WO2004107003A1 - Module d'emission-reception optique - Google Patents

Module d'emission-reception optique Download PDF

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Publication number
WO2004107003A1
WO2004107003A1 PCT/JP2004/008007 JP2004008007W WO2004107003A1 WO 2004107003 A1 WO2004107003 A1 WO 2004107003A1 JP 2004008007 W JP2004008007 W JP 2004008007W WO 2004107003 A1 WO2004107003 A1 WO 2004107003A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission
reception
optical
light
filter
Prior art date
Application number
PCT/JP2004/008007
Other languages
English (en)
Japanese (ja)
Inventor
Takeshi Okada
Hiromi Nakanishi
Yoshiki Kuhara
Original Assignee
Sumitomo Electric Industries, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries, Ltd. filed Critical Sumitomo Electric Industries, Ltd.
Publication of WO2004107003A1 publication Critical patent/WO2004107003A1/fr

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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
    • 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
    • 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
    • G02B6/4246—Bidirectionally operating package structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0232—Optical elements or arrangements associated with the device
    • H01L31/02325—Optical elements or arrangements associated with the device the optical elements not being integrated nor being directly associated with the device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0225—Out-coupling of light
    • H01S5/02251—Out-coupling of light using optical fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping

Definitions

  • the present invention relates to an optical transceiver module having a transmission unit and a reception unit.
  • FIG. 4 is a cross-sectional view showing the optical transceiver module 101.
  • the optical transmission / reception module 101 ′ includes a transmission unit 102, a reception unit 103, a wavelength selection filter 104, and an optical fiber 105.
  • the reception light provided through the optical fiber 105 is reflected by the wavelength selection filter 104 and enters the reception unit 103.
  • the receiving unit 103 has a photodiode 103a, and converts received light into an electric signal.
  • the transmission section 102 has a semiconductor laser element 102a, and converts an electric signal into transmission light.
  • the transmission light is emitted from the transmission unit 102, passes through the wavelength selection filter 104, and enters the optical fiber 105.
  • optical transmitting and receiving module 101 When manufacturing such an optical transmitting and receiving module 101, it is necessary to adjust the optical axis of the semiconductor laser element 102a to match the optical axis of the optical fiber 105. . Therefore, by arranging the transmission section 102, the wavelength selection filter 104, and the optical fiber 105 side by side on the optical axis of the optical fiber 105, the semiconductor laser element 102a and the optical fiber The optical axis adjustment of 105 is relatively easy.
  • optical communication system has been adopted for a broadcast communication network such as a CATV network.
  • This optical communication system uses an optical fiber and an optical transmission / reception module.
  • To extend the transmission distance in an optical communication system it is necessary to further increase the receiving sensitivity of the optical transceiver module.
  • the optical transmitter / receiver module of the user terminal receive the received light with high sensitivity.
  • the reception light is reflected by the wavelength selection filter 104, and then enters the reception unit 103. Since the received light is transmitted over a long distance through the optical fiber 105, the polarization of the received light changes irregularly. Since the reflectance of the wavelength selection filter 104 has polarization dependence, the amount of reflection of the received light reflected by the wavelength selection filter 104 is not constant, and the intensity of the received light fluctuates. There are cases. Due to the fluctuation of the received light intensity, the receiving sensitivity of the optical transmitting / receiving module 1 ⁇ is suppressed. ' ⁇ '
  • the present invention has been made in view of such a problem, and it is an object of the present invention to provide an optical transmission / reception module capable of increasing reception sensitivity by suppressing fluctuations in reception light intensity. Aim.
  • an optical transmitting and receiving module includes: an optical transmission medium; a receiving unit that receives received light from the optical transmission medium; And a wavelength selection filter that transmits the received light and reflects the transmitted light.
  • a wavelength selection filter is provided between the optical transmission medium and the receiver on the optical axis of the optical transmission medium.
  • the wavelength selection filter and the reception unit are arranged so that the position is located, and the transmission unit is arranged so that the transmission light transmitted from the transmission unit is reflected by the wavelength selection filter and enters the optical transmission medium.
