CA1270935A - Method and apparatus for delivering light from multiple light emitting diodes over a single optical fiber - Google Patents
Method and apparatus for delivering light from multiple light emitting diodes over a single optical fiberInfo
- Publication number
- CA1270935A CA1270935A CA000523192A CA523192A CA1270935A CA 1270935 A CA1270935 A CA 1270935A CA 000523192 A CA000523192 A CA 000523192A CA 523192 A CA523192 A CA 523192A CA 1270935 A CA1270935 A CA 1270935A
- Authority
- CA
- Canada
- Prior art keywords
- optical fiber
- substrate
- light
- emitting diodes
- light emitting
- 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 - Fee Related
Links
Classifications
-
- 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
-
- 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
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4212—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
-
- 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
- G02B6/4225—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements by a direct measurement of the degree of coupling, e.g. the amount of light power coupled to the fibre or the opto-electronic element
-
- 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
- G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
-
- 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
- G02B6/4236—Fixing or mounting methods of the aligned elements
- G02B6/4239—Adhesive bonding; Encapsulation with polymer material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Abstract
METHOD AND APPARATUS FOR DELIVERING LIGHT FROM MULTIPLE
LIGHT EMITTING DIODES OVER A SINGLE OPTICAL FIBER
ABSTRACT
A mutiple wavelength light source and a method of constructing a multiple wavelength light source. The light source includes a plurality of light emitting diodes mounted to a substrate, located closely adjacent to one another. A single optical fiber is mounted to the substrate, appropriately positioned to provide a desired ratio of wavelengths at a desired amplitude.
LIGHT EMITTING DIODES OVER A SINGLE OPTICAL FIBER
ABSTRACT
A mutiple wavelength light source and a method of constructing a multiple wavelength light source. The light source includes a plurality of light emitting diodes mounted to a substrate, located closely adjacent to one another. A single optical fiber is mounted to the substrate, appropriately positioned to provide a desired ratio of wavelengths at a desired amplitude.
Description
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METHOD AND APPARATUS FOR DELIVERING LIGHT FROM MULTIPLE
LIGHT EMITTIN~ DIODES OVER A SINGLE OPTICAL FIBER
BACKGROUND OF THE INVENTION
This invention pertains gen2rally to multiple 5 wavelength light sources, and in particular to fiber optic l~ght sources.
Typically, delivery of light of a plurality of wavelengths, derived from a plurality of light sources over a single optical fiber has been accomplished using l0 fiber optic mixers or combiners~ Using such mixers, individual optical fibers, each coupled to a separate light source, would be coupled to the input end of an optical mixer. Each fiber emerging from the output end of the optical mixer would include light from all input 15 fibers. Typical prior art mixing elements included mixers in which the fibers were fused to one another, for example as in U.S. Patent No. 4,305,641 issued to Witte and U.S.
Patent No. 4,410,346 issued to Aulich et al.
Alternatively, mixing has been accomplished by closely 20 aligned slits or openings in the cladding layer of optical fibers, as illustrated in U.S. Patent Nos. 4~355/863 and 4,407,668 also issued to Aulich et al. Alternatively, optical mixing has been accomplished by coupling input and output optical fibers to a wave guide, as illustrated in 25 U.S. Patent No. 3,~12,364 issued to Hudsen, U.S. Patent No. 4,213~670 issued to Milton et al, U.S. Patent No.
4,449,783 issued to Witte, and U.S. Patent No. 4,243,297 issued to ~lion.
SUMMARY OF THE INVENTION
The present invention provides an economical, simple, and efficient method of combining l1ght of different wavelengths, generated by a plurality of light emitting diodes. This method avoids the necessity of bulky and expen~ive optical mixers or ~ombiners~ and allows 35 fabrication of a multiple wavelength light source using a " . ~
; .:
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METHOD AND APPARATUS FOR DELIVERING LIGHT FROM MULTIPLE
LIGHT EMITTIN~ DIODES OVER A SINGLE OPTICAL FIBER
BACKGROUND OF THE INVENTION
This invention pertains gen2rally to multiple 5 wavelength light sources, and in particular to fiber optic l~ght sources.
