WO2005064372A1 - 光導波路基板、光送受信モジュール並びに光伝送装置 - Google Patents
光導波路基板、光送受信モジュール並びに光伝送装置 Download PDFInfo
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- WO2005064372A1 WO2005064372A1 PCT/JP2004/019258 JP2004019258W WO2005064372A1 WO 2005064372 A1 WO2005064372 A1 WO 2005064372A1 JP 2004019258 W JP2004019258 W JP 2004019258W WO 2005064372 A1 WO2005064372 A1 WO 2005064372A1
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- Prior art keywords
- groove
- optical
- optical waveguide
- waveguide substrate
- optical filter
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Classifications
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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
- Optical waveguide substrate, optical transceiver module and optical transmission device Optical waveguide substrate, optical transceiver module and optical transmission device
- the present invention relates to an optical waveguide substrate in the field of optical communication, an optical transmission / reception module using the optical waveguide substrate, and an optical transmission device.
- a conventional optical transmitting / receiving module generally has a structure in which an optical waveguide and a wavelength division multiplexing (WDM) filter are combined in order to separate a signal of a reception wavelength ⁇ 2 from a transmission wavelength ⁇ 1.
- WDM wavelength division multiplexing
- FIGS. 15A and 15B are diagrams showing a conventional schematic structure of a WDM optical bidirectional module using an optical waveguide.
- optical waveguides la, lb, and 3 are formed in a star shape on the Si substrate 30 with the optical filter 4 as the center, and light is transmitted to each end of the optical waveguides la, lb, and 3 respectively.
- the fiber 8, light-receiving element (PD) 6, and light-emitting element (LD) 5 are mounted by two-dimensional high-precision alignment so that incoming and outgoing light can be optically coupled.
- Patent Document 1 JP-A-11-68705 (Abstract, FIG. 1)
- the output light of the wavelength ⁇ 1 of the LD 5 is transmitted through the optical waveguide la and reflected by the optical filter 4 bonded and fixed to the groove 10 formed perpendicularly to the Si substrate 30 by the adhesive 11. After that, it is introduced into the optical fiber 8 through the optical waveguide lb.
- the optical signal of the wavelength ⁇ 2 transmitted from the optical fiber 8 is transmitted via the optical waveguide lb, passes through the optical filter 4, and is received by the PD 6 via the optical waveguide 3.
- Output light of wavelength ⁇ 1 is emitted from the opposite side of the optical waveguide la of LD5, and this output light is received by the monitoring PD (M-PD) 7 that monitors the power of LD5.
- the present invention solves the above-mentioned problems of the conventional example, and provides an optical waveguide substrate on which an optical filter can be arranged with good manufacturability, an optical transmission / reception module using the optical waveguide substrate, and an optical transmission device.
- the purpose is to:
- the optical waveguide substrate according to the present invention is configured such that a groove is formed in a part of the substrate so as to intersect the optical waveguide, and an optical filter is inserted and arranged in the groove.
- the side surface is tapered or rectangular in the horizontal direction as viewed from the bottom surface force of the groove, and has a width larger than the width of the groove located at a portion intersecting with the optical waveguide.
- an optical waveguide substrate in which a groove is formed in a part of the substrate so as to intersect with the optical waveguide and an optical filter is inserted and arranged in the groove, at least one side surface of the groove has a bottom surface force of the groove.
- the groove is tapered or rectangular in the vertical direction when viewed, and the groove width at the upper part of the groove is larger than the groove width at the bottom surface of the groove.
- the groove is formed on four or more surfaces.
- the groove is formed using a blade in which a plurality of blades having different diameters are integrated. This structure eliminates the need to replace the blade to change the width of the groove, thereby reducing man-hours, that is, improving productivity.
- an optical transceiver module using the optical waveguide substrate having the above-described characteristics is configured. With this configuration, it is possible to reduce the price of the optical transceiver module.
- an optical transmission device using the above-described optical transmission / reception module is configured. With this configuration, the price of the optical transmission device can be reduced.
- At least one side surface of the groove is tapered or rectangular in the horizontal or vertical direction as viewed from the bottom surface force of the groove, and intersects with the optical fiber.
- FIG. 1 is a perspective view of a transmission / reception module having a WDM function for describing an optical waveguide substrate according to a first embodiment of the present invention.
- FIG. 2A is a plan view of an optical transceiver module to which the present invention is applied.
- FIG. 2B is a sectional view of an optical transceiver module to which the present invention is applied.
- FIG. 3 is a graph showing an example of a wavelength transmission characteristic of an optical filter.
- FIG. 4A is a plan view of the optical waveguide substrate according to the first embodiment of the present invention.
- FIG. 4B is a sectional view of the optical waveguide substrate according to the first embodiment of the present invention.