  • the receiving unit, the transmitting unit, the wavelength selecting filter, and the optical fiber are configured such that the receiving light passes through the wavelength selecting filter and the transmitting light is reflected by the wavelength selecting filter. Are located. Since the transmission characteristics of the wavelength selection filter have little dependence on the polarization direction, even if the polarization direction of the received light fluctuates irregularly, the amount of the received light transmitted through the wavelength selection filter hardly changes. Therefore, fluctuations in the intensity of the received light incident on the receiving unit can be suppressed, and the reception sensitivity to the received light can be increased.
  • the optical transmitting and receiving module is configured to receive, from the optical transmission medium, the first to m-th (m is an integer of 2 or more) reception light components having different wavelengths from each other.
  • the second to m-th wavelength selection filters for reception are provided between the optical transmission medium and the first reception unit.
  • the second to m-th reception wavelength selection filters, the first to n-th transmission wavelength selection filters, and the first reception unit are positioned so that the first to n-th transmission wavelength selection filters are located.
  • the second to m-th reception units are arranged so as to receive the second to m-th reception light components reflected by the second to m-th reception wavelength selection filters, respectively.
  • the first to n-th transmission light components transmitted from the first to n-th transmission units are respectively reflected by the first to n-th transmission wavelength selection filters so as to enter the optical transmission medium.
  • n transmission units are arranged. [0 0 1 0]
  • the first received light component passes through the second to m-th reception wavelength selection filters and the first to ⁇ th transmission wavelength selection filters.
  • the first to ⁇ th transmission light components are reflected by the first to ⁇ th transmission wavelength selection filters, respectively, and the second to mth reception light components are respectively selected by the second to mth reception wavelength selection filters. It is configured to be reflected at the filter. Even if the polarization direction of the first received light component fluctuates irregularly, the amount of the received light transmitted through the second to m-th reception wavelength selection filters and the first to n-th transmission wavelength selection filters does not change. . Therefore, according to this optical transmission / reception module, it is possible to suppress the fluctuation of the light intensity of the first reception light component incident on the first reception unit, and to increase the reception sensitivity to the first reception light component. It becomes possible.
  • the wavelength of the transmission light is not less than 126 nm (nm) and not more than 130 nm (nm).
  • the wavelength of the received light is preferably within a range of not less than 480 nm (nm) and not more than 580 nm (nm).
  • the wavelengths of the first to n-th transmitted light components are respectively within a range from 126 nanometers (nm) to 138 nanometers (nm).
  • the wavelength of the received light component of m is within the range of not less than 148 nm (nm) and not more than 150 nm (nm), respectively, and the wavelength of the first received light component is 155 nm (Nm) or more and preferably not more than 158 nanometers (nm).
  • the optical transmitting / receiving module may include a transmitting unit (or a first to n-th transmitting units). This makes it possible to generate transmission light (or first to n-th transmission light components) in which the direction of polarization of the transmission unit (or the first to n-th transmission units) does not fluctuate irregularly. For this reason, each reflectance of the transmission light in the wavelength selection filter (or the first to n-th transmission wavelength selection filters) becomes constant without fluctuating, and the fluctuation of the transmission light intensity can be suppressed.
  • the optical transmission medium is an optical fiber.
  • the receiving unit has a photodiode.
  • FIG. 1 is a sectional view showing an optical transceiver module according to a first embodiment of the present invention.
  • FIG. 2A is a cross-sectional view illustrating a transmission unit.
  • FIG. 2B is a cross-sectional view illustrating the receiving unit.
  • FIG. 3 is a sectional view showing an optical transceiver module according to a second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing a conventional optical transceiver module.
  • FIG. 1 is a sectional view showing an optical transceiver module according to a first embodiment of the present invention.
  • the optical transmission / reception module 1 includes a transmission unit 2, a reception unit 3, a filter 4, a package 5, a ferrule 6, and an optical fiber 7.
  • the package 5 holds the transmission unit 2, the reception unit 3, the filter 4, and the optical fiber 7.
  • the package 5 has a side wall extending in the predetermined axis AX direction, and has a cylindrical shape.
  • the material of the package 5 is, for example, a metal such as stainless steel.
  • the package 5 may be made of a resin such as an epoxy resin.
  • the package 5 is provided with a first through hole 5a extending in a predetermined axis Ax direction. A ferrule 6 and an optical fiber 7 are inserted into one end of the first through hole 5a, and the receiving section 3 is fixed to the other end of the first through hole 5a.
  • the package 5 has a second through hole 5b.
  • the second through hole 5b is provided near the center of the package 5, and extends along an axis BX that forms a predetermined angle with respect to a predetermined axis AX direction.
  • the second through-hole 5b extends from the outer surface of the package _5
  • the package 5 penetrates the side wall of the package 5 toward the through hole 5a.
  • the second through-hole 5b extends in a direction orthogonal to the predetermined axis Ax direction.
  • the second through-hole 5b has a first end provided on the outer surface of the package 5 and a second end provided on the inner surface of the first through-hole 5a.
  • the transmitting section 2 is fixed to the first end of the second through hole 5b.
  • the optical fiber 7 is an optical transmission medium, and transmits signal light such as transmission light L1 and reception light L2.
  • the end of the optical fiber 7 is held by a cylindrical ferrule 6.
  • the ferrule 6 By inserting the ferrule 6 into one end of the first through hole 5 a, the end of the optical fiber 7 is positioned in the package 5.
  • the eye fiber 7 is fixed to the package 5 so that the optical axis direction of the optical fiber 7 is aligned with a predetermined axis AX direction in the package 5.
  • the transmission unit 2 has a function of transmitting the transmission light L1.
  • FIG. 2A is a cross-sectional view showing a transmission unit 2 such as a transmission subassembly.
  • the transmitting unit 2 has a so-called coaxial CAN package configuration, and includes a stem 21, a cap 22, a lens 23, a laser diode 24, a Ponole 25, A photodiode 26 and a lead pin 27 are provided.
  • the stem 21 is a disk-shaped member having a size of, for example, 5.6 mm (mm) in diameter.
  • a plurality of lead pins 27 are attached to the stem 21, and each of the lead pins 27 penetrates the stem 21 along an axis Cx intersecting in the thickness direction of the stem 21.
  • the pole 25 is fixed near the center of the main surface 21 a of the stem 21.
  • the pole 25 is a member for supporting the laser diode 24 and is formed in a column shape.
  • the wavelength of the t transmitting light L 1 which is a semiconductor light-emitting device such as Fabry-Perot type semiconductor laser or a DFB semiconductor laser for emitting a transmitted light L 1 is received, which will be described later Different from the wavelength of light L2.
  • the wavelength of the transmission light L1 is set within a range from 126 nanometers (nm) to 138 nanometers (nm).
  • the laser diode 24 is electrically connected to a part of the plurality of lead pins 27, and the transmitting section 2 receives an electrical transmission signal via the lead pin 27.
  • the laser diode 24 has, for example, a light-emitting surface 24a and a light-reflecting surface 24b facing each other, and the laser light resonating between the two surfaces is used as the light-emitting surface as transmission light L1. Emitted from 24a.
  • the photodiode 26 is a semiconductor light receiving element for monitoring the light intensity of the transmission light L1 emitted from the laser diode 24.
  • the light receiving surface of the photodiode 26 is optically coupled to the light reflecting surface 24 b of the laser diode 24.
  • the photodiode 26 is electrically connected to some of the lead pins 27 among the plurality of lead pins 27.
  • the photodiode 26 receives the light from the light reflecting surface 24 b and converts the intensity of the received light into an electric signal, which is provided to the outside of the transmitting unit 2 via the lead pin 27. .
  • the cap 22 is a member for covering the laser diode 24, the pole 25, and the photodiode 26.
  • the cap 22 has a cylindrical shape, and one end of the cap 22 is closed. The other end of the cap 22 contacts the main surface 2 l a ′ of the stem 21, and the cap 22 is fixed to the stem 21.
  • a lens 23 optically coupled to the light emitting surface 24 a of the laser diode 24, for example, a spherical lens is held.
  • the cap 22 is made of a metal material such as stainless steel, iron, and brass.
  • the laser diode 24 and the lens 23 are arranged along the axis Cx.
  • the transmission light L1 is emitted from the light emission surface 24a of the laser diode 24, and is collimated by the lens 23. The collimated light is provided to the outside of the transmission unit 2.
  • FIG. 2B is a sectional view showing a receiving unit 3 such as a receiving sub-assembly.
  • the receiving section 3 includes a stem 31, a cap 32, a lens 33, a photodiode 34, a submount 35, and a lead pin 37.
  • the stem 31, cap 32, lens 33, and lead bin 37 are connected to the stem 21, cap 22, lens 23, and lead pin 27 of the transmitter 2 shown in FIG. 2A. Since the same shape and configuration can be used, a detailed description thereof will be omitted.
  • the photodiode 34 is a semiconductor light receiving element for receiving the reception light L2.
  • a pin photodiode or an avalanche photodiode may be used.
  • Photodiode 3 4 Is electrically connected to the plurality of lead pins 37, generates an electrical reception signal according to the light intensity of the reception light L2, and receives the reception signal via the lead pin 37.
  • the submount 35 is a member for mounting the photodiode 34.
  • the submount 35 is fixed near the center of the main surface 3 la of the stem 31.
  • the photodiode 34 is mounted on the submount 35 so that its light receiving surface is optically coupled to the lens 33.
  • the photodiode 34 and the lens 33 are arranged along a predetermined axis DX.
  • the received light L 2 is collected by the lens 33 and enters the light receiving surface of the photodiode 34.
  • the wavelength of the received light L2 is different from the wavelength of the transmitted light L1, and in the present embodiment, for example, the photodiode 34 has a wavelength of at least 148 nm (nm) and at least 158 nm. Receives received light L2 within the range of meters (nm) or less.
  • the filter 4 is a wavelength selection filter having an optical spectrum that selectively transmits or reflects according to the wavelength of light.
  • the filter 4 has a film of several tens to about 100 layers formed on the surface of a substrate such as a glass plate or a polyimide plate.
  • the filter 4 reflects the wavelength component of the transmission light L1 and transmits the wavelength component of the reception light L2.
  • the filter 4 is arranged at a position corresponding to the second through-hole 5b in the first through-hole 5a, and at this position, the axis Ax intersects the axis BX.
  • the filter 4 is provided in the first through-hole 5a, and obliquely obstructs the first through-hole 5a with respect to the predetermined axis Ax direction. .
  • the filter 4 is provided so that the reflection angle of the transmission light L1 on the surface of the filter 4 is perpendicular to the incident angle.
  • the normal of the filter 4 is 4 with respect to the predetermined axis AX direction. At an angle of 5 degrees.
  • the optical transceiver module 1 performs the following operation. That is, when receiving the electric signal including the transmission data from the outside of the optical transmission / reception module 1, the transmission unit 2 generates the transmission light L1 according to the electric signal. Then, the transmission unit 2 emits the transmission light L1 to the second through hole 5b of the package 5. The transmission light L 1 is reflected by the filter 4 and provided to the outside of the optical transmission / reception module 1 via the optical fiber 7. On the other hand, when the optical transmission / reception module 1 receives the reception light L2 via the optical fiber 7, the reception light L2 passes through the filter 4 and enters the reception unit 3. The receiving unit 3 generates an electric signal according to the intensity of the received light L'2. The electric signal is provided outside the optical transceiver module 1.
  • the optical transmitting and receiving module 1 has the following effects. That is, the optical transmission / reception module 1 includes the transmission unit 2, the reception unit 3, the filter 4, the filter 4, and the optical fiber 7.
  • the transmitting unit 2 is arranged such that the received light L2 passes through the filter 4 toward the receiving unit 3, and the transmitted light L1 is reflected by the filter 4. Since the wavelength selection filter such as the filter 4 has a transmission characteristic with little dependence on the polarization direction, according to the optical transceiver module 1, even if the polarization direction of the received light L2 fluctuates irregularly, the light transmitted through the filter 4 Is hardly influenced by the transmission characteristics of the filter 4. Therefore, fluctuations in the light intensity of the reception light L2 incident on the reception unit 3 can be suppressed, and the reception sensitivity to the reception light L2 can be increased.
  • the wavelength of the transmission light L 1 is in the range of not less than 126 nanometers (nm) and not more than 138 nanometers (nm).
  • the wavelength of the received light L2 is in the range of not less than 148 nm (nm) and not more than 158 nm (nm).
  • an optical communication system called an optical subscriber system using an optical communication network, such as a cable television communication system, has been receiving attention.
  • This optical subscriber The system transmits video signals from the station-side communication device (hereinafter, referred to as the station device) to the subscriber-side communication device (hereinafter, referred to as the subscriber device), and also transmits video signals from the subscriber device to the station device. Can be transmitted.
  • analog signal light having a wavelength of 1.55 ⁇ m ( ⁇ ) is used as signal light for a video signal having a large amount of information (light to be received by the subscriber).
  • Digital signal light with a wavelength of 1.3 micrometers (/ im) may be used as signal light (transmission light from a subscriber) for a small number of upstream data signals.
  • the conventional optical transmission / reception module cannot receive analog signal light in the polarization direction. He was particularly sensitive to regular fluctuations. Therefore, there is a demand for an optical transceiver module that can receive analog signal light with higher reception sensitivity than digital signal light.
  • the wavelength within a wavelength range of 1.3 micrometer (/ im) band (not less than 126 nanometers (nm) and not more than 138 nanometers (nm)).
  • the optical subscriber transmits the transmitted light L 1 and the received light L 2 in the 1.55 ⁇ m (m) band (148 nm nanometer (nm) or more and 158 nm (nm) or less) wavelength range.
  • the subscriber unit can receive analog signal light with high reception sensitivity.
  • the optical transmitting and receiving module 1 includes the transmitting unit 21 and the laser diode 24.
  • the transmission light L1 is reflected by the filter 4. If the polarization direction of the transmission light L1 fluctuates irregularly, the reflection intensity of the transmission light L1 on the surface of the filter 4 fluctuates and does not become constant. As a result, the reflection light is provided outside the optical transceiver module 1.
  • the light intensity of the transmission light L 1 fluctuates.
  • the transmission unit 2 can generate the transmission light L1 having a certain polarization direction.
  • the transmitted light L 1 having a fixed polarization direction is reflected by the filter 4 with a constant reflectance, This makes it possible to suppress fluctuations in the light intensity of the transmission light L1.
  • FIG. 3 is a sectional view showing an optical transceiver module according to a second embodiment of the present invention.
  • the optical transmitting / receiving module 1a according to the present embodiment includes a first transmitting unit.
  • the package 8 includes a first transmitting unit 2a such as a first transmitting subassembly; a first receiving unit 3a such as a first receiving subassembly, and a second transmitting unit 2a such as a second receiving subassembly.
  • the receiving unit 3 b holds the first transmitting filter 11, the second receiving filter 12, and the optical fiber 10.
  • the package 8 has a side wall extending in a predetermined axis EX direction, and has a cylindrical shape.
  • the package 8 has a first through hole 8a.
  • the first through hole 8a extends in a predetermined axis EX direction so as to penetrate the package 8.
  • a ferrule 9 and an optical fiber 10 are inserted into one end of the first through hole 8a, and a first receiving section is inserted into the other end of the first through hole 8a.
  • the package 8 is provided with a second through hole 8b and a third through hole 8c.
  • Each of second through hole 8b and third through hole 8c extends from the outer surface of package 8 toward first through hole 8a, and penetrates the side wall of package 8.
  • the second through-hole 8b and the third through-hole 8c are provided side by side in a predetermined axis Ex direction, and each extend in a direction forming a predetermined angle with respect to the predetermined axis Ex direction. .
  • the second through-hole 8b and the third through-hole 8c extend along the axes Fx and Gx orthogonal to the predetermined axis EX direction, respectively.
  • the second through hole 8b has one end provided on the outer surface of the package 8 and the other end provided on the inner surface of the first through hole 8a.
  • a first transmission unit 2a is fixed to one end of b.
  • the third through hole 8c is connected to one end provided on the outer surface of the package 8 and the other end provided on the inner surface of the first through hole 8a.
  • the second receiving unit 3b is fixed to one end of the third through hole 8c.
  • the optical fiber 10 is an optical transmission medium, and includes a transmission light including a first transmission light wavelength component L3, a first reception light component L4, and a second reception light component L5. Transmit received light.
  • the end of the optical fiber 10 is held by a ferrule 9; the ferrule 9 is inserted into one end of the first through hole 8a to position the end of the optical fiber 10 in the package 8. You.
  • the optical fiber 10 is fixed to the package 8 so that the optical axis direction of the optical fiber 10 is aligned with a predetermined axis EX.
  • the first transmission unit 2a has a function of transmitting the first transmission light component L3. Since the shape and configuration of the first transmission unit 2a can be the same as the shape and configuration of the transmission unit 2 of the first embodiment, detailed description of the transmission unit 2a is omitted.
  • the first receiving unit 3a and the second receiving unit 3b receive the first received light component L4 and the second received light component L5 from the optical fiber 10, respectively. It has.
  • the shape and configuration of the first receiving unit 3a and the second receiving unit 3b are the same as the shape and configuration of the receiving unit 3 of the first embodiment except for the following points. That is, the wavelength of the first received light component L4 received by the first receiving unit 3a is in the range of 150 nm to 580 nm, and the second receiving unit 3b receives the wavelength.
  • the wavelength of the second received light component L5 is in the range from 148 nm to 150 nm.
  • the first transmission filter 11 is a first wavelength selection filter having a spectrum that selectively reflects the first transmission light component L3.
  • the second reception filter 12 is a second wavelength selection filter that selectively reflects the second reception light component L5.
  • the first transmission filter 11 is arranged at a position corresponding to the second through hole 8b within the first through hole 8a, and at this position, the axis EX intersects the axis FX.
  • the second receiving filter 12 is disposed at a position corresponding to the third through-hole 8c in the first through-hole 8a, and at this position, the axis Ex intersects the axis Gx. I have.
  • the first transmitting filter 11 and the second receiving filter 12 are provided so as to be inclined with respect to a predetermined axis EX direction so as to block the first through hole 8a. It has been.
  • the first transmission filter 11 is provided such that the reflection angle of the first transmission light component L3 on the surface of the filter 11 is perpendicular to the incident angle
  • the second reception filter 1 2 is provided such that the reflection angle of the second received light component L5 on the surface of the filter 12 is perpendicular to the incident angle.
  • the first transmission filter 11 and the second reception filter 12 are provided at an angle of 45 degrees with respect to the direction of the predetermined axis EX.
  • the first transmission filter 11 and the second reception filter 12 By providing the first transmission filter 11 and the second reception filter 12 in this manner, the first transmission light component L3 is reflected on the surface of the first transmission filter 11 While being incident on the fiber 10, the second received light component L5 is reflected on the surface of the second receiving filter 12 and is incident on the second receiving section 3b.
  • the optical transceiver module 1a performs the following operation. That is, when the first transmitting unit 2a receives an electric signal including transmission data from the outside of the optical transmitting / receiving module la, the first transmitting unit 2a generates a first transmitting light component L3 according to the electric signal. Then, the first transmission unit 2a emits the first transmission light component L3 to the second through hole 8b of the package 8. The first transmission light component L3 is reflected on the surface of the first transmission filter 11 and provided to the outside of the optical transmission / reception module 1a via the optical fiber 10.
  • the optical transmitting / receiving module 1a receives the first received light component L4 from the outside via the optical fiber 10
  • the first received light component L4 is converted to the first transmitting light component L4.
