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1. 发明专利

JP2000081525A PLATFORM OF PLANER OPTICAL WAVE CIRCUIT AND ITS PRODUCTION 失效
公开(公告)号：JP2000081525A
公开(公告)日：2000-03-21
申请号：JP17152999
申请日：1999-06-17
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KAWASHIMA HIROSHI , NARA KAZUTAKA , NAKAMURA SHIRO , WATANABE KAZUNORI
IPC分类号： G02B6/122 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To prevent deformation of a core layer and to stably form a waveguide circuit on a substrate by controlling the glass softening temperature of a height controlling layer to be higher than the glass softening temperature of the core layer and upper clad layer. SOLUTION: The surface of a Si substrate 1 is etched to form a terrace-like part 1a. A quart glass film is formed as a lower clad layer 2. The surface is flattened and a quartz glass film is formed on the substrate 1 and etched to form a height controlling layer 3. Then a quartz glass film is formed to obtain a core layer 4, which is then patterned to form a channel waveguide pattern. Then an upper clad layer 5 of a quartz glass film is formed. A dopant having an effect to decrease the softening point is added to the height controlling layer 3 in a smaller amount than in the core layer 4 and in the upper clad layer 5. The height controlling layer 3 and the upper clad layer 5 on the terrace-like part 1a are removed, and a patterned electrode 7 is formed.

2. 发明专利

JPH01237504A LIGHT GUIDE PARTS AND METHOD FOR CONNECTING SAID PARTS 失效
公开(公告)号：JPH01237504A
公开(公告)日：1989-09-22
申请号：JP6381788
申请日：1988-03-17
申请人： FURUKAWA ELECTRIC CO LTD
发明人： WATANABE KAZUNORI , YANAGAWA HISAHARU , MIYAZAWA HIDEHISA
IPC分类号： G02B6/24 , G02B6/122 , G02B6/36
摘要： PURPOSE:To enable fixing of parts to each other by means of precision pins and to decrease connection losses by providing grooves to be passed with the pins to substrates forming light guides. CONSTITUTION:The grooves 4 to be passed with the pins 5 are provided to the substrate 1 forming the light guide 2. Two pieces of the light guide 2, 2 parts having the grooves 4 are connected by inserting the pins 5 from the grooves 4 of the one light guide part into the grooves 4 of the other light guide part. Since the connecting positions of the light guide 2, 2' parts to each other are thereby precisely connected, the connection losses of the light guides 2, 2' are decreased. The sepn. of the parts is enabled by removing the pins 5 and further the connection with the good reproducibility is enabled.

3. 发明专利

JPS63218835A METHOD FOR MONITORING LIGHT PROPAGATION PATH OF LIGHT TRANSMISSION SYSTEM 失效
公开(公告)号：JPS63218835A
公开(公告)日：1988-09-12
申请号：JP5342487
申请日：1987-03-09
申请人： FURUKAWA ELECTRIC CO LTD
发明人： WATANABE KAZUNORI , YANAGAWA HISAHARU , KAMATA YOSHIYUKI , HAYAKAWA KOICHI
IPC分类号： G01M11/00 , G02B6/00 , H04B10/03 , H04B10/07 , H04B10/071 , H04B10/077 , H04B10/079
摘要： PURPOSE:To monitor the abnormality of a light propagation path on a transmission side, by interposing an optical filter having a specific wavelength and specific reflectivity on the way of the light propagation path or the end surface thereof. CONSTITUTION:For example, a long wavelength cutting filter reflecting a wavelength of 1.3mum and transmitting a wavelength of 0.85mum is vapor-deposited on the end surface of the optical connector connected to the light circuit terminal apparatus FSU of a subscriber's house. When the use wavelength of this system is set to 0.85mum and the maintenance wavelength thereof is set to 1.3mum, so far as a laser diode or LED of 0.85mum is used to perform transfer of signals, the effect of the filter does not appear too much. When light of 1.3mum is incident as maintenance one from a transmission side, the light of 1.3mum returns to the transmission side through an optical cable with high reflectivity by the filter on the end surface of the optical connector and the power of said light can be measured by the branch device on the transmission side. By this method, the maintenance and investigation on a trouble point up to the end surface of the final optical connector of the optical cable can be performed.