Typically, delivery of light of a plurality of wavelengths, derived from a plurality of light sources over a single optical fiber has been accomplished using l0 fiber optic mixers or combiners~ Using such mixers, individual optical fibers, each coupled to a separate light source, would be coupled to the input end of an optical mixer. Each fiber emerging from the output end of the optical mixer would include light from all input 15 fibers. Typical prior art mixing elements included mixers in which the fibers were fused to one another, for example as in U.S. Patent No. 4,305,641 issued to Witte and U.S.
Patent No. 4,410,346 issued to Aulich et al.
Alternatively, mixing has been accomplished by closely 20 aligned slits or openings in the cladding layer of optical fibers, as illustrated in U.S. Patent Nos. 4~355/863 and 4,407,668 also issued to Aulich et al. Alternatively, optical mixing has been accomplished by coupling input and output optical fibers to a wave guide, as illustrated in 25 U.S. Patent No. 3,~12,364 issued to Hudsen, U.S. Patent No. 4,213~670 issued to Milton et al, U.S. Patent No.
4,449,783 issued to Witte, and U.S. Patent No. 4,243,297 issued to ~lion.
SUMMARY OF THE INVENTION
The present invention provides an economical, simple, and efficient method of combining l1ght of different wavelengths, generated by a plurality of light emitting diodes. This method avoids the necessity of bulky and expen~ive optical mixers or ~ombiners~ and allows 35 fabrication of a multiple wavelength light source using a " . ~
; .:
- : . ,, , - ,,,:;
:: - . ; ..
- . -:.. ,;: .: . ..
.
~ ' ' ' '; ' ' . , ,: ~
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2 66742-282 single optical fiber. In addition, this method provides an easy and effective method of accomplishing mixing of ligh~ genera~ed by the various LED sources in any desired ratlo.
The me~hod involves loca~ing light emit~ing diodes emitting the desired frequencies as closely adjacent one ano~her as is possible on an insula~ive substrate. A single optical fiber is thereafter placed in close proximity to the LEDs, perpendicular to the plane of the substrate, and its position is adjusted l~orizontally and vertically until the desired wavelength ratios ld and amplitudes are obtained, and the fiber is thereafter permanently fixed at that position. This method, and the multiple wavelength light source it produces is discussed in more detail below in conjunction with the following detailed description of the invention.
According to a broad aspect of the invention there is provided a method of fabrication of a multiple wavelength light source having desired wavelengths and wavelength ratios, comprising the steps of, selecting at least two light emitting diodes, each diode emitting light at one of said desired wavelengths;
attaching said at least two light emitting diodes to a common substrate adjacent to one another;
coupling said at least two light emitting diodes to a source of electrical energy to cause them to emit light at said desired wavelengths;
positioning an optical fiber having its first end over said energized light emitting diodes, wherein said second end of said optical fiber is coupled to monitoring equipment sensitive to .- ~ : ., :
2a light amplitude, and wherein said positioning step comprises positioning said first end of said optical fiber spaced from said light emitting diodes such that said desired wavelength ratio is emitted from said second end of said optical fiber; and attaching said first end optical fiber to said subs~rate a~
said appropriate location.
BRIEF nESCRIPTIO~ OF THE DRAWI~G5 Figure 1 illustrates a plan view of a substrate carrying t~o light emitting diodes, useful in the present invention.
Figure 2 illustrates a ceramic substrate carrying three LEDs.
Figure 3 illustrates a side plan view of the initial location of an optical flber relative to the substra~e illustrated in Figure 1.
Figure 4 illustrates a side sectional view of an optical iber~ permanently located and mounted to the substra~e of Figure 1.
Fi~ure 5 illustrates a side sectional view of an alternative embodiment of a multiple wavelength light source.
DETAILED DESCRIPTIO~ OF THE DRA~I~GS
Figure 1 illustrates a substrate and two LEDs for use in a two wavelen~th light source according to the present invention.
Substrate 10 may be a ceramic substrate ... . .. . . .
- : . ,...: .-- ...:
~. . '.. ,. :' ' " :~' carrying four metallized pads 12, 14, 24 and 26.
Metallized layers 12 and 14 ~ake the form of mounting padsl for mounting the LEDs 16 and 18. LEDs 16 and 18 are mounted in as close proximity to one another as is S possible. LEDs 16 and 18 are coupled to pads 26 and 24 by means of fine wires 20 and 22, respectively. Metallized layers 12, 14, 24 and 26 may conveniently ~erve as mounting poin~ for attachment of wire~ to couple to an electrical power source.
