WO2005078495A1 - 光送受信モジュール - Google Patents
光送受信モジュール Download PDFInfo
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- WO2005078495A1 WO2005078495A1 PCT/JP2005/002248 JP2005002248W WO2005078495A1 WO 2005078495 A1 WO2005078495 A1 WO 2005078495A1 JP 2005002248 W JP2005002248 W JP 2005002248W WO 2005078495 A1 WO2005078495 A1 WO 2005078495A1
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- Prior art keywords
- light
- optical
- photodiode
- groove
- lens
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- 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
Definitions
- the present invention relates to an optical transmission / reception module used for optical communication, optical information processing, and the like, for transmitting and receiving light.
- a wavelength division multiplexing optical transmission / reception module using optical signals in the 1.55 m band for the band and downstream has been developed.
- An example of such an optical transmission / reception module is disclosed in Japanese Patent Application Laid-Open No. H11-68705 (Patent Document 1).
- the optical transceiver module has a flat substrate, and an optical branching waveguide is formed on the flat substrate.
- a groove is provided at a branch portion of the optical branching waveguide, and a dielectric multilayer filter that branches input light in a transmission direction and a reflection direction according to a wavelength is provided in the groove.
- a transmitting laser diode and a receiving photodiode are provided on the flat substrate.
- the transmission wavelength of the dielectric multilayer filter is set to the receiving wavelength of the receiving photodiode
- the stop wavelength is set to the oscillation wavelength of the transmitting laser diode
- the transmitting laser diode and the receiving photodiode are separated by the dielectric multilayer film. If they are arranged at positions facing each other with a filter interposed therebetween, they will be stuffy.
- Patent Document 1 JP-A-11 68705
- a transmitting laser diode, a receiving photodiode, and a dielectric multilayer film are mounted on a substrate. Since it is necessary to provide a filter, space restrictions are increased. Alternatively, there has been a problem that, for example, a side-incidence type photodiode or the like must be used in order to provide no submount.
- the transmitting laser diode, the receiving photodiode, and the dielectric multilayer filter cannot be arranged on a straight line.
- the two-dimensional space constraint becomes larger. Therefore, for example, when these were arranged in an array, there was a problem in that the area of the planar substrate had to be very large.
- an object of the present invention is to provide an optical transmitting and receiving module that can reduce a space restriction that does not require a submount for providing a photodiode on a substrate.
- An optical transmitting and receiving module includes a light-transmitting substrate that transmits light of a first wavelength, and a second wavelength that is mounted on the light-transmitting substrate and that is different from the first wavelength.
- a light transmissive substrate is used as a substrate, and a photodiode is provided on the back side of the transparent substrate.
- Light emitted from the light input / output unit can be surely reached the photodiode by being reflected by the dielectric film filter placed in the inclined groove adjusted to a predetermined angle. Therefore, the light reflected by the dielectric film filter passes through the light transmitting substrate and enters the photodiode. Therefore, there is no need to separately provide a submount for providing a photodiode, and mounting errors can be reduced.
- the arrangement of elements on a light-transmitting substrate Since all the positions can be positioned by a semiconductor process, the position accuracy can be improved. Furthermore, since the photodiode is provided on the back surface side, the restriction on the space on the spectrally transparent substrate is eased.
- the light transmissive substrate is a silicon substrate.
- a silicon substrate having light-transmitting properties can be suitably used as the light-transmitting substrate.
- the inclined groove By forming the inclined groove by anisotropic etching in the light transmitting substrate, the inclined groove can be formed with high precision.
- a mode may be provided in which the photodiode is disposed immediately below a line connecting the laser diode and the light input / output unit.
- a plurality of sets of photodiodes, laser diodes, and dielectric film filters may be arranged to form an array.
- the photodiode is a line connecting the laser diode and the light incident portion.
- a mode can be adopted in which parallel lenses are provided between the dielectric film filter and the laser diode, and between the dielectric film filter and the light input / output unit.
- a converging lens for converging light to the photodiode on the surface of the light transmissive substrate may be provided.
- the provision of the condenser lens ensures that the light to the photodiode is condensed. Can be made.
- the converging lens force may be formed by ion beam etching.
- the condenser lens By forming the condenser lens by ion beam etching, the condenser lens can be formed with high positional accuracy.
- the light input / output unit may be a tip of an optical fiber, and the light input / output unit may be a tip of an optical waveguide.
- the light input / output section may be the tip of an optical fiber or the tip of an optical waveguide.
- an optical transmitting / receiving module that can reduce a space limitation that does not require a submount for providing a photodiode on a substrate.
- FIG. 1 is a perspective view of an optical transceiver module according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the optical transceiver module according to the first embodiment of the present invention.
- FIG. 3 is a perspective view of an optical transceiver module according to a second embodiment of the present invention.
- FIG. 4 is a view showing an optical transceiver module according to a third embodiment of the present invention, wherein (a) is a plan view and (b) is a side view.
- FIG. 5 is a side sectional view of an optical transceiver module according to a fourth embodiment of the present invention.