4. 发明专利

JPS61258205A OPTICAL FIBER BENDING DEVICE 失效
公开(公告)号：JPS61258205A
公开(公告)日：1986-11-15
申请号：JP9966485
申请日：1985-05-13
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TSUCHIDA YOSHIO , WATANABE KAZUNORI
IPC分类号： G01M11/00 , G02B6/00 , G02B6/28 , G02B6/287 , G02B6/42
摘要： PURPOSE:To prevent an optical fiber from being damaged, by constituting the titled device so that a guide curved surface has a large radius of curvature of an extent that the optical fiber which has been bent along its surface does not leak a light, and the tip peripheral surface of a bending tool has a small radius of curvature of an extent that the bent optical fiber can make light incident or can leak it. CONSTITUTION:In a state that a bending tool 19 has been moved backward, an SM optical fiber 11 is stretched between slip clamps 15A, 15B, and clamped. Subsequently, a slide arm 33 is moved forward and the bending tool 19 is pushed in between guides 17A, 17B. The SM optical fiber 11 is slipped in the slip clamps 15A, 15B, and pushed in between the guides 17A, 17B. In this state, when light from a light source 43 is irradiated to a bent part of the SM optical fiber 11, a part of its light is made incident on the SM optical fiber 11 and transmitted in the direction as indicated with an arrow (a). In such a way, the operation is executed very easily, also the bending state is stabilized, and a damage of the optical fiber, especially, a breakage can be prevented.

5. 发明专利

JPS60142306A END SURFACE ABUTTING METHOD OF OPTICAL FIBER 失效
公开(公告)号：JPS60142306A
公开(公告)日：1985-07-27
申请号：JP24748083
申请日：1983-12-29
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE , SUMITOMO ELECTRIC INDUSTRIES , FUJIKURA LTD
发明人： TATEGAMI SHIGERU , WATANABE KAZUNORI , MINAMIDA ISAO , TACHIKURA MASAO , USUI YUUICHI , YAMADA TAKESHI
IPC分类号： G02B6/24 , G02B6/255
摘要： PURPOSE:To butt end surfaces of optical fibers against each other while evading the occurrence of trouble by setting the end surfaces of the optical fibers on both surfaces of an abutting plate in abutting relation and then jogging both optical fibers in the opposite directions of the abutting directions, and moving the abutting plate back and moving both optical fibers relatively. CONSTITUTION:The optical fibers 10A and 10B are moved in their abutting directions through slip holders 8A and 8B, and the end surfaces of optical fiber end parts 11A and 11B are set on both surfaces of the abutting plate 6 in abutting relation. Both optical fibers 10A and 10B are jogged in the opposite directions of the abutting directions to separate both optical end surfaces from the abutting plate 6. Consequently, there is no trouble when the abutting plate 6 leaves both optical fiber end surfaces. Then, the optical fiber end parts 11A and 11B are moved relatively in the abutting directions and welded together.

6. 发明专利

JPS63217312A OPTICAL ELEMENT 失效
公开(公告)号：JPS63217312A
公开(公告)日：1988-09-09
申请号：JP5012887
申请日：1987-03-06
申请人： FURUKAWA ELECTRIC CO LTD
发明人： WATANABE KAZUNORI , YANAGAWA HISAHARU , KOKAYU MIKIO
IPC分类号： G02B6/293 , G02B6/34
摘要： PURPOSE:To produce inexpensively an optical element such as an optical mixing or branching filter, optical branching or coupling device, by providing a filter with a specified angle to an optical axis of the optical fiber, and a second optical fiber to the side surface of the optical fiber. CONSTITUTION:A filter 13 comprising optical glass 13a and metallic film 13b is inserted to a groove 11a formed on optical fiber 11 with a specified angle. The tip end of the filter 13 is made to reach a core 11b of the fiber, and optical fiber 12 is bonded to the side surface of the fiber 11. Incident optical signal to the fiber 11 is reflected by the filter 13 and transmitted to a core 12b of the optical fiber 12. Accordingly, a complex stage for polishing each tip end of two optical fibers slantly and bonding through a filter is no more necessary. Thus, an optical element such as optical wave-mixing or branching filter, uni- or multiple mode optical branching or coupling device, is produced inexpensively.

7. 发明专利

JPS62262806A OPTICAL ELEMENT SUCH AS OPTICAL COUPLER OR THE LIKE, AND ITS MANUFACTURE 失效
公开(公告)号：JPS62262806A
公开(公告)日：1987-11-14
申请号：JP10475286
申请日：1986-05-09
申请人： FURUKAWA ELECTRIC CO LTD
发明人： YANAGAWA HISAHARU , HAYAKAWA KOICHI , WATANABE KAZUNORI
IPC分类号： G02B6/293 , G02B6/28
摘要： PURPOSE:To form an optical element which can control a coupling ratio, can lower an insertion loss, and can easily fetch an optical output from a terminal, by melting a part in the longitudinal direction of a bunch fiber having a single mode core, forming it to have a thin diameter, and forming a molten tapered part which can execute optical coupling between single mode cores. CONSTITUTION:The titled optical element is constituted by melting a part in the longitudinal direction of a bunch fiber 2 having a single ode core 1, forming it to a thin diameter, and forming a molten tapered part 3 which can execute optical coupling between each single mode core 1. Since the bunch fiber 2 in which a part of the outside periphery of two pieces of single mode fibers 8 has been welded is used, a thin diameter can easily be formed, and also, a taper of the molten tapered part 3 can easily be controlled, and a coupling ratio and an insertion loss can easily be controlled. Since the bunch fiber 2 is used, two cores are separated enough from each other in a terminal, and an optical output can easily be fetched comparatively.

