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81. 发明专利

JPH06207883A APPARATUS FOR MEASURING OPTICAL CONNECTER REFLECTION LOSS 失效
公开(公告)号：JPH06207883A
公开(公告)日：1994-07-26
申请号：JP342093
申请日：1993-01-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI MASARU , KUWAKI NOBUO , YOSHIDA KOJI
IPC分类号： G01M11/00 , G01M11/02
摘要： PURPOSE:To provide a low cost measuring device with a simple optical system capable of measuring a reflection loss of only an edge face of an optical connecter to be measured with a high measuring limit. CONSTITUTION:An emitted light from a light source 1 of a Fabry-Perot type laser diode is divided into a measurement light and a reference light. The measurement light is introduced into an optical connecter 4 to be measured connected to a master optical connecter 3 of which distance from a branching point of an optical fiber coupler 2 is regulated with a slightly rough accuracy in advance so that a reflected light reflected at an optical connecter-connecting section and the reference light are combined. A propagation optical path length of the reflected light and reference light is expanded or shortented at an optical fiber expansion/contraction section 8 to be adjusted so that they are brought into interference. The intensity of amplitude of the interference signal is measured so that signals in proportion with the reflection coefficients of the master optical connecter and the optical connecter 4 to be measured are surely obtained, thereby obtaining a reflection loss.

82. 发明专利

JPH06194265A APPARATUS FOR MEASURING REFLECTION ATTENUATION OF OPTICAL CONNECTER 失效
公开(公告)号：JPH06194265A
公开(公告)日：1994-07-15
申请号：JP34415892
申请日：1992-12-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI MASARU
IPC分类号： G01J1/02 , G01J11/00 , G01M11/00 , G02B6/00
摘要： PURPOSE:To measure a reflection attenuation quantity in a short time by utilizing a speaker as a driving source for expanding or contracting a fiber. CONSTITUTION:An optical fiber 11 to be expanded or contracted is fixed to an optical fiber fixing section 13 at two positions by means of a bonding agent 14 by leaving a part in the specific length, e.g. about 70cm. The part of specific length of the optical fiber 11 is strained in parallel by means of a circular optical fiber support member 12. A vibration section of a speaker 15 is fixed to the optical fiber fixing section 13. The speaker 15 is driven by an oscillator 16 with a voltage having a saw-tooth-wave or a triangle wave. Therefore, the optical fiber 11 is expanded or contracted by means of the speaker 15 and the length of the optical fiber which is expanded or contracted is twice the amplitude of the speaker 15. The speaker 15 may have a rated input of about 10 W and the oscillator 16 may have a maximum output of about 10 VX1 A so that it is possible to generate well enough a strain force of 1 N. Thus, it is possible to measure a reflection attenuation quantity in a short time.

83. 发明专利

JPH05215976A OPTICAL SWITCH 失效
公开(公告)号：JPH05215976A
公开(公告)日：1993-08-27
申请号：JP1756792
申请日：1992-02-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI MASARU
IPC分类号： G02B6/28 , G02B26/08
摘要： PURPOSE:To provide the optical switch having a self holding property without having disconnection time by providing means for bending and restoring an optical coupling part along the longitudinal direction of two pieces of optical fibers. CONSTITUTION:The optical coupling part is formed by polishing the flanks of the optical fibers 1, 2 or fusing and stretching these fibers by heat over a certain length of several 10mm thereby narrowing the spacing between the two fibers to several 10mum. The optical coupling part is coated with a coating material having the refractive index lower than the refractive index (about 1.45) of the cladding layers of the optical fibers. The light propagated in the optical fibers is not coupled at several 10mm coupling length and several 10mum spacing between the cores 4 and the incident light from the optical fiber 1 is emitted from the optical fiber 1 as it is, if the optical fiber pair which is the optical coupling part is in a straight state. The light propagated in the optical fiber 1 is bled to the optical fiber 2 side by the curvature and the effective inter-core spacing is narrowed if the optical coupling part is bent at a curvature to the optical fiber 1 side. Then, the direction and quantity of bleeding of the propagated light are controlled by the bending and restoring of the optical coupling part.