- FIG. 5A is a plan view of the optical waveguide substrate according to the first embodiment of the present invention.
- FIG. 5B is a sectional view of the optical waveguide substrate according to the first embodiment of the present invention.
- FIG. 6A is a plan view of the optical waveguide substrate according to the first embodiment of the present invention.
- FIG. 6B is a sectional view of the optical waveguide substrate according to the first embodiment of the present invention.
- FIG. 7A is a plan view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 7B is a sectional view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 7C is a cross-sectional view illustrating a modified example of the optical waveguide substrate according to the second embodiment of the present invention.
- FIG. 8A is a plan view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 8B is a sectional view of the optical waveguide substrate according to the second embodiment of the present invention.
- FIG. 9A is a plan view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 9B is a sectional view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 10A is a plan view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 10B is a sectional view of the optical waveguide substrate according to the second embodiment of the present invention.
- FIG. 10C is a perspective view of an optical waveguide substrate according to a second embodiment of the present invention.
- FIG. 11A is a plan view of an optical waveguide substrate according to a third embodiment of the present invention.
- FIG. 11B is a sectional view of the optical waveguide substrate according to the third embodiment of the present invention.
- FIG. 11C is a perspective view of an optical waveguide substrate according to a third embodiment of the present invention.
- FIG. 12A is a plan view of an optical waveguide substrate according to a third embodiment of the present invention.
- FIG. 12B is a cross-sectional view of the optical waveguide substrate according to the third embodiment of the present invention.
- FIG. 12C is a perspective view of an optical waveguide substrate according to a third embodiment of the present invention.
- FIG. 13A is a perspective view of a blade of an optical waveguide substrate according to a fourth embodiment of the present invention.
- FIG. 13B is a cross-sectional view showing the relationship between the optical waveguide substrate and the blade of the optical waveguide substrate according to the fourth embodiment of the present invention.
- FIG. 14A is a plan view of an optical waveguide substrate according to a fourth embodiment of the present invention.
- FIG. 14B is a sectional view of an optical waveguide substrate according to a fourth embodiment of the present invention.
- FIG. 15A is a conventional perspective view of a WDM optical bidirectional module using an optical waveguide.
- FIG. 15B is a conventional sectional view of a WDM optical bidirectional module using an optical waveguide.
- FIG. 1 is a perspective view of a transmission / reception module having a WDM function for describing an optical waveguide substrate according to a first embodiment of the present invention
- FIGS. 2A and 2B are views for supplementary explanation thereof.
- the optical transceiver module consists of an optical waveguide la, lb, 3, an optical filter 4, a light-emitting element (LD) 5, a light-receiving element (PD) 6, and a light-emitting element monitoring PD (M-PD). 7, an optical fiber 8, an adhesive 11, and an optical waveguide substrate 30 having a V-groove.
- LD light-emitting element
- PD light-receiving element
- M-PD light-emitting element monitoring PD
- An optical fiber 8 aligned so as to be optically coupled to the LD 5 emerges from the package of the optical transceiver module.
- the optical waveguides la and lb A groove 10 is formed between the passages 3.
- an adhesive 11 such as a UV or thermosetting type. The adhesive is fixed to the side surface portion 12 on which the optical filter 4 is arranged.
- FIG. 3 shows an example of the wavelength transmission characteristics of the optical filter 4.
- This optical filter 4 has a characteristic that the transmittance is low near the wavelength ⁇ 1 and the transmittance is high near the wavelength 2 with respect to the optical signals of wavelengths ⁇ 1 and ⁇ 2 where ⁇ ⁇ ⁇ 2. ing. Therefore, the optical signal of the wavelength ⁇ 1 emitted from the LD 5 propagates through the optical waveguide la, is reflected by the optical filter 4, is guided to the optical waveguide lb thereabove, and then is transmitted to the optical waveguide lb. The light is transmitted to the optical fiber 8 disposed at the center.
- FIGS. 2A and 2B show the portion between plane C and plane D in FIG. 1 as viewed in the direction A and viewed from the direction B, respectively.
- the groove 10 is formed in the Si substrate 30 by a dicing apparatus so as to intersect the optical waveguides la, lb, and 3.
- the side surface or a part of the side surface of the groove portion 10 is tapered (or rectangular), and the groove located at a portion intersecting the optical waveguides la, lb, 3 By making the width larger than the width, it becomes easy to insert the optical filter 4 into the groove 10.
- the optical filter 4 After the optical filter 4 is inserted into the groove 10 and the position is adjusted, the optical filter 4 is fixed to the Si substrate 30 using an adhesive 11 such as UV resin or thermosetting resin. You. Here, since part or all of the portion of the side surface of the groove 10 that is joined to the optical filter 4 is a flat surface, the positioning and fixing of the optical filter 4 become easy and accurate, and stable characteristics are obtained. Becomes possible.
