture |
| JPH03257423A (en) * | 1990-03-08 | 1991-11-15 | Fujitsu Ltd | Operation point trimming method of waveguide type optical modulator |
| US5278934A (en) * | 1991-03-18 | 1994-01-11 | Newport Corporation | Throughput maximizing systems for substantially unimodal throughput profiles |
| US5535297A (en) * | 1993-12-16 | 1996-07-09 | Honeywell Inc. | Micro-alignment method |
| US5450508A (en) * | 1994-12-08 | 1995-09-12 | International Business Machines Corporation | Apparatus and method for optical fiber alignment using adaptive feedback control loop |
| EP0927375B1 (en) * | 1995-06-07 | 2002-02-20 | McDonnell Douglas Corporation | An alignment apparatus for precisely aligning an optical fiber and an associated fabrication method |
| US5606635A (en) * | 1995-06-07 | 1997-02-25 | Mcdonnell Douglas Corporation | Fiber optic connector having at least one microactuator for precisely aligning an optical fiber and an associated fabrication method |
| US5602955A (en) * | 1995-06-07 | 1997-02-11 | Mcdonnell Douglas Corporation | Microactuator for precisely aligning an optical fiber and an associated fabrication method |
| JPH0961752A (en) * | 1995-08-22 | 1997-03-07 | Sumitomo Electric Ind Ltd | Optical axis aligning method, optical axis aligning device, method for inspecting optical element, apparatus for inspecting optical element, production of optical module and apparatus for production of optical module |
| US5745624A (en) * | 1996-08-23 | 1998-04-28 | The Boeing Company | Automatic alignment and locking method and apparatus for fiber optic module manufacturing |
| US5852692A (en) * | 1997-05-16 | 1998-12-22 | Coherent, Inc. | Tapered optical fiber delivery system for laser diode |
| US6198580B1 (en) | 1998-08-17 | 2001-03-06 | Newport Corporation | Gimballed optical mount |
| US6164837A (en) * | 1998-12-30 | 2000-12-26 | Mcdonnell Douglas Corporation | Integrated microelectromechanical alignment and locking apparatus and method for fiber optic module manufacturing |
| US6516130B1 (en) | 1998-12-30 | 2003-02-04 | Newport Corporation | Clip that aligns a fiber optic cable with a laser diode within a fiber optic module |
| FR2790115B1 (en) | 1999-02-23 | 2001-05-04 | Micro Controle | METHOD AND DEVICE FOR MOVING A MOBILE ON AN ELASTICALLY MOUNTED BASE |
| US6996506B2 (en) * | 1999-02-23 | 2006-02-07 | Newport Corporation | Process and device for displacing a moveable unit on a base |
| US6511035B1 (en) | 1999-08-03 | 2003-01-28 | Newport Corporation | Active vibration isolation systems with nonlinear compensation to account for actuator saturation |
| US6325551B1 (en) | 1999-12-08 | 2001-12-04 | New Focus, Inc. | Method and apparatus for optically aligning optical fibers with optical devices |
| US6632029B1 (en) | 1999-12-22 | 2003-10-14 | New Focus, Inc. | Method & apparatus for packaging high frequency components |
| US6498892B1 (en) | 2000-08-03 | 2002-12-24 | Murray R. Harman | Positioning device especially for assembling optical components |
| US6892444B1 (en) * | 2000-09-21 | 2005-05-17 | Axsun Technologies, Inc. | Optical system manufacturing and alignment system |
| US6655840B2 (en) | 2001-02-13 | 2003-12-02 | Newport Corporation | Stiff cross roller bearing configuration |
| US20020131729A1 (en) * | 2001-02-16 | 2002-09-19 | Higgins Leo M. | Method and system for automated dynamic fiber optic alignment and assembly |
| US6546173B2 (en) * | 2001-02-20 | 2003-04-08 | Avanti Optics Corporation | Optical module |
| US20040212802A1 (en) * | 2001-02-20 | 2004-10-28 | Case Steven K. | Optical device with alignment compensation |
| US6590658B2 (en) | 2001-02-20 | 2003-07-08 | Cyberoptics Corporation | Optical alignment system |
| US6443631B1 (en) | 2001-02-20 | 2002-09-03 | Avanti Optics Corporation | Optical module with solder bond |
| US6956999B2 (en) | 2001-02-20 | 2005-10-18 | Cyberoptics Corporation | Optical device |
| US6546172B2 (en) * | 2001-02-20 | 2003-04-08 | Avanti Optics Corporation | Optical device |
| US6601524B2 (en) | 2001-03-28 | 2003-08-05 | Newport Corporation | Translation table with a spring biased dovetail bearing |
| US6791058B2 (en) | 2001-04-25 | 2004-09-14 | Newport Corporation | Automatic laser weld machine for assembling photonic components |
| US6568666B2 (en) | 2001-06-13 | 2003-05-27 | Newport Corporation | Method for providing high vertical damping to pneumatic isolators during large amplitude disturbances of isolated payload |
| US6619611B2 (en) | 2001-07-02 | 2003-09-16 | Newport Corporation | Pneumatic vibration isolator utilizing an elastomeric element for isolation and attenuation of horizontal vibration |
| US6556285B1 (en) | 2001-08-20 | 2003-04-29 | Glimmerglass Networks, Inc. | Method and apparatus for optical beam alignment detection and control |
| US6966535B2 (en) * | 2002-05-07 | 2005-11-22 | Newport Corporation | Snubber for pneumatically isolated platforms |
| CN1675572A (en) * | 2002-08-20 | 2005-09-28 | 赛博光学公司 | Optical alignment mount with height adjustment |
| US7114860B2 (en) * | 2002-12-17 | 2006-10-03 | Photintech, Inc. | Method and device for coupling a light emitting source to an optical waveguide |
