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1. 发明专利

JPH0951308A OPTICAL COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH0951308A
公开(公告)日：1997-02-18
申请号：JP21666195
申请日：1995-08-02
申请人： FURUKAWA ELECTRIC CO LTD , TOKYO ELECTRIC POWER CO
发明人： HIGAMI TOSHIYA , NEGAMI SHOICHI , TAWARA MASAFUMI , WATANABE TAKEMOTO , KAMIYA ISAMU
IPC分类号： H04B10/516 , H04B10/2507 , H04B10/275 , H04B10/54 , H04B10/61 , H04B10/152 , H04B10/02 , H04B10/04 , H04B10/06 , H04B10/142 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To realize communication with a satisfactory CN ratio even in long distance transmission by varying a resonance frequency in the optical transmission line of an optical external modulator from a resonance frequency in an optical fiber transmission line. SOLUTION: Since video signal light is transmitted with a frequency different from the frequency of phase noise occurring in the optical fiber transmission line 2 and by a frequency band resonating in the resonance frequency band of the optical external modulator 5, the video carrier frequency of a first TV modulator 11 (11a) from the transmission side of a system is set to 218MHz, for example. The video carrier frequency of a second TV modulator 11 (11b) is set to 401MHz, for example, so as to operate the optical external modulators 5 (5a and 5b). Thus, a noise floor can be reduced by about 10dB compared to a conventional system in which the acoustic frequency of the optical fiber transmission line 2 does not differ from that of the optical external modulator 5 so as to improve the CN ratio.

2. 发明专利

JPH07162370A METHOD AND DEVICE FOR RECEIVING POLARIZATION MODULATED LIGHT AND LIGHT RECEIVING EQUIPMENT 失效
公开(公告)号：JPH07162370A
公开(公告)日：1995-06-23
申请号：JP33969193
申请日：1993-12-06
申请人： FURUKAWA ELECTRIC CO LTD
发明人： HIGAMI TOSHIYA , NEGAMI SHOICHI , MURATA MATSUE , NISHIKAWA SHIGEAKI
IPC分类号： G02B6/00 , G02B6/34 , G02F1/01 , H04B10/516 , H04B10/532 , H04B10/54 , H04B10/564 , H04B10/61 , H04B10/152 , H04B10/04 , H04B10/06 , H04B10/142
摘要： PURPOSE:To make it possible to detect a modulated output even when an analyzer is fixed by branching polarization modulated light, and receiving intensity modulated light made to pass through one analyzer after the branched modulated light is made to pass through a specific phase element and intensity modulated light made to pass through other analyzers. CONSTITUTION:Polarization modulated light obtained by changing the polarized face of light propagated in an optical fiber 1 in accordance with a modulation signal is converted into spatial light through a collimater lens 14 arranged on the input side of a light receiving part 4, the spatial light is branched to transmitted light and reflected light by a branch 5a, and the reflected light is further branched to transmitted light and reflected light, so that the original light is branched three times in all. One of three branched polarization modulated light is successively passed through a pi/2 phase element (e.g. 1/4 wavelength plate) 2 and an analyzer 3a, the other two are respectively made to pass through analyzers 3b, 3c without making them pass through a pi/2 phase element and each intensity modulated light obtained by making spatial light incident upon the fiber 1 through the lens 14 is converted into an electric signal by an O/E converter 15 and a selector circuit 16 outputs a wave having the highest signal level out of three inputted waves.

3. 发明专利

JPH06230332A EXTERNAL OPTICAL MODULATOR 失效
公开(公告)号：JPH06230332A
公开(公告)日：1994-08-19
申请号：JP3259093
申请日：1993-01-29
申请人： FURUKAWA ELECTRIC CO LTD
发明人： NEGAMI SHOICHI , HIGAMI TOSHIYA , MURATA MATSUE , NISHIKAWA SHIGEAKI
IPC分类号： G02B6/00 , G02B26/02 , G02F1/11
摘要： PURPOSE:To provide the external optical modulator which can transmit much information with the single external optical modulator and saves the occupation space for a modulation system. CONSTITUTION:A piezoelectric element part 5 formed by laminating a lower electrode 2, a piezoelectric film 3, and an upper electrode 4 in order is provided on one of the top and reverse surfaces of a substrate 1 which has nearly the same acoustic impedance with the clad layer of an optical fiber, the optical fiber 6 is fixed right above or below the part where the lower electrode 2, piezoelectric film 3, and upper electrode 4 overlap on one another in an optional surface between the top and reverse surfaces of the substrate 1, and plural upper electrodes 4 are provided on the piezoelectric film 3.