- FIGS. 4A and 4B show the case where the side surface 20a in the horizontal direction with respect to the bottom surface 2 of the groove is tapered when viewed from the direction A in FIG. The view from the direction B and the direction B are shown.
- FIGS. 6A and 6B show that the side surfaces 20a and 20b are both tapered in the horizontal direction with respect to the groove bottom surface 2 among the side surfaces with respect to the groove bottom surface 2 when viewed in the direction A of FIG. In this case, they are seen from the A direction and the B direction, respectively.
- the tapered portions may be all rectangular or a combination of tapered and rectangular. These tapered or rectangular portions have a width larger than the width of a groove located at a portion intersecting the optical waveguides la, lb, and 3.
- At least one side surface of the groove 10 is tapered (or rectangular) in the horizontal direction when viewed from the bottom surface 2 of the groove, and the optical waveguide la
- the arrangement of the optical filter 4 is facilitated, the number of steps is reduced, and the price is reduced by improving the product yield.
- FIG. 1 is a schematic configuration diagram illustrating an embodiment.
- Figures 7 ⁇ and 7 ⁇ show the direction A and B when the side 21a is tapered in the direction perpendicular to the bottom 2 of the groove, of the side to the bottom 2 of the groove when the force in the direction of Fig. 1 is also observed.
- Direction force Each state is shown.
- the tapered portion 21a is formed in the waveguide portion as shown in Fig. 7B
- the deposited portion 13 is formed on the waveguide as shown in Fig. 7C
- the tapered portion 21a is formed in the deposited portion. It is also possible to have a structure that can be used.
- FIGS. 8A and 8B show the grooves among the side surfaces with respect to the bottom surface 2 of the groove when viewed in the direction A of FIG. A direction and a B direction force when the side surface 21b is tapered in a direction perpendicular to the bottom surface 2 are shown.
- FIGS. 9A and 9B show that, when viewed from the direction A in FIG. 1, the side surface 21a and the side surface 21b are both tapered in a direction perpendicular to the bottom surface 2 of the groove.
- All of the tapered portions may be rectangular or a combination of tapered and rectangular shapes. In these tapered or rectangular portions, the groove width at the top of the groove is larger than the groove width at the bottom surface 2 of the groove.
- FIGS. 10A and 10B show perspective views of the bottom surface 2 of the groove when viewed from the direction A in FIG. 10C. Both the side surfaces 20a and 20b in the horizontal direction with respect to the bottom surface 2 of the groove are rectangular. In the case where both sides 21a and 21b are rectangular in the direction perpendicular to the bottom surface 2 of the groove, the forces in the A and B directions are shown.
- all (or part) of the side 12 of the side surface of the groove 10 that is joined to the optical filter 4 is a flat surface. It has become. That is, as shown in FIGS. 10A and 10B, by making the side surface or a part of the side surface of the groove portion 10 rectangular (or tapered), it becomes easy to insert the optical filter 4 into the groove portion 10.
- the filter 4 it is necessary to arrange the optical filter 4 at a desired angle with respect to the optical waveguides la, lb, and 3 (in this figure, 90 degrees both horizontally and vertically).
- a part or all of the part 12 to be joined to the optical filter 4 in the side surface of the groove 10 is a flat surface.
- the side surface of the groove 10 has a rectangular shape (or a tapered shape) in the vertical direction when viewed from the bottom surface 2 of the groove. Since the width of the groove at the upper part of the groove is larger than the width, the arrangement of the optical filter 4 is facilitated, the number of steps can be reduced, and the price can be reduced by improving the product yield.
- FIGS. 11A, 11B, and 11C and FIGS. 12A, 12B, and 12C show schematic configuration diagrams of the third embodiment.
- 11A and 11B are perspective views of FIG. 11C
- FIGS. 12A and 12B are perspective views of the A direction and B direction forces of FIG. 12C, respectively.
- FIG. 12B is a cross-sectional view taken along plane XY in FIG. 12A.
- 11A and 1 IB show the case where both the side surfaces 20a and 20b in the horizontal direction with respect to the bottom surface 2 of the groove are tapered in the side surface with respect to the bottom surface 2 of the groove when viewed from the direction A.
- FIGS. 12A and 12B show the side surface 21a and the side surface 21b both tapered in the direction perpendicular to the bottom surface 2 of the groove when viewed from the direction A. Is shown.
- the groove 10 is configured by a total of three surfaces of the groove bottom surface 2 and the side surfaces 22 and 23 in FIG. 15B, whereas FIGS. 11A, 11B, In 11C, it is composed of a total of four surface forces, the bottom surface 2 of the groove and the Tsukuda J surface 22, 23, 24.
- the bottom surface 2 of the groove and the side surfaces 22, 23, 24, 24 A total of 25 face forces of 25 are also configured.
- the groove 10 may be configured with six or more surfaces.
- the second embodiment shown in Figs. 7A, 7B and 7C or Figs. 8A and 8B or Figs. 9A and 9B and Figs. 11A, 11B and 11C are shown.
- a configuration in which the third embodiment is combined with the third embodiment is also possible.
- the groove 10 is formed of four or more surfaces, the positioning and fixing of the optical filter 4 are easy and accurate, and stable characteristics can be obtained. It becomes possible.
- FIGS. 13A and 13B are diagrams illustrating a method for manufacturing an optical waveguide substrate according to the fourth embodiment. It is. 14A and 14B are schematic configuration diagrams of an optical waveguide substrate according to the fourth embodiment.
- the dicing blade used to form the groove 10 has a large diameter blade 31 and blades 32a and 32b having a smaller diameter than the blade 31. It is configured to rotate as an axis.
- a blade composed of the blade 31 and the blade 32a or the blade 31 and the blade 32b is also possible.
- FIG. 13B shows a process of forming the groove 10 in the optical waveguide substrate 30 using this blade.
- FIGS. 14A and 14B show a state in which the optical filter 4 is arranged in a groove 10 formed using the blades shown in FIGS. 13A and 13B.
- 14A and 14B are drawings viewed from the A direction and the B direction, respectively.
- both the side surface 21a portion and the side surface 21b portion in the direction perpendicular to the groove bottom surface 2 are rectangular.
- the configuration is such that the rectangular portion is tapered, and the side face 20a in the horizontal direction with respect to the bottom face 2 of the groove, A configuration in which the 2 Ob portion is tapered or rectangular is also possible.
- the fourth embodiment when forming the groove 10 in which the optical filter 4 is to be arranged, it is possible to eliminate the need to replace the blade to change the width of the groove. That is, productivity can be improved.
- the arrangement of the optical filter is facilitated, the number of steps can be reduced, and the cost can be reduced by improving the yield of the product. Since the optical transmission device can be configured, the present invention is widely useful in the field of optical communication and the like.
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Abstract
Description
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JP2003-434902 | 2003-12-26 | ||
JP2003434902A JP2005195615A (ja) | 2003-12-26 | 2003-12-26 | 光導波路基板、光送受信モジュール並びに光伝送装置 |
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WO2005064372A1 true WO2005064372A1 (ja) | 2005-07-14 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106716200A (zh) * | 2014-09-22 | 2017-05-24 | 日本电气株式会社 | 光电路元件和光电路元件的配置方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5247383U (ja) * | 1975-10-01 | 1977-04-04 | ||
JPS56121569U (ja) * | 1980-02-12 | 1981-09-16 | ||
JPH10133041A (ja) * | 1996-10-29 | 1998-05-22 | Hitachi Cable Ltd | フィルタ付導波路 |
EP0908746A2 (en) * | 1997-10-06 | 1999-04-14 | Fujitsu Limited | Wavelength division multiplexing optical device and manufacturing method therefor |
JPH11352341A (ja) * | 1998-06-04 | 1999-12-24 | Nec Corp | 導波路型波長多重光送受信モジュール |
JP2000047043A (ja) * | 1998-07-29 | 2000-02-18 | Nippon Telegr & Teleph Corp <Ntt> | フィルタ挿入型導波路デバイスとその製造方法 |
-
2003
- 2003-12-26 JP JP2003434902A patent/JP2005195615A/ja active Pending
-
2004
- 2004-12-22 WO PCT/JP2004/019258 patent/WO2005064372A1/ja not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5247383U (ja) * | 1975-10-01 | 1977-04-04 | ||
JPS56121569U (ja) * | 1980-02-12 | 1981-09-16 | ||
JPH10133041A (ja) * | 1996-10-29 | 1998-05-22 | Hitachi Cable Ltd | フィルタ付導波路 |
EP0908746A2 (en) * | 1997-10-06 | 1999-04-14 | Fujitsu Limited | Wavelength division multiplexing optical device and manufacturing method therefor |
JPH11352341A (ja) * | 1998-06-04 | 1999-12-24 | Nec Corp | 導波路型波長多重光送受信モジュール |
JP2000047043A (ja) * | 1998-07-29 | 2000-02-18 | Nippon Telegr & Teleph Corp <Ntt> | フィルタ挿入型導波路デバイスとその製造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106716200A (zh) * | 2014-09-22 | 2017-05-24 | 日本电气株式会社 | 光电路元件和光电路元件的配置方法 |
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