| US7320455B2 (en) | 2003-10-24 | 2008-01-22 | Newport Corporation | Instrumented platform for vibration-sensitive equipment |
| US7236680B1 (en) * | 2004-08-16 | 2007-06-26 | Pi (Physik Instrumente) L.P. | Aligning apparatus and method using on-the-fly determination of throughput-profile gradient for current positioning of radiated influence supplier and/or receiver |
| US8231098B2 (en) * | 2004-12-07 | 2012-07-31 | Newport Corporation | Methods and devices for active vibration damping of an optical structure |
| JP5307439B2 (en) * | 2007-04-23 | 2013-10-02 | オリンパス株式会社 | Laser microscope |
| US9341774B2 (en) * | 2012-01-24 | 2016-05-17 | Applied Optoelectronics, Inc. | Optically matched laser array coupling assembly for coupling laser array to arrayed waveguide grating |
| US9631482B2 (en) | 2013-10-24 | 2017-04-25 | Saudi Arabian Oil Company | Method and apparatus for down-hole alignment of optic fibers |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394976A (en) * | 1963-05-31 | 1968-07-30 | Sperry Rand Corp | Frequency responsive apparatus |
| US3310978A (en) * | 1964-10-21 | 1967-03-28 | Alonza J Davis | Fiber optic vibration transducer and analyzer |
| US3442570A (en) * | 1966-03-02 | 1969-05-06 | Hughes Aircraft Co | Piezoelectric laser beam deflector |
| US4212513A (en) * | 1978-06-30 | 1980-07-15 | Sperry Corporation | Pulse transformer technique for optical switch |
| US4280756A (en) * | 1979-01-02 | 1981-07-28 | Itek Corporation | Piezoelectric bi-morph mirror actuator |
| JPS56156811A (en) * | 1980-05-09 | 1981-12-03 | Fujitsu Ltd | Coupling device |
| DE3031354A1 (en) * | 1980-08-20 | 1982-04-08 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTROMAGNETIC ARRANGEMENT |
| US4384230A (en) * | 1980-11-06 | 1983-05-17 | United Technologies Corporation | Digital piezoelectric actuator |
| US4394061A (en) * | 1982-01-22 | 1983-07-19 | Gte Automatic Electric Incorporated | Apparatus for aligning an optical fiber in an LED package |
| CA1247845A (en) * | 1983-06-24 | 1989-01-03 | Thomas Edye | Wave-guide alignment process |
| JPS606843A (en) * | 1983-06-24 | 1985-01-14 | Nippon Telegr & Teleph Corp <Ntt> | Measuring method of fine shaft shift |
| US4565940A (en) * | 1984-08-14 | 1986-01-21 | Massachusetts Institute Of Technology | Method and apparatus using a piezoelectric film for active control of vibrations |
-
1985
- 1985-06-28 CA CA000485873A patent/CA1229904A/en not_active Expired
- 1985-07-08 US US06/752,983 patent/US4720163A/en not_active Expired - Lifetime
-
1986
- 1986-04-28 GB GB8606041A patent/GB2178194B/en not_active Expired
- 1986-05-26 JP JP61119393A patent/JPS625210A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| GB2178194B (en) | 1989-10-25 |
| GB8606041D0 (en) | 1986-04-28 |
| JPS625210A (en) | 1987-01-12 |
| JPH0581004B2 (en) | 1993-11-11 |
| GB2178194A (en) | 1987-02-04 |
| US4720163A (en) | 1988-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1229904A (en) | Laser-fiber positioner | |
| US4679908A (en) | Laser-fiber positioning method | |
| US5574811A (en) | Method and apparatus for providing optical coupling between optical components | |
| US5007700A (en) | Edge-emitting diode-to-optical fiber coupling technique | |
| CA2357486A1 (en) | Integrated microelectromechanical alignment and locking apparatus and method for fiber optic module manufacturing | |
| JP2000111816A (en) | Active matching photonics assembly body | |
| Fischer | Opto-Electronic Packaging | |
| US10048450B2 (en) | Alignment of optical components using nanomagnets | |
| JPH05196831A (en) | Device for automatic alignment and method thereof | |
| EP0616694B1 (en) | Fiber optic polarization maintaining fused coupler fabricating apparatus | |
| GB2275566A (en) | Injection laser and photosensor assembly | |
| JPH0843676A (en) | Method for coupling optical fiber and optical waveguide module | |
| US6739763B2 (en) | Method for alignment of optical components | |
| US6556764B2 (en) | Apparatus and method for holding an optical fiber component during optical fiber alignment | |
| JPH1168243A (en) | Optical module and optical axis adjustment method | |
| US6882783B2 (en) | Method and apparatus for the alignment of optical components | |
| JP3045872B2 (en) | Method for aligning optical axis of optical waveguide and optical switch used in this method | |
| Paquet et al. | Edge coupling integrated optics packaging concept using liquid crystal element | |
| JPH0894887A (en) | Optical coupling parts and their production | |
| KR100334764B1 (en) | Apparatus for measuring refractive index profile of an optical fiber | |
| KR20090122239A (en) | Optical metrology system | |
| CN116482816A (en) | Connection method of optical fiber coupling structure | |
| JPH11248955A (en) | Optical waveguide, method for aligning lens and optical waveguide, device for aligning lens and optical waveguide, wireless optical communication equipment and recording medium | |
| JP2532484B2 (en) | Method and apparatus for assembling hybrid optical integrated circuit | |
| CN111580225A (en) | Mounting structure of optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |