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1. 发明专利

GB2257513A FIBER-OPTIC GYROSCOPE 未知
公开(公告)号：GB2257513A
公开(公告)日：1993-01-13
申请号：GB9213458
申请日：1992-06-24
申请人： HITACHI CABLE
发明人： TERAOKA TATSUO , HIRAMOTO YOSHIYUKI , SHIGA HIROKAZU , TOYA SHIGEO
IPC分类号： G01C19/72
摘要： A fiber-optic gyroscope unit comprises a base 51 which holds a light source module 52, a light receiving unit (detector) 53, an optical fiber coil 54, directional couplers 56 mounted on the base 51, a phase modulator 55 which includes a piezoelectric element, inside the optical fiber coil 54 and a polarizer 510 wound around the optical fiber coil 54. All these components are so arranged as not to extend out of the tetragonal cone OABCO* which defines its own unit region. Three identical fiberoptic gyroscope units are combined by connecting members 512, 513, 514 to form a single fiberoptic gyroscope to detect rotational angular velocities about three orthogonal axes.

2. 发明专利

DE4220725A1 未知
公开(公告)号：DE4220725A1
公开(公告)日：1993-01-07
申请号：DE4220725
申请日：1992-06-24
申请人： HITACHI CABLE
发明人： TERAOKA TATSUO , HIRAMOTO YOSHIYUKI , SHIGA HIROKAZU , TOYA SHIGEO
IPC分类号： G01C19/72

3. 发明专利

DE4030291A1 未知
公开(公告)号：DE4030291A1
公开(公告)日：1991-04-04
申请号：DE4030291
申请日：1990-09-25
申请人： HITACHI CABLE , NIPPON KOKAN KK
发明人： TOYA SHIGEO , HIRAMOTO YOSHIYUKI , SASAKI KOJI , ABE KOICHI , TERAOKA TATSUO , SHIGA HIROKAZU , YOSHIE YASUNORI
IPC分类号： G02B6/255 , G02B6/36 , G02B6/38 , G02B6/44
摘要： Metal pipes containing optical fibers are connected to each other directly or indirectly by use of a sleeve. In case of using the sleeve, the sleeve is connected at one end to one of the metal pipes, after the optical fibers are connected. Then, the sleeve is elongated by a predetermined length, so that the sleeve is connected at the other end to the other metal pipe. Consequently, no tensile stress resides in the connected optical fibers in the connected structure. When the metal pipes are connected directly to each other, one or both of the metal pipes are elongated, after the optical fibers are connected. Then, the metal pipes are connected by used of the elongated portions. Consequently, the same result is obtained as using the sleeve.

4. 发明专利

GB2257513B Fiber-optic gyroscope 未知
公开(公告)号：GB2257513B
公开(公告)日：1995-06-28
申请号：GB9213458
申请日：1992-06-24
申请人： HITACHI CABLE
发明人： TERAOKA TATSUO , HIRAMOTO YOSHIYUKI , SHIGA HIROKAZU , TOYA SHIGEO
IPC分类号： G01C19/72 , G01C19/64

5. 发明专利

GB2205828A METHODS OF MANUFACTURING POLARISATION-MAINTAINING OPTICAL FIBRES 未知
公开(公告)号：GB2205828A
公开(公告)日：1988-12-21
申请号：GB8800275
申请日：1988-01-07
申请人： HITACHI CABLE
发明人： KAJIOKA HIROSHI , YAMADA KOUDO , TAKUMA YUUETSU , TERAOKA TATSUO
IPC分类号： C03B37/014 , C03B37/027 , C03B37/018
摘要： Two opposite portions of the surface of a core rod whose section is circular are removed by machining in the longitudinal direction thereof, so that the section of the core rod is transformed into a non-circular shape. On the surface of the thusly shaped non-circular core rod, glass particulates are accumulated, and then the glass particulates accumulated on the core rod are sintered to create a preform. Then, the preform is heated and drawn, so that a polarization-maintaining optical fiber of non-circular section is obtained.

6. 发明专利

CA2315458C OPTICAL WAVELENGTH MULTIPLEXER/DEMULTIPLEXER 未知
公开(公告)号：CA2315458C
公开(公告)日：2008-06-03
申请号：CA2315458
申请日：2000-08-09
申请人： HITACHI CABLE
发明人： MARU KOICHI , UETSUKA HISATO , NOUNEN HIDEKI , TERAOKA TATSUO , OKAWA MASAHIRO
IPC分类号： H04J14/02 , G02B6/12 , G02B6/34
摘要： An optical wavelength multiplexer/demultiplexer including a substrate, an input channel waveguide provided on the substrate, an input slab waveguide of which one end is connected to the input channel waveguide, a channel waveguide array of which one side is connected to the other side of the input slab waveguide and which has a plurality of channel waveguides, the plurality of channel waveguides each of which differs in length from its neighboring waveguide by redetermined amount, an output slab waveguide of which one side is connected to the other side of the channel waveguide array, and a plurality of output channel waveguides which are connected to the other side of the output slab waveguide, said input slab waveguide or output slab waveguide having a temperature compensation material, in its light path, having an opposite sign of diffraction temperature change to the plurality of channel wave guides, a material capable of canceling change in in-phase plane of light having each wavelength which occurs on a vicinity of the channel waveguide array and the slab waveguide, the material being provided in the curved form so that it may cross the light traveling direction, or a waveguide element for band width adjustment on which a waveguide to adjust band width of wavelength multiplexinglight is provided. According to the optical wavelength multiplexer/demultiplexer of the invention, the following advantages can be obtained; an angle in the in-phase plane of output light in the channel waveguide array is not changed regardless of the temperature change around the channel waveguide array, the increase of the loss is restrained, the most optimized spectrum response is provided, a setting of the center wavelength is finely adjusted, the electric field distribution is most optimized, the band width is expanded, the flatter loss is reduced, and the cross-talk is reduced.