  • the light passes through the filter 11 and the second receiving filter 12 and enters the first receiving unit 3a.
  • the first receiving unit 3a provides an electric signal corresponding to the intensity of the first received light component L4 to the outside of the optical transceiver module 1a.
  • the optical transmitting and receiving module 1 a Upon receiving the light component L5, the second received light component L5 passes through the first transmitting filter 11 and is reflected by the second receiving filter 12 to be transmitted to the second receiving unit 3b.
  • the second receiver 3b provides an electric signal corresponding to the intensity of the second received light component L5 to the outside of the optical transceiver module 1a.
  • the optical transceiver module 1a has the following effects. That is, in the optical transmission / reception module 1a, the first reception light component L4 passes through the first transmission filter 11 and the second reception filter 12 and the first transmission light component L3 And the second received light component L5 is reflected by the second receiving filter 12. Even if the polarization direction of the first reception light component L4 fluctuates irregularly, the light intensity of the first reception light component L4 transmitted through the first transmission filter 11 and the second reception filter 12 Is hardly affected. Therefore, according to the optical transmitting and receiving module 1a, it is possible to suppress the fluctuation of the light intensity of the first received light component L4, and to improve the receiving sensitivity to the first received light component L4. Become. ,
  • the wavelength of the first transmitted light component L3 is 1260 nm (nm) or more and 1380 nm or more.
  • the wavelength of the second received light component L5 is in the range of 148.0 nanometers (nm) or more and 1500 nanometers (nm) or less
  • the wavelength of the first received light component L4 is Wavelength of more than 150 nm (nm) 1580 nm
  • the wavelength is 1.48 ⁇ m ( ⁇ ) band (1480 nm (nm) or more and 1500 nm
  • a downstream data signal may be sent from the central office to the subscriber unit using the digital signal light of (nm) or less.
  • the wavelength of the analog signal light for the video signal is 1.55 micrometers (//), excluding the 1.48 micrometers (Aim) band.
  • the wavelength range of the second received light component L5 received by the optical transmission / reception module 1a is 1.48 micrometers.
  • an optical subscriber system can be suitably realized. In other words, it becomes possible for the subscriber unit to receive the analog signal from the station unit with high sensitivity, and to perform digital two-way communication between the station unit and the subscriber unit.
  • the optical transceiver module 1a of the second embodiment transmits the first transmission light component L3 and receives the first reception light component L4 and the second reception light component L5. are doing.
  • the optical transmission / reception module of the modified example transmits transmission light including a plurality of transmission light components having different wavelengths in addition to the wavelength components, and receives a plurality of reception light components having different wavelengths in addition to the first reception light component. It can also be configured to: That is, the optical transmitting / receiving module transmits the first to n-th transmission light components and receives the first to m-th reception light components.
  • n is an integer of 1 or more
  • m is an integer of 2 or more.
  • the optical transmission / reception module includes first to m-th reception units (for example, first to m-th reception subassemblies), and second to m-th reception filters.
  • a first to an n-th transmission unit for example, a first to an n-th transmission subassembly
  • a first to an n-th transmission filter for example, a first to an n-th transmission filter
  • the second to m-th received light components from the optical fiber are preferably reflected by the second to m-th receiving filters and received by the second to m-th receiving units, respectively.
  • the first to n-th transmission light components transmitted from the first to n-th transmission units may be configured to be reflected by the first to n-th transmission filters and enter the optical fiber, respectively. .
  • a first receiving unit is arranged on the optical axis of the optical fiber, and first to n-th transmitting filters and second to m-th receiving filters are provided between the optical fiber and the first receiving unit. It is good to arrange.
  • the package 8 has a side wall extending along a predetermined axis, and has a cylindrical shape.
  • the second to m-th receiving units and the first to n-th transmitting units are arranged in order along a predetermined axis, and are fixed to a side wall of the package.
  • Optical fiber, The first to n-th transmission filters, the second to m-th reception filters, and the first reception unit are sequentially arranged along the predetermined axis.