FIG. 2 illustrates a second substrate for use in a three wavelength light source. Substrate 30 is preferably a ceramic substrate, bearing metallized layers 32, 34, 36~
50, 52 and 54. Metallized layers, 32, 34, and 36 serve as mounting pad`s for LED~ 38, 40, and 42, which, again are 15 mounted as close to one another a~ i~ possible. LEDs 38, 40 and 42 are coupled to pads 50, 52 and 54, respectively, by fine wires 48, 46 and 44, respectively.
FIG. 3 shows a side view of an optical fiber 60 during positioning relative to the substrate illustrated ~0 in FIG. 1, above. LEDs 16 and 18 are coupled to an electriral energy source of the type intended to energize the L~Ds during normal use. Optical fiber 60 is held generally perpendicular to substrate 10 and spaced from LE~s 16 and 18 such that the fiber 60 accepts light from 25 both LEDs. The output end of optical fiber 60 should be coupled to monitoring equipment sen~itive to light inten~ity. By intermittently or alternately activating LEDs 16 and 18, the intensities of light ~enerated by the diodes can be compared. ~he ratio of inten~ity of the 30 desired frequencie~ can be adjusted by movement of the input end of optical fiber 60 parallel to substrate 10.
Overall intensity can be adjusted by vertical movement of optical fiber 60. When the de~ired inten~ities and ratios are obtained, optical fiber 60 should be permanently 35 mounted in place to ~ubstrate 10 by means of an optical - adhesive, such as a cyanoacrylate, or an ultravlolet curing epoxy.
~ , A
The me~hod involves loca~ing light emit~ing diodes emitting the desired frequencies as closely adjacent one ano~her as is possible on an insula~ive substrate. A single optical fiber is thereafter placed in close proximity to the LEDs, perpendicular to the plane of the substrate, and its position is adjusted l~orizontally and vertically until the desired wavelength ratios ld and amplitudes are obtained, and the fiber is thereafter permanently fixed at that position. This method, and the multiple wavelength light source it produces is discussed in more detail below in conjunction with the following detailed description of the invention.
According to a broad aspect of the invention there is provided a method of fabrication of a multiple wavelength light source having desired wavelengths and wavelength ratios, comprising the steps of, selecting at least two light emitting diodes, each diode emitting light at one of said desired wavelengths;
attaching said at least two light emitting diodes to a common substrate adjacent to one another;
coupling said at least two light emitting diodes to a source of electrical energy to cause them to emit light at said desired wavelengths;
positioning an optical fiber having its first end over said energized light emitting diodes, wherein said second end of said optical fiber is coupled to monitoring equipment sensitive to .- ~ : ., :
2a light amplitude, and wherein said positioning step comprises positioning said first end of said optical fiber spaced from said light emitting diodes such that said desired wavelength ratio is emitted from said second end of said optical fiber; and attaching said first end optical fiber to said subs~rate a~
said appropriate location.
BRIEF nESCRIPTIO~ OF THE DRAWI~G5 Figure 1 illustrates a plan view of a substrate carrying t~o light emitting diodes, useful in the present invention.
Figure 2 illustrates a ceramic substrate carrying three LEDs.
Figure 3 illustrates a side plan view of the initial location of an optical flber relative to the substra~e illustrated in Figure 1.
Figure 4 illustrates a side sectional view of an optical iber~ permanently located and mounted to the substra~e of Figure 1.
Fi~ure 5 illustrates a side sectional view of an alternative embodiment of a multiple wavelength light source.
DETAILED DESCRIPTIO~ OF THE DRA~I~GS
Figure 1 illustrates a substrate and two LEDs for use in a two wavelen~th light source according to the present invention.
Substrate 10 may be a ceramic substrate ... . .. . . .
- : . ,...: .-- ...:
~. . '.. ,. :' ' " :~' carrying four metallized pads 12, 14, 24 and 26.
Metallized layers 12 and 14 ~ake the form of mounting padsl for mounting the LEDs 16 and 18. LEDs 16 and 18 are mounted in as close proximity to one another as is S possible. LEDs 16 and 18 are coupled to pads 26 and 24 by means of fine wires 20 and 22, respectively. Metallized layers 12, 14, 24 and 26 may conveniently ~erve as mounting poin~ for attachment of wire~ to couple to an electrical power source.
