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31. 发明专利

JP2003254798A SENSOR SENSITIVITY OF DYNAMIC RANGE SETTING METHOD USING FBG 审中-公开
公开(公告)号：JP2003254798A
公开(公告)日：2003-09-10
申请号：JP2002056687
申请日：2002-03-04
申请人： FURUKAWA ELECTRIC CO LTD
发明人： FURUKAWA KAZUNARI , IZUMO MASAKI
IPC分类号： G01D21/00 , G01D21/02
摘要： PROBLEM TO BE SOLVED: To make the sensor sensitivity or the dynamic range easily settable according to a performance requirement in a sensor comprising an FBG (optical fiber Bragg diffraction grating) 14 provided on a tensile face of a bending member 10, wherein the amount of deflection thereof changes by the amount of a physical quantity. SOLUTION: Optical fibers 16 located at the both sides of the FBG 14 are fixed to the bending member 10 by fixing blocks 20. The sensor sensitivity or a dynamic range is controlled by a height of the fixing block 20. COPYRIGHT: (C)2003,JPO

32. 发明专利

JP2003249898A OPTICAL TRANSMISSION LINE MONITORING SYSTEM 审中-公开
公开(公告)号：JP2003249898A
公开(公告)日：2003-09-05
申请号：JP2002046332
申请日：2002-02-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： KASUGA YUICHI , KAMIJO KOJI
IPC分类号： H04B10/07 , H04B10/071 , H04B10/077 , H04B10/275 , H04B17/00 , H04B10/08
摘要： PROBLEM TO BE SOLVED: To accurately detect the section of an optical transmission line where a fault is generated, irrespective of whether the optical fiber is a single optical fiber or a plurality of branches. SOLUTION: In a system, wherein a wideband light source 23 is connected in series with a reflectionless processing part 14 via an optical fiber 11, a light from the light source 23 which travels the optical fiber 11 is branched by an optical coupler 32 in a closure 30. The branched light is made to pass a submergion sensor 31, and a specified wavelength only is reflected by an FBG 34, thereby monitoring the optical cable and detecting the fault section with a light wavelength measuring part 25. COPYRIGHT: (C)2003,JPO

33. 发明专利

JP2003249718A SEMICONDUCTOR LASER DEVICE, SEMICONDUCTOR LASER MODULE AND OPTICAL FIBER AMPLIFIER 审中-公开
公开(公告)号：JP2003249718A
公开(公告)日：2003-09-05
申请号：JP2002048679
申请日：2002-02-25
申请人： FURUKAWA ELECTRIC CO LTD
发明人： OKI YASUSHI , TSUKIJI NAOKI , YOSHIDA JIYUNJI
IPC分类号： G02B6/42 , B82Y20/00 , H01S3/10 , H01S5/12 , H04B10/07 , H04B10/29 , H04B10/294 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/02 , H04B10/16 , H04B10/17 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide a semiconductor laser device of high output. SOLUTION: A lower clad layer 2, a lower SCH layer 3, a quantum well layer 4, an upper SCH layer 5 and a first upper clad layer 6 are sequentially stacked on a substrate 1. A second upper clad layer 8 and a current block layer 9, which are in stripe shapes, are stacked on the first upper clad layer 6. A third upper clad layer 10 and a contact layer 11 are sequentially stacked. A p-side electrode 12 is arranged on the contact layer 11 and an n-side electrode 13 on the rear face of the substrate 1. The current block layer 9 has a conduction type different from the second upper clad layer 8. Thus, a current is constricted. The effective refractive index of a region including the current block layer 9 takes a value lower than that of a region including the upper clad layer 8. Thus, light is confined in a horizontal direction. A diffraction grating 7 is arranged inside the first upper clad layer 6, and it selects light having a plurality of oscillation vertical modes. COPYRIGHT: (C)2003,JPO