- FIG. 6 is a diagram showing an optical transceiver module according to a fifth embodiment of the present invention, where (a) is a plan view and (b) is a side sectional view.
- FIG. 1 is a perspective view of an optical transceiver module according to a first embodiment of the present invention
- FIG. 2 is a sectional view thereof.
- the optical transceiver module 1 is used for home use when performing optical communication by connecting a home and a base station with an optical fiber, for example.
- a light-transmitting substrate 10 is a silicon substrate, and transmits light of a wavelength of 1.55 / zm band used in downlink communication.
- a V-groove 11, a first lens groove 12, a filter groove 13 which is an inclined groove of the present invention, and a second lens groove 14 are formed on the surface of the light-transmitting substrate 10, and are respectively aligned on a straight line. Are located.
- the V-groove 11 is formed so as to extend from an edge of the light-transmitting substrate 10 in a direction perpendicular to the edge.
- the first lens groove 12 is formed such that the center point of the first lens groove 12 is located on an extension of the center line of the V groove 11.
- the filter groove 13 is formed on the extension line so that the center point of the filter groove 13 is located, and the second lens groove is located so that the center point of the second lens groove 14 is located on the extension line. 14 are formed.
- an end portion of an optical fiber 21 serving as a light input / output unit of the present invention is placed.
- the optical fiber 21 is mainly composed of quartz glass, and is placed in the V-groove 11 so that its center line coincides with the center line of the V-groove 11.
- the other end of the optical fiber 21 is connected to an optical transceiver module provided in a base station (not shown).
- the first ball lens 22 also has a spherical borosilicate glass force, and is placed in the first lens groove 12 so that the center of the first ball lens 22 is used for light entering and exiting from the tip of the optical fiber 21. It is located on the optical axis.
- the first ball lens 22 converts the light emitted from the optical fiber 21 into parallel light.
- the adhesive an epoxy-based or acrylic-based adhesive can be suitably used.
- a dielectric multilayer filter 23 which is a dielectric filter (wavelength multiplexer / demultiplexer) of the present invention, is mounted, and the dielectric multilayer filter 23 is bonded with an adhesive. It is adhered to the substrate 10.
- the dielectric multilayer filter 23 has wavelength selectivity, It transmits light of one wavelength, 1.3 m band wavelength in this embodiment, and reflects light of a second wavelength different from the first wavelength, 1.55 m band wavelength in this embodiment. Note that a dielectric film formed of a single-layer film can be used as the dielectric film filter.
- the second ball lens 24 is made of borosilicate glass like the first ball lens 22, and is placed in the second lens groove 14, so that the center of the second ball lens 24 is away from the optical fiber.
- the light enters and exits and is positioned on the optical axis of the light passing through the dielectric multilayer filter 23.
- a mount 15 is mounted on the surface of the light transmissive substrate 10, and a laser diode 25 is mounted on the mount 15.
- the optical fiber 21 and the laser diode 25 are provided at positions facing each other with the dielectric multilayer filter 23 interposed therebetween.
- the laser diode 25 emits light having a wavelength in the 1.3 m band.
- Light emitted from the laser diode 25 enters the optical fiber 21 via the second ball lens 24, the dielectric multilayer filter 23, and the first ball lens 22.
- the second ball lens 24 converts the light emitted from the laser diode 25 into parallel light.
- the V-groove 11, the first lens groove 12, the filter groove 13, and the second lens groove 14 on the surface of the light-transmitting substrate 10 are all formed at a predetermined angle and depth by anisotropic etching. Is formed. Specifically, an optical fiber 21, a first ball lens 22, a dielectric multilayer film filter 23, and a V-groove 11, a first lens groove 12, a filter groove 13, and a second lens groove 14, respectively. Only by dropping the second ball lens 24, the angle and the depth are such that the optical axes of the light passing through these elements coincide.
- a photodiode 26 is provided on the back surface of the light transmissive substrate 10.
- the photodiode 26 is a so-called back-illuminated photodiode, and its light detection surface is arranged so as to face the back surface of the light transmissive substrate 10.
- the photodiode 26 is disposed at a position where light having a wavelength of 1.55 / zm band, which is emitted from the optical fiber 21 and reflected by the dielectric multilayer filter 23, reaches.
- the photodiode 26 is located immediately below the line connecting the optical fiber 21 and the laser diode 25, in other words, the thickness of the light-transmitting substrate 10 including this line. It is arranged on the surface extending in the direction.
- the filter groove 13 in which the dielectric multilayer film filter 23 is placed is formed on the light-transmitting substrate 10 by adjusting the tilt angle and the force shown in FIG. Specifically, the tilt angle ⁇ is adjusted to an angle such that the light emitted from the optical fiber 21 is reflected by the dielectric multilayer filter 23, and the photodiode 26 is positioned at the point where the light is reflected. In the present embodiment, the inclination angle 0 is set to 54.7 degrees. Since the dielectric multilayer filter 23 is placed in the filter groove 13, the optical axes between the laser diode 25 and the optical fiber 21 and between the photodiode 26 and the optical fiber 21 are partially formed. Matches
- an amplifier 27 and a wiring substrate 28 are provided on the rear surface side of the light transmissive substrate 10 via pads (not shown). Among them, the amplifier 27 is disposed immediately below a line connecting the optical fiber 21 and the laser diode 25, similarly to the photodiode 26.