FIG. 2 illustrates a second substrate for use in a three wavelength light source. Substrate 30 is preferably a ceramic substrate, bearing metallized layers 32, 34, 36~
50, 52 and 54. Metallized layers, 32, 34, and 36 serve as mounting pad`s for LED~ 38, 40, and 42, which, again are 15 mounted as close to one another a~ i~ possible. LEDs 38, 40 and 42 are coupled to pads 50, 52 and 54, respectively, by fine wires 48, 46 and 44, respectively.
FIG. 3 shows a side view of an optical fiber 60 during positioning relative to the substrate illustrated ~0 in FIG. 1, above. LEDs 16 and 18 are coupled to an electriral energy source of the type intended to energize the L~Ds during normal use. Optical fiber 60 is held generally perpendicular to substrate 10 and spaced from LE~s 16 and 18 such that the fiber 60 accepts light from 25 both LEDs. The output end of optical fiber 60 should be coupled to monitoring equipment sen~itive to light inten~ity. By intermittently or alternately activating LEDs 16 and 18, the intensities of light ~enerated by the diodes can be compared. ~he ratio of inten~ity of the 30 desired frequencie~ can be adjusted by movement of the input end of optical fiber 60 parallel to substrate 10.
Overall intensity can be adjusted by vertical movement of optical fiber 60. When the de~ired inten~ities and ratios are obtained, optical fiber 60 should be permanently 35 mounted in place to ~ubstrate 10 by means of an optical - adhesive, such as a cyanoacrylate, or an ultravlolet curing epoxy.
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FIG. 4 illustrates a side sectional view of the completed multiple wavelength light source. As illustrated, following attachment of optical fiber 60 to the substrate by means of transparent adhesive 62, the 5 assembly is potted in epoxy 64. Following this step, the assembly may be inserted in an outer, protective container.
FIG. S illustrates a side sectional view of an alternative embodiment of a multiple wavelength light 1d source manufactured according to the present invention.
In this embodiment, a light source having a detachable optical fiber is provided. In order to accomplish this method, the optical fiber is premounted in a coupling assembly comprising a threaded male coupling member 66~ a 15 correspondingly threaded female coupling member 68, and a fiber locating member 70 which is held in fixed position between coupling members 66 and 68 when these members are screwed together.
The method for manufacture of the light source ~0 parallels that described in connection with FIGs. 3 and 4 above except that the fiber and the associated coupling assembly are moved as a unit with respect to the substrate 10 until the desired light mix i5 achieved. The lower coupling member 66 may then conveniently be bonded to the 25 substrate 10 by means of fast curing UV cured expoxy cement. This assembly allows for removal of the optical iber 60, when necessary, and for substitution of replacement optical fibers without loss of the desired mix of light frequencies. Control of the intensity of the 30 light source is accomplished by con~rolling the distance between light emitting diodes 16 and 18 and the end oE
light fiber 60. Therefore, if it is desired to duplicate the light intensity in a replacement optical iber, it will be necessary to assure that the configuration of the 35 replacement optical fiber and its associated coupling members duplicates that of the` original.
: . , .
: ,. . :
: . ~
'~. ' ` ' , This method has the distinct advantage that it avoids the use of expensive and bulky optical combiners and the use of multiple optical fibers. A multiple wavelength light source constructed according to this method has been S found to have an efficiency comparable to a light source constructed in which a plurality of optical fibers are each coupled to an individual light emitting diode, and thereafter mixed in currently available optical mixers.
The loss of efficiency due to use of a single light flber 10 as an optical in~ut source appears to be roughly equivalent to the lost efficiency due to the use of an optical mixer or combiner.
The method of the present invention is believed to be a particularly valuable method for producing multiple 15 wavelength light sources for uses where C08t iS an important factor because it minimizes the number of components required. It provides a flexible manufacturing method which can produce any desired ratio of light, and a variety of intensity of outputR, using a single set of ~20 components. In addition, the manufacturing method produces light sources which are precalibrated, because this manufacturing method necessarily takes into account and compensates for variations in efficiencies of individual light emitting diodes and efficiencies of ~5 individual light fibers.
In connection with the above disclosure, we claim:
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, . . .
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'-:, ~, ~'" ' . - ': ' ' .