34. 发明专利

JP2003249286A PROTECTING METHOD FOR FLAT CABLE HAVING CONNECTOR AND PROTECTION STRUCTURE 审中-公开
公开(公告)号：JP2003249286A
公开(公告)日：2003-09-05
申请号：JP2002047624
申请日：2002-02-25
申请人： FURUKAWA ELECTRIC CO LTD
发明人： ENOMOTO KENJI , KAMIMURA MASARU , SAKATA KAZUMASA , SUZUKI YOSHIYUKI
IPC分类号： H01R4/70 , H01R12/38
摘要： PROBLEM TO BE SOLVED: To provide a protecting method for a flat cable having a connector, by which respective flat cable portions exposed from a connector housing can be effectively protected in a state that jointing terminals provided at free ends of the respective flat cable portions branched from a flat cable having a terminal have been inserted into terminal-receiving chambers vertically provided in the connector housing with the removal thereof preventing. SOLUTION: Parts of respective flat cable portions 3A, 3B exposed from a connector housing 10 are covered with a cylindrical protective material 18, and the protective material 18 is fixed to the respective flat cable portions 3A, 3B or a flat cable 3 at a position away from the connector housing 10, where no twisting force is applied to the respective flat cable portions 3A, 3B. COPYRIGHT: (C)2003,JPO

35. 发明专利

JP2003248133A OPTICAL FIBER FUSION SPLICING DEVICE 审中-公开
公开(公告)号：JP2003248133A
公开(公告)日：2003-09-05
申请号：JP2002050017
申请日：2002-02-26
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TANABE AKIO , YAMAMOTO KAZUNORI , HARADA SHINJI
IPC分类号： G02B6/255
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber fusion splicing device which realizes enlargement of a heating region and deflection of a discharge path with a simple device structure. SOLUTION: Deflecting control plates 20a and 20b are arranged where a pair of electrode plates are arranged so as to put a discharge path between them. By an impedance converting means 40, an impedance between an electrode plate and a grounding potential of both of them are switched alternately to the predetermined impedance, and also at the predetermined frequency. By this, the discharge path can be deflected toward the electrode plate alternately, and furthermore, the deflecting range of the discharge path, or the heating region can be enlarged by setting the predetermined impedance at the low enough value. COPYRIGHT: (C)2003,JPO

36. 发明专利

JP2003243975A LOAD CONTROL DEVICE 审中-公开
公开(公告)号：JP2003243975A
公开(公告)日：2003-08-29
申请号：JP2002035511
申请日：2002-02-13
申请人： FURUKAWA ELECTRIC CO LTD
发明人： YAGI MICHIHIRO , HARA SHOJI , TAKAHASHI HIROAKI , TSUTSUMI HIROSHI
IPC分类号： H03K17/00 , H03K17/296
摘要： PROBLEM TO BE SOLVED: To improve the productivity of a product using a load control device for controlling a load by detecting the operation of a small current switch and to reduce costs by stably controlling the load control device by a large current switch for directly controlling the load. SOLUTION: By eliminating the oxide film of a contact by providing a semiconductor switch interposed between a switch connected to one terminal of a power source and a load connected to the other terminal of the power source, a control means for controlling the conduction/cutoff of the semiconductor switch by detecting the operation of the switch and an electrification circuit to be electrified by the control means for a prescribed period for making a prescribed current flow to the contact when the switch is operated, the load control device can be controlled by the large current switch. Thus, in the case of control by the load control device, it is not necessary to selectively use the small current switch and the large current switch so that the productivity of the product using the load control device can be improved and the costs can be reduced. COPYRIGHT: (C)2003,JPO

37. 发明专利

JP2003243919A SMALL-SIZED ANTENNA 审中-公开
公开(公告)号：JP2003243919A
公开(公告)日：2003-08-29
申请号：JP2002338784
申请日：2002-11-22
申请人： FURUKAWA ELECTRIC CO LTD
发明人： TOMOMATSU ISAO , HAMADA HIROKI , SATO SHINJI , UENO TAKAHIRO
IPC分类号： H01Q1/40 , H01Q9/42
摘要： PROBLEM TO BE SOLVED: To provide a small-sized antenna, provided with an antenna element 14 having two meander patterns 14a, 14b whose meander directions are different, and a resin molded material 16 formed in a manner of embedding the antenna element, with a stable characteristic where deformation of the meander patterns hardly takes place at forming of the resin molded material. SOLUTION: A fillet portion 12 is provided in the inside of a corner portion T 1 , which is easily deformed during resin molding, among corner portions of the meander patterns 14a, 14b and chamfering is eliminated to thicken the width of conductor. Since frequency variations become greater if the corner portion T 2 , which is similarly easily deformed, is provided with the fillet portion and the chamfering is eliminated, no fillet portion is provided to the corner portion T 2 but the chamfering only is omitted, and the corner portion T 3 adjacent to the corner portion T 2 is provided with the fillet portion 12 and the chamfering is eliminated. COPYRIGHT: (C)2003,JPO