- the wiring board 28 is made of ceramic and is formed so as to cover almost the entire area of the rear surface of the light-transmitting substrate 10 except for the photodiode 26 and the amplifier 27! RU
- the photodiode 26 is connected via a bonding wire 29 to a metallization and a pattern MP provided on the amplifier 27 and the wiring board 28.
- the photodiode 26 receives the light on the photodetection surface and outputs a signal in which the optical power is converted into electricity, to the amplifier 27.
- the amplifier 27 amplifies the electric signal output from the photodiode 26 and outputs the amplified electric signal to the wiring board 28.
- Some metallization patterns MP on the wiring board 28 are connected to the laser diode 25 via the wiring CE penetrating the contact hole and the bonding wire 30.
- a convex lens 31 which is a condenser lens of the present invention is formed at a position on the surface of the light transmitting substrate 10 where light reflected from the dielectric multilayer filter 23 passes.
- the convex lens 31 condenses the light emitted from the optical fiber 21 and reflected by the dielectric multilayer filter 23 toward the light detection surface of the photodiode 26.
- the convex lens 31 is formed by ion beam etching.
- the optical transceiver module 1 having the above configuration will be described.
- light having a wavelength in the 1.3 / zm band is emitted from the laser diode 25 based on an electric signal from a drive circuit (not shown).
- the light emitted from the laser diode 25 is collimated by the second ball lens 24 and reaches the dielectric multilayer filter 23.
- the dielectric multilayer filter 23 light having a wavelength in the band 1 is transmitted, so that light emitted from the laser diode 25 reaches the first ball lens 22.
- the first ball lens 22 collects parallel light toward the tip of the optical fiber 21.
- the collected light having a wavelength in the 1.3 m band enters the optical fiber 21 and is transmitted as an optical signal to an optical transmitting / receiving module provided in a base station (not shown).
- an optical signal composed of light having a wavelength of 1.55 m is transmitted via the optical fiber 21 to the optical transmitting / receiving module 1 for home use.
- the light serving as the optical signal is emitted from the tip of the optical fiber 21.
- the light emitted from the tip end of the optical fiber 21 reaches the first ball lens 22.
- the light emitted from the optical fiber 21 is collimated by the first ball lens 22 and reaches the dielectric multilayer filter 23.
- the dielectric multilayer filter 23 reflects light having a wavelength in the 1.55 m band, so that light emitted from the optical fin 21 is reflected.
- the dielectric multilayer filter 23 is placed in the filter groove 13 formed with a predetermined inclination angle. For this reason, the light reflected by the dielectric multilayer filter 23 travels to the convex lens 31 formed on the light transmitting substrate 10 with high accuracy.
- the convex lens 31 collects the parallel light reflected by the dielectric multilayer filter 23. The collected light travels to the photodetection surface of the photodiode 26 with high accuracy.
- the photodiode 26 outputs a predetermined electric signal to the amplifier 27 by receiving the light condensed by the convex lens 31 on the light detection surface.
- the amplifier 27 amplifies the electric signal output from the photodiode 26 and outputs the amplified electric signal to the wiring board 28.
- the optical transmitting and receiving module 1 transmits and receives optical signals having different wavelengths.
- the power photodiode 26 having the laser diode 25 for emitting an optical signal and the photodiode 26 for receiving the optical signal is connected to the light transmitting substrate 10. It is provided on the back side. For this reason, the photo Since it is not necessary to separately provide a submount or the like for providing the diode 26, there is little space restriction. In addition, there is no need to use a side-illuminated photodiode or the like.
- the force of placing the dielectric multilayer filter 23 in the filter groove 13 The filter groove 13 is formed by anisotropic etching. Is formed. Therefore, since the filter groove 13 can be formed at an accurate inclination angle, light emitted from the optical fiber 21 can be guided to the photodiode 26 with high accuracy.
- the V-groove 11 on which the optical fiber 21 is mounted and the lens grooves 12 and 14 on which the ball lenses 22 and 24 are mounted are also anisotropically etched. It is formed to have a predetermined depth by ching. Therefore, it is possible to precisely position each element only by dropping each element such as the optical filter 21, the ball lenses 22, 24, and the dielectric multilayer filter 23 into these grooves.
- the convex lens 31 is directly formed on the surface of the light transmitting substrate 10 by ion beam etching. For this reason, it is not necessary to separately provide a condenser lens on the front surface or the back surface of the light transmissive substrate 10. Further, in the optical transceiver module 1 according to the present embodiment, the photodiode 26 is provided immediately below the line connecting the optical fiber 21 and the laser diode 25. For this reason, it is possible to alleviate the space limitation in the plane direction of the light transmissive substrate 10.