84. 发明专利

JPH02140638A BACKSCATTERING LIGHT MEASURING INSTRUMENT 失效
公开(公告)号：JPH02140638A
公开(公告)日：1990-05-30
申请号：JP29413488
申请日：1988-11-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKADA KAZUMASA , NODA JUICHI , KOBAYASHI MASARU , UCHIDA NAOYA
IPC分类号： G01N21/49 , G01M11/00
摘要： PURPOSE:To attain measurement of the backscattering light generated in an optical waveguide to be measured in a signal-to-noise ratio by providing a fiber type photocoupler, a total reflection mirror and the optical waveguide. CONSTITUTION:An emitted light from a light source 1 is divided into two by a fiber type photocoupler 2, and one of them is utilized as a reference light. This reference light becomes parallel beams by an objective lens 17, reflected by a total reflection mirror 3 and made incident on the coupler 2 through the lens 17 again. Subsequently, the reflection mirror 3 moves in the beam direction, and by giving successively a delay time, the optical frequency of the reference light is deviated a little. The other light which is divided into two passes through a fiber type phase modulator 4 and made incident on the optical waveguide 5. Also, a backscattering light generated in the optical waveguide 5 passes through the modulator 4 again and made incident on the coupler 2, and multiplexed with the reference light. This multiplexed light becomes parallel beams by an objective lens 7 and made incident on a photodetector 28. The output of the detector 28 passes through a mixer circuit 36 and stored in a waveform memory 29.

85. 发明专利

JP2006350130A OPTICAL CONNECTOR END FACE MACHINING METHOD, OPTICAL FIBER CUTTER, AND OPTICAL CONNECTOR END FACE MACHINING APPARATUS 审中-公开
公开(公告)号：JP2006350130A
公开(公告)日：2006-12-28
申请号：JP2005178414
申请日：2005-06-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MATSUI SHINSUKE , ISHIKAWA YOSHIYUKI , OKI SHIGEHISA , YANAGI SHUICHI , NAGASE AKIRA , KOBAYASHI MASARU
IPC分类号： G02B6/36 , B24B19/00 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide an optical connector end face machining method that makes simple and accurate machining possible, and also to provide an optical fiber cutter and an optical connector end face machining apparatus. SOLUTION: In storing an optical fiber 2 in a ferrule 3, no adhesive is applied to a part of the optical fiber 2 projected from the end face of the ferrule 3. Instead, there are provided a first process in which the projected part of the optical fiber 2 is cut off to remove the resultant folded part of the optical fiber 2 and a second process in which the end face of the optical fiber 2 is mirror-finished to remove the resultant degenerated layer from the machining. COPYRIGHT: (C)2007,JPO&INPIT

86. 发明专利

JP2002258064A OPTICAL FIBER WIRING BOARD AND WIRING METHOD USING IT 失效
公开(公告)号：JP2002258064A
公开(公告)日：2002-09-11
申请号：JP2001059546
申请日：2001-03-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI MASARU , HIRAYAMA MAMORU , ABE YOSHITERU , SUMITA MAKOTO
IPC分类号： G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber wiring board and a wiring method using it in which packaging is efficiently performed with a high density and without any congestion. SOLUTION: The end part sides of sheets 153 and 253 of the optical fiber wiring boards 150 and 250 are positioned between sub racks 30 adjacent in the vertical direction within a rack 20 so as not to disturb inserting/drawing movement of the package 140 by using a U shaped optical fiber wiring board 150 and linear optical fiber wiring boards 250, and also the optical fiber wiring boards 150 and 250 are oriented while bending the sheets 153 and 253 of the optical fiber wiring boards 150 and 250 so as to position the middle parts of the sheets 153 and 253 of the optical fiber wiring boards 150 and 250 to the side surface side of the rack 20, and optical fiber connector receptacles 144 of respective packages 140 are respectively connected to optical fiber connector plugs 152 of respective optical fiber wiring boards 150 and 250.

87. 发明专利

JP2002006144A DEVICE FOR REMOVING COAT FOR COATED OPTOCAL FIBER RIBBON AND METHOD FOR REMOVING COAT 失效
公开(公告)号：JP2002006144A
公开(公告)日：2002-01-09
申请号：JP2000187233
申请日：2000-06-22
申请人： SHOWA ELECTRIC WIRE & CABLE CO , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIRAISHI KEIKO , SAKAKIBARA MASAKI , MURASE TOMOTAKA , YOSHIDA TAKUJI , KOBAYASHI MASARU , SUMITA MAKOTO
IPC分类号： G02B6/00 , H02G1/12
摘要： PROBLEM TO BE SOLVED: To provide a device for removing the coat of a coated optical fiber ribbon 1 that comprises the pressure groove-forming means which comprises a pair (upper and under) of function boards 3 having curved surfaces at their front ends, the coat-gripping means which grips the coat part on a terminal side with a pair (upper and under) of coat-gripping boards 4, and the pulling means for pulling out the coat part; and also a method for removing the coat by the use of the above device. SOLUTION: It is possible to remove the coat without any damage to the coated optical fiber ribbon 1, since the pressure groove is formed by the function boards 3 which have the curved surfaces at their front ends.