38. 发明专利

JP2003243063A CONNECTING PART OF DIFFERENT METAL TERMINALS 审中-公开
公开(公告)号：JP2003243063A
公开(公告)日：2003-08-29
申请号：JP2002036723
申请日：2002-02-14
申请人： FURUKAWA ELECTRIC CO LTD
发明人： NOGUCHI TAKAO
IPC分类号： C23F15/00 , H01R4/62
摘要： PROBLEM TO BE SOLVED: To provide a connecting part of different metal terminals capable of simply generating connection of different metal wires with each other while electrocorrosion between the two terminals is precluded, and, at the time of applying a plating to each terminal part, capable of attaching the plating in good workmanship to the part around the base of the terminal part. SOLUTION: Among a pair of terminals 1 and 2 made of different metals in which a compression part and the terminal part are formed consolidatedly, the terminal part 1B of one of them 1 is subjected to a plating 5, and this plated terminal part 1B of the terminal 1 is furnished at the base part with a groove 8 in the direction perpendicular to the axial direction of the metal terminal. COPYRIGHT: (C)2003,JPO

39. 发明专利

JP2003241001A DISPERSION COMPENSATING OPTICAL FIBER, OPTICAL FIBER MODULE, AND OPTICAL AMPLIFIER 审中-公开
公开(公告)号：JP2003241001A
公开(公告)日：2003-08-27
申请号：JP2002240646
申请日：2002-08-21
申请人： FURUKAWA ELECTRIC CO LTD
发明人： MUKASA KAZUNORI
IPC分类号： G02B6/036 , G02F1/35 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide a dispersion compensating optical fiber which is suitable for the Raman amplification for adaptation to high-speed transmission and for compensating dispersion of a non-zero dispersion shifted fiber. SOLUTION: The dispersion compensating optical fiber includes a depressed layer having a ≤-0.7% relative refractive index difference based upon at least one clad of one or more core layers covering the outer circumferential side of a center core. In the dispersion compensating optical fiber, a ratio of a dispersion value to dispersion slope is 30 to 80 nm, at a 1,550 nm wavelength, or a dispersion value is ≤-20 ps/nm/km, a dispersion slope is ≤-0.05 ps/nm 2 / km, and A eff is 8 to 13 μm 2 . COPYRIGHT: (C)2003,JPO

40. 发明专利

JP2003240987A OPTICAL WAVEGUIDE MODULE 审中-公开
公开(公告)号：JP2003240987A
公开(公告)日：2003-08-27
申请号：JP2002038606
申请日：2002-02-15
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SAWAMURA TAKESHI , WATANABE TOMOHIRO , OTA TOSHIHIKO , SAITO TSUNEAKI
IPC分类号： G02B6/12 , G02F1/01
摘要： PROBLEM TO BE SOLVED: To provide an optical waveguide module in which the temperature of an optical waveguide chip is stably adjusted with small power consumption. SOLUTION: The optical waveguide module is provided with the optical waveguide chip 9 having an optical waveguide circuit for which light transmission characteristics are changed at least by the temperature, such as an array waveguide diffraction grating, a temperature detecting element 30 which detects the temperature of the optical waveguide chip 9, and a temperature adjusting module 8 which adjusts the temperature of the optical waveguide chip 9 on the basis of the detection temperature of the temperature detecting element 30. The temperature adjusting module 8 and the optical waveguide chip 9 are piled up and directly joined. The temperature detecting element 30 is provided on a position to detect the temperature at the position away from the optical waveguide circuit center position C1 of the optical waveguide chip 9, and by the light transmission center wavelength deviation of the optical waveguide chip 9 based on a difference between the detection temperature and the temperature at the center position C1, the light transmission center wavelength deviation of the optical waveguide chip based on the warp of the temperature adjusting module 8 is reduced. COPYRIGHT: (C)2003,JPO

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