4. 发明专利

JPH01212740A HEAT TREATMENT FOR SHAPE MEMORY SPRING FOR ELECTRONIC CONNECTOR 失效
公开(公告)号：JPH01212740A
公开(公告)日：1989-08-25
申请号：JP3385088
申请日：1988-02-18
申请人： FURUKAWA ELECTRIC CO LTD
发明人： HIGAMI TOSHIYA , YOSHIDA KOJI , OBARA YUICHI , FUSE KENICHI
IPC分类号： C22F1/10 , C22C19/03
摘要： PURPOSE:To maintain characteristics equal to those in the initial stage even after repeated use by subjecting a shape memory spring to shape memory heat treatment and then applying heat treatment removing initial generation power to the above. CONSTITUTION:Shape memory treatment is applied to a shape memory spring consisting of Ni-Ti alloy, etc. Both ends of the resulting U-shaped shape memory spring 8 are inserted into grooves 9A, 9B of a jig 9 and heated in a state where the above spring 8 is provided with the prescribed displacement in the same direction as in the service condition and constrained to undergo inverse transformation, which is air-cooled and subjected to a heat cycle causing martensitic transformation once or plural times. Then, the shape memory spring is detached from the jig 9. By this method, the heat treatment of a shape memory spring for electronic connector in which adverse effects due to repeated use are inhibited can be carried out.

5. 发明专利

JPS63304583A ELECTRONIC CONNECTOR 失效
公开(公告)号：JPS63304583A
公开(公告)日：1988-12-12
申请号：JP13893687
申请日：1987-06-04
申请人： FURUKAWA ELECTRIC CO LTD
发明人： HIGAMI TOSHIYA , YOSHIDA KOJI , OBARA YUICHI , FUSE KENICHI
IPC分类号： H01R13/193 , H01R4/01 , H01R13/03 , H01R24/00
摘要： PURPOSE:To facilitate initial checking or the like during no operation of a shape-memory spring by using a strong spring part and a weak spring part to form contacts with the shape-memory spring serving as an actuator. CONSTITUTION:Contacts 4, 5 fixed to face each other in a contact housing 2 are shaped in similar figures, and an opposite contact 6 is supported in between. The contact 4 is structured to connect a strong spring part 4E on a tip of a weak spring part 4D. The strong spring part 4E is supported on a shape-memory spring 10 through an insulator 11. The shape-memory spring 10 is not actuated at initial connection and the opposite contact 6 is supported with small supporting strength on the weak spring part 4D and so initial checking or the like is easily performed. When the connection causes a temperature to attain to a prescribed value, the shape-memory spring 10 is operated to generate a prescribed value of supporting strength through the strong spring part 4E.

6. 发明专利

JPS6372080A ELECTRONIC CONNECTOR 失效
公开(公告)号：JPS6372080A
公开(公告)日：1988-04-01
申请号：JP21513386
申请日：1986-09-12
申请人： FURUKAWA ELECTRIC CO LTD
发明人： HIGAMI TOSHIYA , YOSHIDA KOJI , OBARA YUICHI , FUSE KENICHI
IPC分类号： H01R24/00

7. 发明专利

JP2003243573A MULTILAYER SUBSTRATE AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2003243573A
公开(公告)日：2003-08-29
申请号：JP2002045009
申请日：2002-02-21
申请人： FURUKAWA ELECTRIC CO LTD
发明人： HIGAMI TOSHIYA , OSHIMA HIROFUMI
IPC分类号： H05K1/11 , H01L23/12 , H05K3/40 , H05K3/46
摘要： PROBLEM TO BE SOLVED: To provide a multilayer substrate, and its manufacturing method, in which failure of bonding is suppressed in a manufacturing process and troubles are suppressed at the time of secondary mounting. SOLUTION: The multilayer substrate 1 comprises an insulating resin layer 11a, an insulating resin layer 11b formed on the insulating resin layer 11a and provided with through holes, a conductor circuit pattern 12a interposed between the insulating resin layers 11a and 11b, a conductor circuit pattern 12b provided on the surface of the insulating resin layer 11b not facing the conductor circuit pattern 12a, connection conductors 13b filling the through holes, and bonding conductors 14 interposed between the connection conductors 13b and the conductor circuit pattern 12a and having a melting point lower than that of the connection conductor 13b, wherein each boundary between the connection conductor 13b and the bonding conductor 14 is located in the same plane as the surface of the insulating resin layer 11b not provided with the conductor circuit pattern 12b or located closer to the conductor circuit pattern 12b. COPYRIGHT: (C)2003,JPO

