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81. 发明专利

JPH11125754A IDENTIFICATION DISPLAY OF EXTREMELY FINE OPTICAL FIBER CORD 失效
公开(公告)号：JPH11125754A
公开(公告)日：1999-05-11
申请号：JP30502997
申请日：1997-10-21
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIMOMICHI TAKESHI , INO ETSUO , OHASHI KEIJI , ENOMOTO YOSHITAKA
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To enable easy and sure identification many fiber-cords by segmenting tensile fiber groups encircling a coated optical fiber to plural blocks by coloration in a circumferential direction and making a UV resin sheath transparent. SOLUTION: An optical fiber cord 4 is constituted by placing the tensile fiber groups (colored glass fibers) 2 longitudinally along the coated optical fiber 1 formed by coating the optical fibers with a UV resin and subjecting this coated optical fiber to coating (sheath) 3 with the transparent UV resin. In such a case, the tensile fiber groups 2 are segmented to four blocks (2a, 2b, 2c, 2d). The respective identification symbols of the respective optical fiber cords 4 are formed by combinations of four colors among eight colors of red, yellow, yellowish green, green, blue, bluish purple, purple and red purple. Combinations of 70 sets of colors is possible by combining the four colors among the eight colors. The combinations of the further more colors is made possible by segmenting the tensile fiber groups 2 to three blocks or segmenting the same to two blocks and forming the respective blocks to different colors.

82. 发明专利

JPH11125753A ANNULAR IDENTIFICATION CODE OF OPTICAL FIBER OR THE LIKE AND FORMATION OF THIS IDENTIFICATION CODE 失效
公开(公告)号：JPH11125753A
公开(公告)日：1999-05-11
申请号：JP30503097
申请日：1997-10-21
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OMORI TATSUYA , SAITO SHIN , MIYAMOTO SUEHIRO , ENOMOTO YOSHITAKA
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To decrease the errors in branching work of optical fibers by erroneous identification and to drastically expand an identifiable range by facilitating the visual identification between the many optical fibers. SOLUTION: The optical fiber F is printed with plural coloring rings varying in colors from the sheath color of the fiber and is provided with coloring ring groups G consisting of the plural coloring rings at specified intervals B in the longitudinal direction of the optical fiber F. The coloring ring groups G are the assemblies arranged with two pieces of the same coloring rings symmetrically with the center thereof. The annular identification codes for the optical fibers, etc., are obtd. by forming the combinations of the colors of the respective coloring rings of the coloring ring groups G as identification codes.

83. 发明专利

JPH11119068A METHOD FOR ADDING FIBER IDENTIFICATION SYMBOL TO COATED OPTICAL FIBER AND THE COATED OPTICAL FIBER 失效
公开(公告)号：JPH11119068A
公开(公告)日：1999-04-30
申请号：JP29320697
申请日：1997-10-13
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIMOMICHI TAKESHI , INO ETSUO , OHASHI KEIJI , ENOMOTO YOSHITAKA
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To obtain a method for mounting bar codes which is a method of adding identification symbols for managing coated fiber connection in a central office, is capable of distinctly, simply and easily adding the bar code as the identification symbols to an extremely fine coated optical fiber and improving the durability of bar code display and obviates degrading of the brightness of the bar code display even if the reading by a contact bar code reader is repeated. SOLUTION: This method for adding fiber identification symbols of the coated optical fiber consists of putting a sheet S printed with the bar codes on the coated optical fiber (f) longitudinally along the fiber, affixing its rear surface to the coated optical fiber (f), cutting away the extra length part D thereof, winding the sheet once around the fiber, forming a longitudinal notch Y to a transparent plastic tube (t) having a bore smaller than the bore of the coated optical fiber (f) to form a tube of a sectional type and forcibly fitting the tube to the fiber overlapping on the surface printed with the bar codes, thereby fixing the tube and the fiber.

84. 发明专利

JPH11118664A METHOD AND APPARATUS FOR READING IDENTIFICATION SYMBOL OF OPTICAL COATED FIBER 失效
公开(公告)号：JPH11118664A
公开(公告)日：1999-04-30
申请号：JP29320497
申请日：1997-10-13
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIMOMICHI TAKESHI , INO ETSUO , OHASHI KEIJI , ENOMOTO YOSHITAKA
IPC分类号： G01M11/00 , G02B6/44
摘要： PROBLEM TO BE SOLVED: To scan a bar code indicated on an optical coated fiber accurately by an arrangement wherein the optical coated fiber is fitted in the groove of a supporting member and the bar code is read out by sliding the optical coated fiber along the groove of the supporting member. SOLUTION: A supporting member 1 is made of transparent plastic and a pen type bar code reader 2 is fixed to the upper surface of the supporting member 1 in the center thereof. A through hole is made along the reading laser axis of a reader and a linear groove 3 is made in the rear. The coated fiber (f) of an optical fiber is fitted in the linear groove 3 and held linearly under that arrangement. When the coated fiber (f) of optical fiber is slid along the linear groove 3 and drawn out, a bar code indicated on the optical coated fiber is read out by means of pen type bar code reader 2.