88. 发明专利

JP2001305390A OPTICAL FIBER CONNECTOR 失效
公开(公告)号：JP2001305390A
公开(公告)日：2001-10-31
申请号：JP2000116151
申请日：2000-04-18
申请人： TYCO ELECTRONICS AMP KK , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI SHIGERU , HAYASHI TAKEHIRO , YOSHIDA TAKUJI , KOBAYASHI MASARU , ABE YOSHITERU , SUMITA MAKOTO
IPC分类号： G02B6/38
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber connector for connecting optical fibers with each other, which can surely perform alignment and connection between optical fibers without damaging the fibers. SOLUTION: The optical fiber connector 1 is equipped with a pair of plugs 2, 2 for fixing an optical fiber A and with an adaptor 3 which is arranged outside the pair of plugs 2, 2 when the plugs are made to face each other and be fitted to each other. The pair of plugs 2, 2 are each provided with an aligning member 50. The aligning member 50 is designed such that it elastically clamps the free end of the optical fiber A located in the cavity 15b of the plug 2, and aligns it to an arraying hole 94. When the pair of plugs 2, 2 are each accepted in the receptacles 71, 71 of the adaptor 3 and the optical fiber A is inserted into the arraying hole 94, the aligning member 50 is separated away from the optical fiber A by the arraying member 90.

89. 发明专利

JP2001305383A DEVICE AND METHOD FOR HOLDING OPTICAL FIBER 失效
公开(公告)号：JP2001305383A
公开(公告)日：2001-10-31
申请号：JP2000116149
申请日：2000-04-18
申请人： TYCO ELECTRONICS AMP KK , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI SHIGERU , HAYASHI TAKEHIRO , YOSHIDA TAKUJI , KOBAYASHI MASARU , ABE YOSHITERU , SUMITA MAKOTO
IPC分类号： G02B6/36
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber holding device and method that realize a high positional accuracy in the axial direction of an optical fiber and that facilitate the fixing and pressurizing operations for an optical fiber. SOLUTION: The optical fiber holding device is equipped with a core member 10 having a plate 11 with a groove 12 for accepting an optical fiber A, fiber holder members 21, 22, 23 arranged on the plate 11 of the core member 10, and a housing 30 for storing the core member 10 and the fiber holder members 21, 22, 23. Wedge members 41, 42, 43 are inserted between the housing 30 and the fiber holder members 21, 22, 23, in the direction orthogonally crossing the optical axis direction of the optical fiber A. As a result, the optical fiber A accepted in the fiber accepting groove 12 is fixed in a pressurized manner by the fiber holder members 21, 22, 23.

90. 发明专利

JP2001013330A SIMPLE TAPING METHOD FOR OPTICAL FIBER AND METHOD FOR LAYING OPTICAL FIBER 失效
公开(公告)号：JP2001013330A
公开(公告)日：2001-01-19
申请号：JP18438899
申请日：1999-06-29
申请人： SHOWA ELECTRIC WIRE & CABLE CO , NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAGUCHI TOMOYO , SUZUKI SHIGERU , HORI TAKAKO , SHIRAISHI KEIKO , KOBAYASHI MASARU , YOSHIDA TAKUJI , ARISHIMA KOICHI , SUMITA MAKOTO
IPC分类号： G02B6/44 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To improve the workability and reliability of installation work of plural optical fibers by applying a photosetting type resin like a tape to a parallel part where the plural optical fibers are partially paralleled, the irradiating the resin with light to integrally cure the resin. SOLUTION: The optical fibers 1a to 1d of the same kind or different kinds which are mounted with connectors 2 at both terminals for the purpose of connection to a substrate, etc., and respectively have required lengths and outside diameters are partially and properly aggregated and taped at one or plural points and are then connected to the substrate, etc. Namely, the partially aggregated optical fibers 1 are paralleled and their both ends are fixed to fixing jigs and tension jigs by tacky adhesive tapes. Suitable tension is thereafter applied to the optical fibers 1 and in this state the photosetting type resin is applied like the tape to the part where the optical fibers 1 between both jigs are paralleled by using a die packed with the photosetting type resin or cloth, etc., impregnated with the photosetting type resin and is integrally cured by irradiating the photosetting type resin with the light.

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