. ., '''.'. , '.' "' '
FIG. 4 illustrates a side sectional view of the completed multiple wavelength light source. As illustrated, following attachment of optical fiber 60 to the substrate by means of transparent adhesive 62, the 5 assembly is potted in epoxy 64. Following this step, the assembly may be inserted in an outer, protective container.
FIG. S illustrates a side sectional view of an alternative embodiment of a multiple wavelength light 1d source manufactured according to the present invention.
In this embodiment, a light source having a detachable optical fiber is provided. In order to accomplish this method, the optical fiber is premounted in a coupling assembly comprising a threaded male coupling member 66~ a 15 correspondingly threaded female coupling member 68, and a fiber locating member 70 which is held in fixed position between coupling members 66 and 68 when these members are screwed together.
The method for manufacture of the light source ~0 parallels that described in connection with FIGs. 3 and 4 above except that the fiber and the associated coupling assembly are moved as a unit with respect to the substrate 10 until the desired light mix i5 achieved. The lower coupling member 66 may then conveniently be bonded to the 25 substrate 10 by means of fast curing UV cured expoxy cement. This assembly allows for removal of the optical iber 60, when necessary, and for substitution of replacement optical fibers without loss of the desired mix of light frequencies. Control of the intensity of the 30 light source is accomplished by con~rolling the distance between light emitting diodes 16 and 18 and the end oE
light fiber 60. Therefore, if it is desired to duplicate the light intensity in a replacement optical iber, it will be necessary to assure that the configuration of the 35 replacement optical fiber and its associated coupling members duplicates that of the` original.
: . , .
: ,. . :
: . ~
'~. ' ` ' , This method has the distinct advantage that it avoids the use of expensive and bulky optical combiners and the use of multiple optical fibers. A multiple wavelength light source constructed according to this method has been S found to have an efficiency comparable to a light source constructed in which a plurality of optical fibers are each coupled to an individual light emitting diode, and thereafter mixed in currently available optical mixers.
The loss of efficiency due to use of a single light flber 10 as an optical in~ut source appears to be roughly equivalent to the lost efficiency due to the use of an optical mixer or combiner.
The method of the present invention is believed to be a particularly valuable method for producing multiple 15 wavelength light sources for uses where C08t iS an important factor because it minimizes the number of components required. It provides a flexible manufacturing method which can produce any desired ratio of light, and a variety of intensity of outputR, using a single set of ~20 components. In addition, the manufacturing method produces light sources which are precalibrated, because this manufacturing method necessarily takes into account and compensates for variations in efficiencies of individual light emitting diodes and efficiencies of ~5 individual light fibers.
In connection with the above disclosure, we claim:
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, . . .
`'., '' "~ ,'" . "' ,' " "
'-:, ~, ~'" ' . - ': ' ' .
. ., '''.'. , '.' "' '
Claims (5)
1. A method of fabrication of a multiple wavelength light source having desired wavelengths and wavelength ratios, comprising the steps of:
selecting at least two light emitting diodes, each diode emitting light at one of said desired wavelengths;
attaching said at least two light emitting diodes to a common substrate adjacent to one another;
coupling said at least two light emitting diodes to a source of electrical energy to cause them to emit light at said desired wavelengths;
positioning an optical fiber having its first end over said energized light emitting diodes, wherein said second end of said optical fiber is coupled to monitoring equipment sensitive to light amplitude, and wherein said positioning step comprises positioning said first end of said optical fiber spaced from said light emitting diodes such that said desired wavelength ratio is emitted from said second end of said optical fiber; and attaching said first end optical fiber to said substrate at said appropriate location.
selecting at least two light emitting diodes, each diode emitting light at one of said desired wavelengths;
attaching said at least two light emitting diodes to a common substrate adjacent to one another;
coupling said at least two light emitting diodes to a source of electrical energy to cause them to emit light at said desired wavelengths;
positioning an optical fiber having its first end over said energized light emitting diodes, wherein said second end of said optical fiber is coupled to monitoring equipment sensitive to light amplitude, and wherein said positioning step comprises positioning said first end of said optical fiber spaced from said light emitting diodes such that said desired wavelength ratio is emitted from said second end of said optical fiber; and attaching said first end optical fiber to said substrate at said appropriate location.