8. 发明专利

JPS60142311A ALIGNING DEVICE OF OPTICAL FIBER 失效
公开(公告)号：JPS60142311A
公开(公告)日：1985-07-27
申请号：JP24748583
申请日：1983-12-29
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MINAMIDA ISAO , TATEGAMI SHIGERU , WATANABE KAZUNORI , KATOU YASUYUKI
IPC分类号： G02B6/24 , G02B6/38
摘要： PURPOSE:To suppress variation in load on a moving rod and perform high-precision alignment by coupling the tip of the moving rod with the free end of a fiber guide, and providing a threadably engaged member with a driving system for rotation transmission. CONSTITUTION:An external applying mechanism 5 consists of a spring box 21, the moving rod 22, and the threadably engaged member 23. A couple of elastic bodies 24 and 25 are incorporated in the spring box 21, and the base end side of the movig rod 22 is put in said box 21 and supported elastically while the elastic bodies 24 and 25 abut on a projection 22' at the outer circumference in the intermediate part of the lengthwise direction; and the spring box 21 is prevented by a linear bearing for straight movement from shaking laterally, and so supported as to slide upward and downward. The threadable engagement member 23 is equipped with the driving system 33 for rotation transmission, and a gear 34 for rotating the threadably engaged member is fixed as said driving system 33, and a driving gear 36 linked with a motor 35 engages the gear 34 for rotation.

9. 发明专利

JPS60142307A COATING METHOD OF MATCHING LIQUID TO OPTICAL FIBER END SURFACE FOR OPTICAL FIBER WELDING METHOD 失效
公开(公告)号：JPS60142307A
公开(公告)日：1985-07-27
申请号：JP24748183
申请日：1983-12-29
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE , SUMITOMO ELECTRIC INDUSTRIES , FUJIKURA LTD
发明人： WATANABE KAZUNORI , TATEGAMI SHIGERU , KATOU YASUYUKI , USUI YUUICHI , KAKII TOSHIAKI , YAMADA TAKESHI , OOSATO KAZUKUNI
IPC分类号： G02B6/24 , G02B6/255
摘要： PURPOSE:To realize high-precision welding connections of optical fibers by supplying matching liquid to a coater which is movable to between optical fibers, and bringing the matching liquid at the coater side into contact with optical fiber end surfaces to apply just enough matching liquid to both optical fiber end surfaces. CONSTITUTION:The coater 5 having the tip dipped in a liquid tank 7 moves up by specific distance by the quantitative rotaion of a cam 6, part of the matching liquid 8 in the liquid tank 7 sticks on the projection 9 atop the coater and is carried in the same direction, and the matching liquid 9 sticking on the projection part 9 comes into contact with optical fiber end surfaces 4A and 4B. Then, the coater 5 moves down toward its original position by the cam rotation, and a specific amount of matching liquid 9 is left between both end surfaces 4A and 4B. Then, alignment is carried out to obtain the aligned state between optical fibers 1A and 1B, and then both optical end parts 3A and 3B are moved relatively in abutting directions and fusion heat is supplied from a specific machine to weld the end parts 3A and 3B together.

10. 发明专利

JPH01217405A MANUFACTURE OF OPTICAL WAVEGUIDE CIRCUIT WITH OPTICAL FIBER 失效
公开(公告)号：JPH01217405A
公开(公告)日：1989-08-31
申请号：JP4222488
申请日：1988-02-26
申请人： FURUKAWA ELECTRIC CO LTD
发明人： NAKAMURA SHIRO , WATANABE KAZUNORI , YANAGAWA HISAHARU , MIYAZAWA HIDEHISA
IPC分类号： G02B6/30
摘要： PURPOSE:To connect optical fibers without generating the positional shear between a core of an optical fiber and a core of an optical waveguide circuit by previously positioning and fixing optical fibers to be connected on a substrate for an optical waveguide circuit and forming the core and clad of the optical waveguide circuit so as to make them positionally coincide with the core and clad of the optical fiber. CONSTITUTION:The tip of an optical fiber 1 having a core 1a and a clad 1b and previously treated at its end is positioned between optical fiber fixing guides 3 and fixed with adhesives, etc. Then an optical waveguide clad layer 4 is formed on the surface of the substrate 2 up to height coincident with the lower end of the core 1a excluding the optical fiber part 1. Then an optical waveguide core layer 5 of a part other than a required optical waveguide core pattern corresponding to the core 1a of the optical fiber 1 is removed and an optical wave guide core 5' of an optical waveguide circuit connected to the core 1a of the optical fiber 1 is formed. Then an optical waveguide clad layer 6 is formed up to the height of the upper end of the clad 1b of the optical fiber 1. Consequently, the core 1a of the optical fiber 1 can be connected to the optical waveguide core 5' of the optical waveguide circuit without generating their positional shear.

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