- the optical transceiver module according to the present embodiment is a so-called array in which a plurality of, in this embodiment, three optical fibers are arranged.
- FIG. 3 is a perspective view of the optical transceiver module according to the second embodiment of the present invention.
- the optical transmitting / receiving module 2 has a light transmitting substrate 40 made of a silicon substrate that transmits 1.55 m band light.
- a left V groove 11A similar to that of the first embodiment is formed on the surface of the light transmitting substrate 40, and a left optical fiber 21A is placed in the left V groove 11A.
- a left first lens groove 12A is formed on an extension of the left V groove 11A, and a filter groove 41 is formed on the extension of the left first lens groove 12A. Yes.
- the filter groove 41 is formed so as to extend in a direction orthogonal to the direction in which the left V-groove 11A extends.
- a left second lens groove 14A is formed on the extension of the left V-groove 11A beyond the filter groove 41.
- Each of these grooves 11A, 12A, 41, and 14A is adjusted to have a predetermined depth and angle by anisotropic etching.
- the left optical fiber 21A is placed in the left V-groove 11A, and the left first ball lens 22A is placed in the left first lens groove 12A. Further, a dielectric multilayer filter 42 is mounted in the filter groove 41, and a left second ball lens 24A is mounted in the left second lens groove 14A.
- a mount 43 is provided on the surface of the light-transmitting substrate 40 on an extension of the left V-groove 11A and at a position where the left second lens groove 14A is formed. .
- the mount 43 is formed so as to extend in a direction perpendicular to the direction in which the left V-groove 11A extends, and on the extension of the left V-groove 11A on the mount 43, the left A laser diode 25A is mounted.
- a left photodiode 26 A is mounted on the rear surface side of the light transmitting substrate 40.
- the left photodiode 26A is disposed immediately below a line connecting the left optical fiber 21A and the left laser diode 25A.
- a left amplifier 27A is provided at a position adjacent to the left photodiode 26A.
- the left amplifier 27A is also disposed immediately below a line connecting the left optical fiber 21A and the left laser diode 25A, similarly to the left photodiode 26A.
- the light transmissive substrate 40 is formed with a middle V groove 11B and a right V groove 11C similar to the left V groove 11A, and these three V grooves 11A, 11B, 11C are arranged at regular intervals in the edge direction of the light-transmitting substrate 40.
- a middle first lens groove 12B and a middle second lens groove 14B are formed on the extension of the middle V groove 11B.
- a right first lens groove 12C and a right second lens groove 14C are formed on the extension of the right V-groove 11C.
- the middle optical fiber 21B is placed in the middle V groove 11B, and the right optical fiber 21C is placed in the right V groove 11C.
- Middle first ball lens 22B is placed in the middle first lens groove 12B.
- the right first ball lens 22C is placed in the right first lens groove 12C.
- the middle second ball lens 24B is placed in the middle second lens groove 14B, and the right second ball lens 24C is placed in the right second lens groove 14C.
- Both the filter groove 41 and the mount 43 extend so as to include a position from the extension of the left V groove 11A to the extension of the right V groove 11C.
- a middle laser diode 25B is mounted on an extension of the middle V-groove 11B on the mount 43
- a right laser diode 25C is mounted on an extension of the right V-groove 11C on the mount 43.
- the dielectric multilayer filter 42 in the filter groove 41 is disposed at a position extending from an extension of the left V-groove 11A to an extension of the right V-groove 11C.
- a middle photodiode 26B and a right photodiode 26C are mounted on the rear surface side of the light transmissive substrate 40.
- the middle photodiode 26B is disposed immediately below a line connecting the middle optical fiber 21B and the middle laser diode 25B.
- the middle amplifier is provided at a position adjacent to the middle photodiode 26B (not shown). This middle amplifier is also arranged just below the line connecting the middle optical fiber 21B and the middle laser diode 25B, like the middle photodiode 26B.
- the right photodiode 26C is disposed immediately below a line connecting the right optical fiber 21C and the right laser diode 25C.
- the right amplifier is provided at a position adjacent to the right photodiode 26C (not shown). This right amplifier, like the right photodiode 26C, is disposed immediately below a line connecting the right optical fiber 21C and the right laser diode 25C.
- a left convex lens 31A is formed on the extension of the left V-groove 11A on the surface of the light transmitting substrate 40 and between the left first lens groove 12A and the filter groove 41.
- a middle convex lens 31B is formed on the extension of the middle V groove 11B and between the middle first lens groove 12B and the filter groove 41, and is on an extension of the right V groove 11C.
- a right convex lens 31C is formed between the right first lens groove 12C and the filter groove 41.
- Each of these convex lenses 31A-31C is formed by ion beam etching.
- Light emitted from the left optical fiber 21A is reflected by the dielectric multilayer filter 42, condensed by the left convex lens 31A, and enters the light detection surface of the left photodiode 26A.
- the light emitted from the middle optical fiber 21B is reflected by the dielectric multilayer filter 42, and is reflected by the middle convex lens 3B.