2. A method according to claim 1 wherein said step of attaching said optical fiber to said substrate comprises attaching said optical fiber to said substrate by means of a transparent adhesive.
3. A method according to claim 1 wherein said first end of said optical fiber is provided with first and second fitting members, said first fitting member attached to said optical fiber, said second fitting member removably attached to said first fitting member and wherein said step of attaching said fiber to said substrate comprises attaching said second fitting member to said substrate.
4. A method according to claim 1 or claim 2 or claim 3 wherein said positioning step comprises movement of said first end of said optical fiber parallel to said substrate in order to accomplish said desired wavelength ratio.
5. A method according to claim 4, wherein said positioning step comprises movement of said first end of said optical fiber parallel to said substrate in order to accomplish said desired wavelength ratio, said positioning step further comprising moving said first end of said optical fiber perpendicular to said substrate in order to adjust the amplitude of the light emitted at said second end of said optical fiber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/799,884 US4725128A (en) | 1985-11-20 | 1985-11-20 | Method for delivering light from multiple light emitting diodes over a single optical fiber |
| US799,884 | 1985-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1270935A true CA1270935A (en) | 1990-06-26 |
Family
ID=25177012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000523192A Expired - Fee Related CA1270935A (en) | 1985-11-20 | 1986-11-18 | Method and apparatus for delivering light from multiple light emitting diodes over a single optical fiber |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4725128A (en) |
| EP (1) | EP0223242B1 (en) |
| CA (1) | CA1270935A (en) |
| DE (1) | DE3685552T2 (en) |
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| JPH0685432B2 (en) * | 1985-03-18 | 1994-10-26 | 株式会社日立製作所 | Semiconductor device |
| US4845052A (en) * | 1986-02-07 | 1989-07-04 | Harris Corporation | Method of packaging a non-contact I/O signal transmission integrated circuit |
| JPH0629915B2 (en) * | 1987-01-29 | 1994-04-20 | インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション | Optical communication signal source package |
| US4770485A (en) * | 1987-05-05 | 1988-09-13 | Hughes Aircraft Company | Apparatus to launch separated mode groups into optical fibers |
| US4969702A (en) * | 1989-05-22 | 1990-11-13 | Tektronix, Inc. | Laser pigtail assembly and method of manufacture |
| US4970386A (en) * | 1989-06-22 | 1990-11-13 | Westinghouse Electric Corp. | Vertical FET high speed optical sensor |
| US5102625A (en) * | 1990-02-16 | 1992-04-07 | Boc Health Care, Inc. | Apparatus for monitoring a chemical concentration |
| JPH08122588A (en) * | 1994-10-27 | 1996-05-17 | Nec Corp | Semiconductor light reception module device and production of inner element in this module |
| US6515313B1 (en) | 1999-12-02 | 2003-02-04 | Cree Lighting Company | High efficiency light emitters with reduced polarization-induced charges |
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| US7102177B2 (en) * | 2003-08-26 | 2006-09-05 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Light-emitting diode incorporating gradient index element |
| DE202007014173U1 (en) | 2007-10-10 | 2007-12-06 | CCS Technology, Inc., Wilmington | Coupling device for coupling at least one optical waveguide to an optical component |
| US7802910B2 (en) * | 2008-01-29 | 2010-09-28 | Dymax Corporation | Light guide exposure device |
| WO2016157301A1 (en) | 2015-03-27 | 2016-10-06 | オリンパス株式会社 | Optical transmission module, image pickup device, and structure for optical transmission module |
| US20190129108A1 (en) | 2017-10-31 | 2019-05-02 | Versalume LLC | Modular Laser Connector Packaging System and Method |
