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1. 发明专利

JPH0784159A BIDIRECTIONAL WAVELENGTH MULTIPLEXED LIGHT TRANSMISSION MODULE 失效
公开(公告)号：JPH0784159A
公开(公告)日：1995-03-31
申请号：JP18216393
申请日：1993-06-29
申请人： HITACHI CABLE
发明人： NISHIO TOMOYUKI , KUSUYAMA HIROYUKI
IPC分类号： G02B6/42 , H01L31/0232 , H01L33/44 , H01L33/58 , H01L33/00
摘要： PURPOSE:To prevent stray light generated in a module from being received by a light receiving element without using a light shielding body in a bidirection wavelength multiplexed light transmission module. CONSTITUTION:This bidirection wavelength multiplexed light transmission module is composed of a light emitting element 1, lenses 2, 3, a waveguide type optical multiplexer/demultiplexer 11, a light receiving element 6, a package 10 housing a single mode optical fiber 7 and a cover 12 hermetically sealing the package 10 from the upper side and the cover 12 is coated with a black chromate treated coating 13 for light apsorption. By absorbing a light leaked into the package 10 among the lights emitted from the light emitting element 1, the intrusion of stray light to the light receiving element 6 is prevented.

2. 发明专利

JPH04152306A OPTICAL TRANSMISSION MODULE 失效
公开(公告)号：JPH04152306A
公开(公告)日：1992-05-26
申请号：JP27622590
申请日：1990-10-17
申请人： HITACHI LTD , HITACHI CABLE
发明人： AOKI SATOSHI , UETSUKA NAOTO , KUSUYAMA HIROYUKI
IPC分类号： G02B6/42 , G02B6/122
摘要： PURPOSE:To absorb the excessive light which passes through a clad layer and to execute the optical transmission of a low crosstalk and a high quality by providing a light absorbing layer whose refractive index is higher than that of the clad layer on the outside of the clad layer for covering a core waveguide. CONSTITUTION:On a glass substrate 9, a light absorbing layer 10 whose refractive index is higher than that of glass and a clad layer 11 whose refractive index is equal to that of glass are formed. Also, on the layer 11, a core waveguide 12 whose refractive index is higher than that of and a clad 13 whose refractive index is lower than that of the waveguide 12 for covering it are formed. Accordingly, an excessive light which passes through the layer 11 and propagates as a stray light in the substrate 9 such as a clad mode excited by the difference of an optical waveguide and the near field distribution of an incident light, a scattered light in the optical waveguide, a radiation light generated by a bend part of the waveguide, etc., is absorbed by the layer 10 whose refractive index is high, provided on the outside of the layer 11. In such a manner, the optical transmission of a low crosstalk and a high quality can be executed.

3. 发明专利

JPH02122217A OPTICAL POSITION DETECTING SENSOR 失效
公开(公告)号：JPH02122217A
公开(公告)日：1990-05-09
申请号：JP27581988
申请日：1988-10-31
申请人： HITACHI CABLE
发明人： SATO MITSUHIRO , KUSUYAMA HIROYUKI
IPC分类号： G01D5/36 , G01B7/00 , G01D5/20 , G01D5/30
摘要： PURPOSE:To prevent the generation of a malfunction even if an external magnet deviates from a detection range and to detect the displacement as non-contact by providing a slide magnetic material and a lock use magnet. CONSTITUTION:A slide magnetic material 4 receives suction force of an external magnet 3, and moves in a slide space 15 together with the magnet 3, when the magnet 3 moves. When the magnet 3 exceeds a detection range and moves on, the magnetic material 4 runs against an end part of the space 15 and stops, and also, locked magnetically to its position by suction force of a lock use magnet 5. When the title sensor is constituted so that a spiral-like magnetic material 2 can be sucked magnetically and constrained by this locked magnetic material 4, it receives restraint by the magnetic material 4, and a free rotation of a rotating body 1 is not generated irrespective of existence of the magnet 3. Also, when the magnet 3 is reset to its original state and returns into the detection range, the magnetic material 4 receives suction force of the magnet 3 again and moves together with the magnet 3, and a suction position of the magnetic material 2 also moves, and the rotating body 1 rotates thereby.