- the light is condensed by IB and is incident on the light detection surface of the middle photodiode 26B.
- the light emitted from the right optical fiber 21C is reflected by the dielectric multilayer filter 42, is collected by the right convex lens 31C, and is incident on the light detection surface of the right photodiode 26C.
- the laser diodes 25A to 25C that emit optical signals and the photodiodes 26A to which optical signals enter are used.
- the photodiodes 26A-26C having the light-transmitting substrate 26C are provided on the rear surface side of the light-transmitting substrate 40. For this reason, there is no need to separately provide a submount or the like for providing the photodiodes 26A to 26C, so that there is little space restriction. In addition, there is no need to use a side illuminated photodiode or the like.
- a plurality of optical fibers 21A to 21C are connected, and corresponding laser diodes 25A to 25C and photodiodes 26A to 26C are provided. This is very advantageous in that space restrictions are reduced. Further, in the optical transmitting and receiving module 2 according to the present embodiment, the photodiodes 26A to 26C are all provided immediately below the line connecting the optical fibers 21A to 21C and the laser diodes 25A to 25C. For this reason, the space restriction in the plane direction of the light transmitting substrate 40 is relaxed, and a mode in which a large number of optical fibers are connected by the light transmitting substrate 40 having a small area can be realized.
- the filter groove 41 is formed by anisotropic etching, the filter groove 41 can be formed at an accurate inclination angle. Therefore, the light emitted from the optical fibers 21A-21C can be accurately guided to the photodiodes 26A-26C. Further, the V-grooves 11A to 11C and the lens grooves 12A to 12C and 14A to 14C are also formed to have a predetermined depth by anisotropic etching. Therefore, each element such as the optical fibers 21A-21C and the ball lenses 22A-22C, 24A-24C can be easily and accurately aligned.
- FIG. 4 is a diagram showing an optical transceiver module according to a third embodiment of the present invention, and (a) Is a plan view, and (b) is a side view. In (a), the illustration of the cap is omitted.
- the optical transceiver module 3 includes a light-transmitting substrate 50.
- the light transmissive substrate 50 transmits light having a wavelength in the 1.55 / zm band as well as the silicon substrate, as in the first embodiment.
- a V-groove 51 which is different from the first embodiment in a point that is larger than that of the first embodiment is formed.
- a fiber ferrule 60 is mounted on the V-groove 51.
- the coated fiber 62 is connected to the fiber ferrule 60 via a metallized fiber 61.
- a first lens groove 52, a filter groove 53, and a second lens groove 54 are formed on the surface of the light-transmitting substrate 50.
- a first ball lens 22 that is different only in that the diameter is larger than that in the first embodiment is placed.
- the same dielectric multilayer filter 23 as in the first embodiment is mounted in the filter groove 53. Further, in the second lens groove 54, a second ball lens 24 having a smaller diameter and a different point as compared with the second ball lens in the first embodiment is placed.
- the light emitting portion of the laser diode 25 is substantially laser diode 2 5 and the second ball lens 24 having the same height are used as the center of the second ball lens 24, You.
- the photodiode 26 and the amplifier 27 are mounted on the back surface of the light-transmitting substrate 50 via a not-shown nod.
- the amplifier 27 is mounted at a position adjacent to the photodiode 26.
- the photodiode 26 and the amplifier 27 are disposed immediately below a line connecting the fiber ferrule 60 and the laser diode 25.
- a convex lens is formed by ion beam etching at a position on the surface of the light-transmitting substrate 50 where light reflected from the dielectric multilayer filter 23 passes.
- a wiring substrate 56 made of ceramic is provided on the back side of the light transmitting substrate 50.
- the wiring board 56 has a larger size in plan view than the light transmissive board 50, and has a through hole formed to avoid the photodiode 26 and the amplifier 27.
- Wiring board 56 A plurality of output bonding pads 57 and input bonding pads 58 shown in FIG.
- the power supply of the photodiode 26 and the amplifier 27 and the metallized pattern and the pattern MP from which the output from these can be taken out are put on the wiring board 56.
- the photodiode 26 provided on the back side of the light-transmitting substrate 50 is connected to the metal plate, the pattern MP and the amplifier 27 provided on the wiring substrate 56 via bonding wires 29.
- the metallized pattern MP provided on the back surface of the wiring board 56 is connected to an output bonding pad 57 provided on the surface end of the wiring board 56 via a wiring CE in a contact hole. Further, the input bonding pad 58 is connected to the metallis, the pattern 55 and the laser diode 25 via the bonding wire 59.
- the light transmissive substrate 50 is housed in a concave portion of a ceramic package 63 having a concave portion formed in the center.
- Input / output pads 64 are provided on the end surface of the ceramic package 63. These input / output pads 64 are connected to output bonding pads 57 or input bonding pads 58 via bonding wires 65, respectively. Electrical input / output terminals 66 are attached to the input / output pads 64, respectively.
- the opening above the recess of the ceramic package 63 is covered with a cap 67.