  • the first reception light component passes through the first to n-th transmission filters and the second to m-th reception filters and passes through the first reception unit.
  • the first receiving unit can receive the first received light component with good sensitivity. Therefore, when the optical transmitting and receiving module receives a plurality of received light components, the first to n-th received light components that require high receiving sensitivity (for example, the above-described analog video signal) are used as the first received light components. It is preferable to transmit the transmission filter and the second to m-th reception filters.
  • the optical transceiver module of the present invention it is possible to increase the reception sensitivity by suppressing fluctuations in the intensity of received light.

Abstract

L'invention concerne un module d'émission-réception optique (1) comprenant une section d'émission (2), une section de réception (3), un filtre (4) et une fibre optique (7). La section de réception (3) est située sur l'axe optique de la fibre optique (7). Le filtre (4) est situé sur l'axe optique, entre la fibre optique (7) et la section de réception (3). La lumière reçue L2, transmise par la fibre optique (7), traverse le filtre (4) et est reçue par la section de réception (3). La lumière émise L1, émise par la section d'émission (2), est réfléchie par la surface du filtre (4) et entre dans la fibre optique (7). Dans le module d'émission-réception optique (1), l'intensité de la lumière qui a traversé le filtre (4) ne dépend pas de la direction de polarisation et la section de réception (3) reçoit la lumière qui a traversé le filtre (4). Ce module d'émission-réception optique (1) permet d'éliminer les variations d'intensité de la lumière reçue, même lorsque la direction de polarisation de la lumière reçue L2 est modifiée. Par conséquent, ce module d'émission-réception optique permet d'augmenter la sensibilité en réception.
PCT/JP2004/008007 2003-06-02 2004-06-02 Module d'emission-reception optique WO2004107003A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003156891A JP2004361502A (ja) 2003-06-02 2003-06-02 光送受信モジュール
JP2003-156891 2003-06-02

Publications (1)

Publication Number Publication Date
WO2004107003A1 true WO2004107003A1 (fr) 2004-12-09

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PCT/JP2004/008007 WO2004107003A1 (fr) 2003-06-02 2004-06-02 Module d'emission-reception optique

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JP (1) JP2004361502A (fr)
TW (1) TWI241082B (fr)
WO (1) WO2004107003A1 (fr)

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WO2016127376A1 (fr) * 2015-02-12 2016-08-18 Source Photonics (Chengdu) Co., Ltd. Lentille intégrée avec multiples structures et/ou surfaces optiques, module optique et émetteur-récepteur contenant celle-ci, et procédés de fabrication et d'utilisation de celle-ci

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TWI427824B (zh) * 2008-03-14 2014-02-21 Asahi Kasei Emd Corp 紅外線發光元件
JP5279847B2 (ja) * 2009-01-09 2013-09-04 三菱電機株式会社 光モジュール
TW201033665A (en) * 2009-03-04 2010-09-16 Apac Opto Electronics Inc Three-directional optical assembly
JP5793837B2 (ja) * 2010-07-26 2015-10-14 住友電気工業株式会社 光モジュール
US9008474B2 (en) 2009-11-11 2015-04-14 Sumitomo Electric Industries, Ltd. Optical module having focused optical coupling system for single fiber
WO2020010581A1 (fr) * 2018-07-12 2020-01-16 华为技术有限公司 Base, dispositif d'émetteur-récepteur optique, module optique et dispositif de communication
EP3800810A4 (fr) * 2018-08-27 2021-07-21 Huawei Technologies Co., Ltd. Composants d'émission-réception et de réception de lumière combinés, module optique combiné, dispositif de communication et système de réseau optique passif

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WO2016127376A1 (fr) * 2015-02-12 2016-08-18 Source Photonics (Chengdu) Co., Ltd. Lentille intégrée avec multiples structures et/ou surfaces optiques, module optique et émetteur-récepteur contenant celle-ci, et procédés de fabrication et d'utilisation de celle-ci
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JP2004361502A (ja) 2004-12-24
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