4. 发明专利

JPH01235814A DISPLACEMENT DETECTING SENSOR 失效
公开(公告)号：JPH01235814A
公开(公告)日：1989-09-20
申请号：JP6223588
申请日：1988-03-16
申请人： HITACHI CABLE
发明人： SATO MITSUHIRO , KUSUYAMA HIROYUKI
IPC分类号： G01D5/347 , G01D5/34
摘要： PURPOSE:To improve reliability by effecting the movement of a light shielding body by the displacement of an object to be detected in a non-contact state by a magnetic material which is separately provided to the side of the object to be detected. CONSTITUTION:The light emitted by a light emitting element is emitted as collimated beams 3a of light by a rod lens 2 via an optical fiber cable 1. The exit light beams 3a are subjected to 90 deg. directional change by a 1st reflecting mirror 6, then to 90 deg. directional change by the 2nd reflecting mirror 6' so that the entire light is projected as the reflected light beams 3b parallel with the exit light beams 3a on the rod lens 2', and is received by the light receiving element via the optical fiber cable 1'. Another magnetic material 16 mounted to the side of the object to be detected is provided to the outside of the magnetic material 15. The magnetic material 15 on the light shielding body 5 side is attracted and moved in a non-contact state as the magnetic material 16 is moved like a dotted line by the displacement of the object to be detected. A light shielding piece 5a is thereby moved and the optical path between the reflecting mirrors 6 and 6' is shut off as shown by the dotted line. The generation of a trouble is thus obviated even if the entire part of the detecting system is hermetically closed and, therefore, the stable state is maintained over a long period of time and the reliability is improved.

5. 发明专利

JP2000347076A OPTICAL FIBER CABLE WITH CONNECTOR 失效
公开(公告)号：JP2000347076A
公开(公告)日：2000-12-15
申请号：JP15634899
申请日：1999-06-03
申请人： HITACHI CABLE
发明人： KUSUYAMA HIROYUKI , WASHIMI TOMOICHI , ISHIKAWA MASARU
IPC分类号： H01B11/00 , G02B6/38 , G02B6/44
摘要： PROBLEM TO BE SOLVED: To enable nonmetallizing, fire retardance, excellent handling and a lower cost by housing an optical fiber into double pipes made of plastic and mounting optical connectors at its terminals. SOLUTION: The optical fiber cable with connectors is produced by housing the optical fiber 11 in the state of including its extra lengths into the inside pipe 10 made of plastic, inserting this inside pipe 10 into the outside pipe 12 made of plastic and mounting the optical connectors 13 having ferrules 15 at both terminals. The inside pipe 10 is preferably composed of a cylindrical pipe having a smooth surface and the outside pipe 12 of a grooved pipe structure of a bore in proximity to the outside surface of the inside pipe. As a result, the outside pipe 12 acts as a guide to substantially prevent the occurrence of buckling in the inside pipe 10 and to make the handling easy and excellent when the double pipes are bent over the entire part. When the double pipes 14 are crushed by abnormal compressive force, the inside pipe 10 acts as a buffer to provide an effect of preventing the direct damage on the fiber 11. Since the materials are the plastic, the damage on the optical fiber 11 hardly arises.

6. 发明专利

JPH06313819A WAVEGUIDE TYPE OPTICAL MODULE 失效
公开(公告)号：JPH06313819A
公开(公告)日：1994-11-08
申请号：JP10309793
申请日：1993-04-28
申请人： HITACHI CABLE
发明人： INABA KIMIO , KUSUYAMA HIROYUKI
IPC分类号： G02B6/122 , G02B6/12 , G02B6/42
摘要： PURPOSE:To provide a waveguide type optical module generating certain fixed optical fiber output. CONSTITUTION:A light emitting element 13 for generating optical signals of specified wavelength, an optical fiber 24 for propagating transmit-receive optical signals, and a quartz waveguide base 19 disposed between the light emitting element 13 and the optical fiber 24 are fixed into a case 10. The waveguides of the waveguide base 19 form a wavelength composer-divider 23, and one of the waveguides guides the optical signal of the light emitting element 13 to the optical fiber 24. In a waveguide type optical module of such constitution, the laser beams of a carbon dioxide laser or the like are irradiated to the core part 20 of the waveguide to adjust the refractive index of the core part 20, thus adjusting optical fiber output.

7. 发明专利

JPH06177485A SEMICONDUCTOR LASER DEVICE 失效
公开(公告)号：JPH06177485A
公开(公告)日：1994-06-24
申请号：JP32535992
申请日：1992-12-04
申请人： HITACHI CABLE
发明人： SAITO RYUICHI , KUSUYAMA HIROYUKI
IPC分类号： G02B6/42 , H01S5/00 , H01S3/18
摘要： PURPOSE:To fix a semiconductor laser and an optical part with high accuracy and high reliability by previously installing a welding block made of a ferro- alloy similar to a holder material in the welding section of a stem and welding the welding block and a holder by a YAG laser. CONSTITUTION:A stem 2 is composed of copper having high thermal conductivity in order to smoothly remove heat from a semiconductor laser chip. A welding block 7 made of kaval is mounted integrally on the front of the stem 2 made of copper as a YAG laser welding section. On the other hand, a holder 4, on which a lens 3 for converging light emitted from a semiconductor laser 1 on the stem 2 is fixed previously, and which is made of kaval having low thermal expansion, is prepared. The welding section of the holder 4 and the welding block 7 are abutted, the optical axes of the semiconductor laser 1 and the less 3 are adjusted, and abutted sections 6 are irradiated with the YAG laser, thus unifying the holder 4 and the stem 2, then allowing fixing and maintaining with high accuracy and high reliability.