8. 发明专利

JPH09145770A ACCIDENT POINT SPOTTING DEVICE FOR TRANSMISSION LINE 失效
公开(公告)号：JPH09145770A
公开(公告)日：1997-06-06
申请号：JP32804795
申请日：1995-11-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： HIGAMI TOSHIYA , NEGAMI SHOICHI , MURATA MATSUE , NISHIKAWA SHIGEAKI
IPC分类号： G01R31/08
摘要： PROBLEM TO BE SOLVED: To spot the accident point of a transmission line caused by a thunderbolt from a substation by detecting the surge current generated by the thunderbolt with a detection coil incorporated in a thunderbolt detecting sensor and impressing a detecting signal larger than a threshold upon the optical fiber of an optical fiber composite overhead ground wire after modulating the plane of polarization of the signal. SOLUTION: When a steel tower A2 provided with no thunderbolt detecting sensor 2 is struck by lightning, a surge current flows toward steel towers A1 and A5 through an optical fiber overhead ground wire 1 and a secondary current is generated in a detection coil 3 incorporated in the sensor 2 and inputted to a drive circuit 4. The circuit 4 counts 12 the detecting time of secondary current the output level of which is higher than a threshold, binarizes 14 the counted detecting time, oscillates 15 the signal carrying the information, and impresses the signal upon an optical fiber 5 in a ground wire after modulating the plane of polarization of the signal by means of an external light modulating section 6. At a substation, the distribution of the surge current in a transmission line is found upon receiving the signal and specifies the steel tower A2 struck by lightning. Therefore, even when steel towers A2 -A4 are struck by lightning, the towers can be specified with sensors 2 near the towers.

9. 发明专利

JPH08125637A RECEPTION METHOD FOR FREQUENCY MULTIPLEX POLARIZED PLANE MODULATION LIGHT AND RECEIVER USED FOR IT 失效
公开(公告)号：JPH08125637A
公开(公告)日：1996-05-17
申请号：JP28434394
申请日：1994-10-24
申请人： FURUKAWA ELECTRIC CO LTD , TOKYO ELECTRIC POWER CO
发明人： HIGAMI TOSHIYA , NISHIKAWA SHIGEAKI , KAMIYA ISAMU , WATANABE TAKEMOTO
IPC分类号： G02F2/00 , H04J14/00 , H04J14/02
摘要： PURPOSE: To realize the reception method of a polarized plane modulation light in which a modulation output is obtained without fail even when an analyzer is fixed and the receiver for it. CONSTITUTION: A frequency multiplex polarized plane modulation light subject to polarized plane modulation obtained from a light propagated through an optical fiber 1 by an external optical modulator is distributed into three by a receiver side and fed to three distributed paths 3a-3c, and a polarized plane modulation light sent to one distribution path 3a is given to a 1st analyzer 5a through a π/2 phase shifter 4 and the polarized plane modulation light fed to the other two distribution paths 3b, 3c is given to 2nd and 3rd analyzers 5b, 5c not through the π/2 phase shifter 4 and an intensity modulation light passing through the analyzers 5a-5c are given to O/E converters 6a-6c, in which the light is converted into an electric signal. Then each electric signal is discriminated into a frequency component corresponding to a frequency of the external optical modulator 2 and the electric signal of any of the distribution paths 3a-3c with highest modulation output for each frequency component is selected and received.

10. 发明专利

JPH07175024A OPTICAL EXTERNAL MODULATOR 失效
公开(公告)号：JPH07175024A
公开(公告)日：1995-07-14
申请号：JP15536394
申请日：1994-06-14
申请人： FURUKAWA ELECTRIC CO LTD
发明人： NEGAMI SHOICHI , HIGAMI TOSHIYA , NISHIKAWA SHIGEAKI , MURATA MATSUE
IPC分类号： G02F1/01
摘要： PURPOSE:To make it possible to perform the modulation of the polarization plane of incident light even if the polarization state of light is not adjusted by changing the phase difference between the X component and Y component of the light propagating an optical transmission path by a specific quantity. CONSTITUTION:A phase changing part 8 for changing the phase difference of the propagating light by (2m-1)*pi/2 (m is a positive integer) is arranged between the optical transmission paths of two polarization plane modulating sections 11. The incident light on the polarization plane modulating part 11 of the forward side (front side) in the propagation direction of the light is changed into circularly polarized light by passing the phase changing part 8 and is made incident in this polarization state on the polarization plane modulating part 11 in the rear side (rear stage) of the propagation direction of the light when the incident light described above is a linearly polarized light having the axis of polarization horizontal or perpendicular to the direction where the stress is impressed on the light transmission path. The phase difference deviates while the light propagates the phase changing part 8 and changes to the linearly polarized light having the axis of polarization horizontal or perpendicular to the direction where the stress is applied on the light propagation path when the circularly polarized light is made incident from the left. The light propagated by either is always subjected to the polarization plane modulation in such a manner.

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