- the cap 67 is made of metal, and the coated fiber 62 is arranged outside the cap 67.
- a metallized fiber 61 for connecting the coated fiber 62 and a fiber ferrule 60 provided inside the cap 67 is interposed between the cap 67 and the ceramic package 63. At this position, the cap 67 and the metallized fiber 61 are soldered, so that the inside of the ceramic package 63 is airtight! RU
- a V groove 51, lens grooves 52 and 54, and a filter groove 53 are formed by anisotropic etching. Further, a metallized pattern 55 is provided. Subsequently, a metallization mark is provided on the rear surface of the light-transmitting substrate 50 by a semiconductor process aligned with the V-groove 51 on the front surface, and the photodiode 26 is precisely die-bonded to the metallization mark. To do.
- the amplifier 27 is die-bonded to a position adjacent to the photodiode 26, and the back surface of the light-transmitting substrate 50 is die-bonded to the wiring substrate 56. Subsequently, the photodiode 26, the pad of the amplifier 27, and the wiring board 56 are connected by the bonding wire 29.
- die bonding and bonding on the surface of the light transmitting substrate 50 are performed.
- the laser diode 25 is precisely die-bonded onto the metallized pattern 55.
- the ball lenses 22, 24 and the dielectric multilayer filter 23 are placed in the lens grooves 52, 54 and the filter groove 53, respectively. At this time, each element is placed using each groove as a guide.
- the ball lenses 22, 24 and the dielectric multilayer filter 23 are bonded to the lens grooves 52, 54 and the filter groove 53, respectively, with an epoxy or acrylic adhesive.
- the light transmitting substrate 50 and the wiring substrate 56 are die-bonded to the ceramic package 63.
- the bonding wires 59 connect the terminals of the laser diode 25 to the input bonding pads 58 provided on the wiring board 56 and the pads 57, 58 on the wiring board 56 to the input / output pads 64 on the ceramic package 63, respectively. , 65 connect.
- the metallized fiber 61 with the fiber ferrule 60 attached to the tip is attached so that the fiber ferrule 60 fits on the V-groove 51 and is fixed with an ultraviolet-curing resin such as an epoxy or acrylic resin.
- an ultraviolet-curing resin such as an epoxy or acrylic resin.
- the inside of the ceramic package 63 is hermetically sealed by soldering the metallized fiber 61 to the ceramic package 63 and also to the cap 67 at the same time.
- the optical transceiver module 3 is manufactured.
- a light transmissive substrate is incorporated in a package.
- a laser diode 25 for emitting an optical signal and an optical signal are incident.
- the photodiode having the photodiode 26 is provided on the rear surface side of the light-transmitting substrate 50. For this reason, it is not necessary to separately provide a submount for providing the photodiode 26, so that the space restriction is reduced by that amount. In addition, there is no need to use a side illuminated photodiode or the like.
- the filter groove 53 is formed by anisotropic etching, the filter groove 53 can be formed at an accurate inclination angle. Shi Therefore, the light emitted from the fiber ferrule 60 can be guided to the photodiode 26 with high accuracy. Further, the V-groove 51 and the lens grooves 52 and 54 are also formed to have a predetermined depth by anisotropic etching. Therefore, the fiber ferrule 60, the ball lenses 22, 24, and the connected elements can be easily and accurately aligned.
- FIG. 5 is a sectional view of an optical transceiver module according to the fourth embodiment of the present invention.
- the optical transceiver module 4 includes a light-transmitting substrate 70 that transmits light as a silicon substrate.
- a first lens groove 12, a filter groove 13, and a second lens groove 14 are linearly arranged. These grooves 12-14 have the same size as that described in the third embodiment.
- the first ball lens 22 is placed in the first lens groove 12, the dielectric multilayer filter 23 is placed in the filter groove 13, and the second lens groove 14 is placed in the second lens groove 14.
- a two-ball lens 24 is placed.
- a laser diode 25 is provided on a straight extension line from the first lens groove 12 to the second lens groove 14 on the light transmitting substrate 70.
- an optical waveguide 71 is formed along the straight line.
- the optical waveguide 71 is formed on the light transmitting substrate 70 by using polyimide or the like. At this time, the height of the core of the optical waveguide 71 can be adjusted to the height of the optical axis of the light passing through the first ball lens 22 by adjusting the thickness of the polyimide.
- a photodiode 26, an amplifier 27, and a wiring board 28 similar to those in the first embodiment are arranged on the back side of the light transmissive substrate 70 with the same positional relationship. Further, a convex lens 31 is formed on the light transmitting substrate 70 at a position where the light reflected from the dielectric multilayer filter 23 passes. In other respects, it has the same configuration as the first embodiment.
- the optical fiber The optical waveguide 71 is formed instead of the optical waveguide, and the light input / output section constitutes the tip of the optical waveguide 71.
- a laser diode 25 for emitting an optical signal and a photodiode 26 for receiving the optical signal are provided.