| FR3081058B1 (en) * | 2018-05-09 | 2021-10-01 | Radiall Sa | OPTICAL ASSEMBLY FOR FIBER OPTIC COMMUNICATION MODULE, WITH PASSIVE ALIGNED OPTICAL COUPLING DEVICE |
| US10551542B1 (en) | 2018-12-11 | 2020-02-04 | Corning Incorporated | Light modules and devices incorporating light modules |
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| US3912364A (en) * | 1974-04-08 | 1975-10-14 | Corning Glass Works | Mixer for optical waveguide bundle |
| DE2744129A1 (en) * | 1977-09-30 | 1979-04-12 | Siemens Ag | CORE-COAT GLASS FIBER WITH LATERAL COUPLING AREA |
| US4407668A (en) * | 1977-09-30 | 1983-10-04 | Siemens Aktiengesellschaft | Apparatus and process for producing a cladded optical fiber having a longitudinal side coupling zone |
| US4213670A (en) * | 1977-10-06 | 1980-07-22 | The United States Of America As Represented By The Secretary Of The Navy | Planar fiber optic star and access coupler |
| GB2026235B (en) * | 1978-06-06 | 1982-07-21 | Nippon Electric Co | Light emitting diode mounting structure for optical fibre communications |
| DE2837682A1 (en) * | 1978-08-29 | 1980-03-13 | Siemens Ag | OPTICAL MIXER ELEMENT |
| US4186996A (en) * | 1978-09-22 | 1980-02-05 | Amp Incorporated | Optic adaptor junction |
| US4216486A (en) * | 1979-02-21 | 1980-08-05 | Honeywell Inc. | Light emitting and light detecting semiconductor device for interfacing with an optical fiber |
| USRE31255E (en) * | 1979-02-21 | 1983-05-24 | Honeywell Inc. | Light emitting and light detecting semiconductor device for interfacing with an optical fiber |
| US4329190A (en) * | 1979-06-06 | 1982-05-11 | Motorola, Inc. | Process for attaching optical fiber to semiconductor die |
| US4243297A (en) * | 1979-06-27 | 1981-01-06 | International Communications And Energy, Inc. | Optical wavelength division multiplexer mixer-splitter |
| DE3011059A1 (en) * | 1980-03-21 | 1981-10-01 | Siemens AG, 1000 Berlin und 8000 München | OPTICAL STAR COUPLER WITH PLANAR MIXING ELEMENT |
| US4374390A (en) * | 1980-09-10 | 1983-02-15 | Bell Telephone Laboratories, Incorporated | Dual-wavelength light-emitting diode |
| DE3035089A1 (en) * | 1980-09-17 | 1982-04-22 | Siemens AG, 1000 Berlin und 8000 München | METHOD FOR PRODUCING DISTRIBUTION AND MIXING ELEMENTS FOR OPTICAL MESSAGE TECHNOLOGY AND METHOD FOR PRODUCING A PREFORM REQUIRED FOR THE FIRST METHOD |
| US4653847A (en) * | 1981-02-23 | 1987-03-31 | Motorola, Inc. | Fiber optics semiconductor package |
| US4394061A (en) * | 1982-01-22 | 1983-07-19 | Gte Automatic Electric Incorporated | Apparatus for aligning an optical fiber in an LED package |
| US4585300A (en) * | 1983-04-27 | 1986-04-29 | Rca Corporation | Multi-emitter optical fiber device |
| US4691987A (en) * | 1983-07-08 | 1987-09-08 | Itek Graphix Corp. | Optical fiber cable producer and method of bonding optical fibers to light emitting diodes |
| NL8303251A (en) * | 1983-09-22 | 1985-04-16 | Philips Nv | METHOD FOR OPTICALLY CONNECTING A LIGHT GUIDE TO AN ELECTROOPTIC DEVICE |
| US4605942A (en) * | 1984-10-09 | 1986-08-12 | At&T Bell Laboratories | Multiple wavelength light emitting devices |
| GB8508280D0 (en) * | 1985-03-29 | 1985-05-09 | British Telecomm | Optical component mounting |
| CA1262304A (en) * | 1985-06-28 | 1989-10-17 | John Charles Goodwin | Laser-fiber positioner |
| US4678271A (en) * | 1986-03-26 | 1987-07-07 | Rca Corporation | Apparatus for aligning a fiber and a device |
-
1985
- 1985-11-20 US US06/799,884 patent/US4725128A/en not_active Expired - Fee Related
-
1986
- 1986-11-18 DE DE8686116021T patent/DE3685552T2/en not_active Expired - Fee Related
- 1986-11-18 EP EP86116021A patent/EP0223242B1/en not_active Expired - Lifetime
- 1986-11-18 CA CA000523192A patent/CA1270935A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3685552D1 (en) | 1992-07-09 |
| US4725128A (en) | 1988-02-16 |
| EP0223242A1 (en) | 1987-05-27 |
| DE3685552T2 (en) | 1993-01-07 |
| EP0223242B1 (en) | 1992-06-03 |
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