7. 发明专利

DE4030291C2 未知
公开(公告)号：DE4030291C2
公开(公告)日：2002-10-31
申请号：DE4030291
申请日：1990-09-25
申请人： HITACHI CABLE , OCC CORP
发明人： TOYA SHIGEO , HIRAMOTO YOSHIYUKI , SASAKI KOJI , ABE KOICHI , TERAOKA TATSUO , SHIGA HIROKAZU , YOSHIE YASUNORI
IPC分类号： G02B6/255 , G02B6/36 , G02B6/38 , G02B6/44
摘要： Metal pipes containing optical fibers are connected to each other directly or indirectly by use of a sleeve. In case of using the sleeve, the sleeve is connected at one end to one of the metal pipes, after the optical fibers are connected. Then, the sleeve is elongated by a predetermined length, so that the sleeve is connected at the other end to the other metal pipe. Consequently, no tensile stress resides in the connected optical fibers in the connected structure. When the metal pipes are connected directly to each other, one or both of the metal pipes are elongated, after the optical fibers are connected. Then, the metal pipes are connected by used of the elongated portions. Consequently, the same result is obtained as using the sleeve.

8. 发明专利

DE4220725C2 未知
公开(公告)号：DE4220725C2
公开(公告)日：1998-04-09
申请号：DE4220725
申请日：1992-06-24
申请人： HITACHI CABLE
发明人： TERAOKA TATSUO , HIRAMOTO YOSHIYUKI , SHIGA HIROKAZU , TOYA SHIGEO
IPC分类号： G01C19/72

9. 发明专利

DE69535427D1 未知
公开(公告)号：DE69535427D1
公开(公告)日：2007-05-03
申请号：DE69535427
申请日：1995-09-04
申请人： HITACHI LTD , HITACHI CABLE
发明人： KATO TAKESHI , TERAOKA TATSUO , KIKUCHI SATORU , AOKI MASAHIRO , OSHIDO YOSHITADA
IPC分类号： G02B6/42 , G02B6/122 , G02B6/30 , H01L33/20 , H01L33/62 , H01S3/00 , H01S5/00 , H01S5/022
摘要： An optical assembly (1) has a substrate (20) and an optical device chip (10). On mutually opposed surfaces (11, 21) of the optical device chip and the substrate, indexes (12, 22) having slope faces are formed. Index passive alignment is performed by using the indexes as positioning reference and by using image measurement.

10. 发明专利

CA2315458A1 OPTICAL WAVELENGTH MULTIPLEXER/DEMULTIPLEXER 未知
公开(公告)号：CA2315458A1
公开(公告)日：2001-02-10
申请号：CA2315458
申请日：2000-08-09
申请人： HITACHI CABLE
发明人： NOUNEN HIDEKI , TERAOKA TATSUO , OKAWA MASAHIRO , MARU KOICHI , UETSUKA HISATO
IPC分类号： G02B6/12 , G02B6/34 , H04J14/02
摘要： An optical wavelength multiplexer/demultiplexer including a substrate, an input channel waveguide provided on the substrate, an input slab waveguide of which one end is connected to the input channel waveguide, a channel waveguide array of which one side is connected to the other side of the input slab waveguide and which has a plurality of channel waveguides, the plurality of channel waveguides each of which differs in length from its neighboring waveguide by redetermined amount, an output slab waveguide of which one side is connected to the other side of the channel waveguide array, and a plurality of output channel waveguides which are connected to the other side of the output slab wave guide, said input slab waveguide or output slab waveguide having a temperature compensation material, in its light path, having an opposite sign of diffraction temperature change to the plurality of channel wave guides, a material capable of canceling change in in-phase plane of light having each wavelength which occurs on a vicinity of the channel waveguide array and the slab waveguide, the material being provided in the curved form so that it may cross the light traveling direction, or a waveguide element for band width adjustment on which a waveguide to adjust band width of wavelength multiplexing light is provided. According to the optical wavelength multiplexer/demultiplexer of the invention, the following advantages can be obtained; an angle in the in-phase plane of output light in the channel waveguide array is not changed regardless of the temperature change around the channel waveguide array, the increase of the loss is restrained, the most optimized spectrum response is provided, a setting of the center wavelength is finely adjusted, the electric field distribution is most optimized, the band width is expanded, the flatter loss is reduced, and the cross-talk is reduced.

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