- the photodiode 26 is provided on the back surface side of the light transmitting substrate 70. For this reason, there is no need to separately provide a submount for providing the photodiode 26, so that there is little space restriction. Also, there is no need to use a side-illuminated photodiode or the like.
- the filter groove 13 is formed by anisotropic etching, the filter groove 13 can be formed at an accurate inclination angle. Therefore, the light emitted from the optical waveguide 71 can be guided to the photodiode 26 with high accuracy.
- the lens grooves 12, 14 are also formed to have a predetermined depth by anisotropic etching. Therefore, elements such as the ball lenses 22, 24 can be easily and accurately aligned.
- FIG. 6A and 6B are diagrams showing an optical transceiver module according to a fifth embodiment of the present invention, wherein FIG. 6A is a plan view and FIG. 6B is a side sectional view.
- the optical transmitting / receiving module 5 includes a light transmitting substrate 80 that transmits light as a silicon substrate. On the surface of the light-transmitting substrate 80, a filter groove 53 and a second lens groove 54 are formed. The dielectric multilayer filter 23 is mounted in the filter groove 53, and the second ball lens 24 is mounted in the second lens groove 54.
- the photodiode 26, the amplifier 27, and the wiring board 56 are provided on the back side of the light-transmitting substrate 80. Further, the light transmissive substrate 80 is contained in a ceramic package 81. The inside of the ceramic package 81 is hermetically sealed by a flat cap 82.
- a lens holder 83 is attached to the side wall of the ceramic package 81 by YAG welding. This YAG welding is performed after the alignment work is performed.
- lens The first ball lens 84 is accommodated in the holder 83, and the fiber ferrule 85 is inserted into the lens holder 83.
- a coated fiber 87 is connected to the fiber ferrule 85.
- a through hole is formed in the side wall of the ceramic package 81, and a transparent window 88 that closes the through hole is provided.
- the light emitted from the fiber ferrule 85 reaches the dielectric multilayer filter 23 in the ceramic package 81 via the first ball lens 84. Further, the light of the laser diode 25 transmitted through the dielectric multilayer filter 23 reaches the fiber ferrule 85 via the transparent window 88 and the first ball lens 84.
- the third embodiment has the same configuration as the third embodiment.
- both the fiber ferrule 85 and the first ball lens 84 are accommodated in the lens holder 83, and the lens holder 83 is attached to the ceramic package 81. Is fixed to the side wall.
- the photodiode 26 is provided on the back side of the light transmissive substrate 80 as in the third embodiment. For this reason, there is no need to separately provide a submount or the like for providing the photodiode 26, so that there is little space restriction. In addition, there is no need to use a side illuminated photodiode or the like.
- the filter groove 53 is formed by anisotropic etching, the filter groove 53 can be formed at an accurate inclination angle. Therefore, the light emitted through the transparent window 88 can be guided to the photodiode 26 with high accuracy.
- the lens groove 54 is also formed to have a predetermined depth by anisotropic etching. Therefore, elements such as the second ball lens 24 can be easily and accurately aligned.
- the optical transceiver module 5 uses a metallized fiber like the optical transceiver module described in the third embodiment, so that the cost can be reduced accordingly. it can.
- the fiber ferrule 85 and the first ball lens 83 are not mounted on the light-transmitting substrate 80, it is necessary to perform the alignment separately. is there.
- the first ball lens 84 is fixed by a tapered portion formed at the tip of the lens holder 83 into which the fiber ferrule 85 is press-fitted. Because of this fiber The center of the ferrule 85 and the center of the first ball lens 84 can be accurately aligned. Also, since the light emitted from the first ball lens 84 is a parallel light, the alignment in the optical axis direction is unnecessary.
- the positional relationship among the photodiode 26, the laser diode 25, the second ball lens 24, and the dielectric multilayer filter 23 is matched with high precision. For this reason, the alignment work only needs to be performed on the laser beam in the direction perpendicular to the optical axis.
- the present invention is not limited to the above embodiments.
- the home optical transmission / reception module has been described.
- the optical transmission / reception module of the present invention can be used as an optical transmission / reception module for a base station.
- the laser diode emits light in the 1.55 / zm band
- the dielectric film filter transmits light in the 1.55m band and reflects light in the 1.55m band.
- a back-illuminated photodiode is used as the photodiode, but a front-illuminated photodiode can also be used.
- each groove can be formed by, for example, NC kneading.