8. 发明专利

JPH06160673A LASER MODULE FOR BI-DIRECTIONAL TRANSMISSION 失效
公开(公告)号：JPH06160673A
公开(公告)日：1994-06-07
申请号：JP31513292
申请日：1992-11-25
申请人： HITACHI CABLE
发明人： KUSUYAMA HIROYUKI , TAKANASHI KATSUYA , HORIE MAKOTO , NISHIO TOMOYUKI , TERAOKA TATSUO , MOROSAWA KENICHI
IPC分类号： G02B6/42
摘要： PURPOSE:To provide the laser module for bi-directional transmission which is small-sized and low in cost and has high performance. CONSTITUTION:One-end sides 2a, 3a, and 4a of short single-mode optical fibers 2, 3, and 4 are connected by fusion splicing to the incident port 11b, projection port 11c, and incidence/projection port 11a of a glass waveguide type multiplexing and demultiplexing element 1; and a laser diode 5 is connected closely opposite to the other end 2b of the single-mode optical fiber 2 connected to the incidence port 11b, a photodetecting element 6 is connected to the other end 4b of the single-mode optical fiber 4 connected to the projection port 11c, and then a single-mode optical fiber 7 for two-way transmission is connected to the other end 3b of the single-mode optical fiber 3 connected to the incidence/ projection port 11a. The waveguide type multiplexing and demultiplexing element 1, laser diode 5, photodetecting element 6, and short single-mode optical fibers 2, 3, and 4 are stored in an airtightly sealed package 14.

9. 发明专利

JPH05142450A WDM MODULE FOR BI-DIRECTIONAL OPTICAL TRANSMISSION 失效
公开(公告)号：JPH05142450A
公开(公告)日：1993-06-11
申请号：JP30636291
申请日：1991-11-21
申请人： HITACHI CABLE , HITACHI LTD
发明人： UETSUKA NAOTO , KUROSAWA MASAAKI , KUSUYAMA HIROYUKI , AOKI SATOSHI , IMOTO KATSUYUKI , KOYAMA YUKIO
IPC分类号： G02B6/122 , G02B6/12 , G02B6/28 , G02B6/293 , G02B6/42 , H01L31/0232 , H01S5/00 , H04B10/25 , H04B10/2507
摘要： PURPOSE:To obtain the WDM module for bi-directional optical transmission which is small in size and enables high-speed modulation and has small crosstalk. CONSTITUTION:A module consists of a semiconductor laser 4 and a photodetecting element 9 for two directional couplers 11 and lambda1 consisting of thin film waveguides formed on a waveguide substrate 8. The sent signal from the laser 4 which has wavelength An is outputted to a fiber 17 from a slantingly cut end surface of the substrate 8 through a waveguide 12 which selectively transmits the signal with the wavelength lambda1. A received signal wave having wavelength lambda2 is made incident on the directional coupler 11, passed through a waveguide 13 which selectively transmits the lambda2 and reflected by a wavelength selective reflecting film 19 on the end surface of the substrate 8 which transmits the lambda1 and reflects the lambda2, and detected by the photodetecting element 20 through the waveguide 14 of the directional coupler 18. Return light from the fiber which has the wavelength lambda1 is cut off because of the wavelength selectivity of the waveguide 13 and reflecting film 19 and the photodetecting element removes stray light by a pinhole, so the crosstalk is small. Further, the return light with the lambda1 is reflected by the slanting surfaces of the slanting end surface 8a of substrate and a lens 7 and does not return to the laser.

10. 发明专利

JPH02199413A FUSION SPLICING TYPE OPTICAL COUPLER 失效
公开(公告)号：JPH02199413A
公开(公告)日：1990-08-07
申请号：JP2000089
申请日：1989-01-30
申请人： HITACHI CABLE
发明人： KUSUYAMA HIROYUKI
IPC分类号： G02B6/28
摘要： PURPOSE:To obtain the fusion splicing type optical coupler which can be protected after being fixed in a short time without spoiling optical characteristics during the manufacture by supporting a fusion-spliced part which has a tapered distribution coupling part on the smoothed surface of a rod type reinforcing body at optical fiber parts on both sides of the fusion-spliced part. CONSTITUTION:Optical fibers 1 are inserted into a split pipe 12 and their coated optical fiber parts are drawn while heated from outside the pipe 12 and twisted to form the fusion-spliced part 10 which has the tapered distribution coupling part. Then a glass rod 11 which has a coefficient of heat expansion nearly equal to that of the optical fibers 1 and is inserted into the pipe 12 so that both ends project slightly from the pipe 12; and the optical fibers 1 are positioned on the top surface of the glass rod 11 and brought into contact with the bottom surface in the pipe 12. Then the optical fiber parts on both sides of the fusion-spliced part 10 are fixed to the glass rod 11 with adhesives 13 and the glass rod 11 and pipe 12 are fixed with an adhesive 16 so that the fusion-spliced part 10 does not contact the glass rod 11.

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