- the present invention is used for optical communication, optical information processing, and the like, and can be used for an optical transmission and reception module for transmitting and receiving light.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/589,605 US7486846B2 (en) | 2004-02-17 | 2005-02-15 | Optical transmitting /receiving module |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-040445 | 2004-02-17 | ||
JP2004040445A JP2005234052A (ja) | 2004-02-17 | 2004-02-17 | 光送受信モジュール |
Publications (1)
Publication Number | Publication Date |
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WO2005078495A1 true WO2005078495A1 (ja) | 2005-08-25 |
Family
ID=34857890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/002248 WO2005078495A1 (ja) | 2004-02-17 | 2005-02-15 | 光送受信モジュール |
Country Status (5)
Country | Link |
---|---|
US (1) | US7486846B2 (ja) |
JP (1) | JP2005234052A (ja) |
CN (1) | CN1918497A (ja) |
TW (1) | TW200540481A (ja) |
WO (1) | WO2005078495A1 (ja) |
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US8095016B2 (en) * | 2007-01-30 | 2012-01-10 | Nec Corporation | Bidirectional, optical transmitting/receiving module, optical transmitting/receiving device, and bidirectional optical transmitting/receiving module manufacturing method |
JP4280290B2 (ja) * | 2007-03-28 | 2009-06-17 | Okiセミコンダクタ株式会社 | 光モジュール及びその製造方法 |
JP4983391B2 (ja) * | 2007-05-17 | 2012-07-25 | 株式会社日立製作所 | 光モジュール及びその製造方法 |
KR100960745B1 (ko) | 2008-07-15 | 2010-06-01 | 김정수 | 쐐기형 서브마운트를 가지는 양방향 통신용 광모듈 패키지 |
KR100982018B1 (ko) * | 2008-10-02 | 2010-09-14 | 한국전자통신연구원 | 양방향 광송수신 장치 |
JP5226488B2 (ja) | 2008-12-05 | 2013-07-03 | 浜松ホトニクス株式会社 | 光素子モジュールの製造方法 |
CN102087390B (zh) * | 2009-12-08 | 2012-08-29 | 富士康(昆山)电脑接插件有限公司 | 光电连接器组件 |
CZ302146B6 (cs) * | 2010-02-16 | 2010-11-10 | Ceské vysoké ucení technické v Praze | Integrovaný optoelektronický transceiver pro úcastnickou stranu síte typu PON-FTTH |
EP2434321A1 (en) * | 2010-09-27 | 2012-03-28 | U2t Photonics Ag | Optical module |
CN102324975B (zh) * | 2011-07-21 | 2014-08-27 | 索尔思光电(成都)有限公司 | 一种单芯双向光学次模块 |
US9243761B2 (en) | 2013-02-28 | 2016-01-26 | Sumitomo Electric Industries, Ltd. | Optical assembly and method for assembling the same, and optical module implemented with optical assembly |
DE102013205594A1 (de) * | 2013-03-28 | 2014-10-02 | Osram Opto Semiconductors Gmbh | Laserbauelement und Verfahren zu seiner Herstellung |
CN103609048B (zh) * | 2013-06-24 | 2016-08-31 | 华为技术有限公司 | 一种光模块及光网络系统 |
JP2016004224A (ja) | 2014-06-19 | 2016-01-12 | 富士通株式会社 | 光学モジュール、光学モジュールの製造方法及び光学装置 |
WO2016030970A1 (ja) * | 2014-08-26 | 2016-03-03 | 住友電気工業株式会社 | 光アセンブリ |
KR101843469B1 (ko) | 2016-04-19 | 2018-03-30 | 옵티시스 주식회사 | 광 커넥터 |
JP6504142B2 (ja) * | 2016-11-09 | 2019-04-24 | 住友電気工業株式会社 | 光アセンブリ |
JP6814076B2 (ja) | 2017-03-14 | 2021-01-13 | 浜松ホトニクス株式会社 | 光モジュール |
US10291332B2 (en) * | 2017-04-11 | 2019-05-14 | Innovatice Micro Technology | Self-aligned silicon fiber optic connector |
JP6943660B2 (ja) * | 2017-07-14 | 2021-10-06 | 株式会社エンプラス | 光レセプタクルおよび光モジュール |
US10656338B2 (en) * | 2017-11-02 | 2020-05-19 | Poet Technologies, Inc. | Wafer-level optoelectronic packaging |
CN109975910B (zh) * | 2017-12-28 | 2022-02-18 | 迪睿合株式会社 | 偏振光板及其制造方法以及光学设备 |
CN111665599A (zh) * | 2019-03-08 | 2020-09-15 | 苏州旭创科技有限公司 | 光模块 |
US11664902B2 (en) * | 2019-08-19 | 2023-05-30 | Nokia Solutions And Networks Oy | Planar assemblies for optical transceivers |
US11474301B2 (en) * | 2021-01-07 | 2022-10-18 | Advanced Semiconductor Engineering, Inc. | Device for communication |
WO2023063196A1 (ja) * | 2021-10-11 | 2023-04-20 | 古河電気工業株式会社 | 光学装置 |
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- 2005-02-15 WO PCT/JP2005/002248 patent/WO2005078495A1/ja active Application Filing
- 2005-02-15 US US10/589,605 patent/US7486846B2/en not_active Expired - Fee Related
- 2005-02-16 TW TW094104392A patent/TW200540481A/zh unknown
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Also Published As
Publication number | Publication date |
---|---|
CN1918497A (zh) | 2007-02-21 |
JP2005234052A (ja) | 2005-09-02 |
US7486846B2 (en) | 2009-02-03 |
US20070286549A1 (en) | 2007-12-13 |
TW200540481A (en) | 2005-12-16 |
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