85. 发明专利

JPH11109182A OPTICAL FIBER CABLE THREE-POINT SWITCHING CONNECTION SYSTEM 失效
公开(公告)号：JPH11109182A
公开(公告)日：1999-04-23
申请号：JP26548097
申请日：1997-09-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： IBAYASHI TOSHIYA , TOMITA NOBUO , ENOMOTO YOSHITAKA , TANAKA FUMIAKI
IPC分类号： G02B6/40 , H04B10/00 , H04B10/27 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber cable switching connection system capable of a three-point opposed switching connection including a branch switching section. SOLUTION: This system is provided with first, second and third optical fiber connector switching devices for switching a first connecting point, a second connecting point and a third connecting point, respectively, in the switching connection of an active optical fiber tape coated fiber to a switching optical fiber tape coated fiber in the first connecting point within a branch switching section, and the second connecting point and the third connecting point after branching, and a switching operation is performed while synchronizing the three optical fiber connector switching devices. This system is also provided with a main synchronous switching control device and two slave synchronous switching control devices 3 for the synchronization. The timing of the operation before and after switching of the first optical fiber connector switching device is shifted from the timing of the second and third optical fiber connector switching devices, whereby the optical level fluctuation of optical signals can be suppressed.

86. 发明专利

JPH10246838A OPTICAL FIBER ARRAY DEVICE 失效
公开(公告)号：JPH10246838A
公开(公告)日：1998-09-14
申请号：JP5004197
申请日：1997-03-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAGI AKIHIRO , HANAWA FUMIAKI , TAKATO NORIO , SUMITA MAKOTO , FUKUMITSU TAKAO , HIDA YASUHIRO , ENOMOTO YOSHITAKA
IPC分类号： G02B6/24 , G02B6/08 , G02B6/30 , G02B6/40
摘要： PROBLEM TO BE SOLVED: To enable the high-density connection to the input and output ports of a waveguide type optical chip with high accuracy at a low cost by fixing the bare optical fibers exposed by stripping the coatings of first and second ribbon type multiple optical fibers to a V-shaped part and fixing the coating parts to a fixing part. SOLUTION: An optical fiber-mounting member 1 comprises a V-groove region (V-shaped part) provided with V-grooves at one end and a flat region (fixing part) formed flat at the other end and more particularly a difference in level to about the extent of the thickness of the coatings of 4 pieces of 8-fiber coated optical fiber ribbons is disposed between the V-groove region and the flat region in order to avoid applying of unnecessary stresses on the respective bare optical fibers 3a to 3d aligned in the V-groove region. The arranging pitch of the V-grooves 4 for mounting the bare optical fiber is set slightly larger than the outside diameter of the respective bare optical fibers 3a to 3d. The bare optical fibers 3a, 3b exposed by stripping the coatings of the ribbon type multiple optical fibers 2a, 2b are fixed to the V-shaped part and the coating parts are fixed to the fixing part.

87. 发明专利

JPH10227720A OPTICAL PATH DIAGNOSTIC DEVICE 失效
公开(公告)号：JPH10227720A
公开(公告)日：1998-08-25
申请号：JP4474497
申请日：1997-02-13
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NAKAMURA YASUSHI , UNAMI YOSHIHARU , ENOMOTO YOSHITAKA
IPC分类号： G01M11/00
摘要： PROBLEM TO BE SOLVED: To provide a compact, light-weight and portable optical path diagnostic device with the remarkably low cost, by which the rough diagnosis of an optical path, can be very easily performed. SOLUTION: A transistor 25 for driving, is driven by a reference DC power source 23, to generate the DC light from a luminous element 31, the DC light is sent an optical coupler 34 and an adapter 12 so that an optical signal is entered into an optical fiber to be diagnosed 50, the outgoing light from the optical fiber to be diagnosed 50, is guided to a light intercepting element 32 through the adapter 12 and the optical coupler 34, and a light intercepting signal is amplified by a variable amplifier 35 for amplifying an audio signal, to be sent to the earphones 41 of a head set 40 through an input and output terminal 11.

88. 发明专利

JPH10163966A OPTICAL LINE TEST SYSTEM 失效
公开(公告)号：JPH10163966A
公开(公告)日：1998-06-19
申请号：JP31446196
申请日：1996-11-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ENOMOTO YOSHITAKA , TOMITA NOBUO
IPC分类号： G02B6/00 , G01M11/00 , H04B3/46 , H04B10/07 , H04B10/077 , H04B10/08
摘要： PROBLEM TO BE SOLVED: To miniaturize and economize an optical line test system. SOLUTION: This system is provided with transmitters 1 and 8 for performing optical communication with an optical fiber 5 as a medium, a photocoupler 4 for inputting test light to the optical fiber 5 and optical filters 2 and 7 for transmitting communication light and interrupting the test light right in front of the transmitters 1 and 8. The photocoupler 4 is provided with four input/ output ports (a), (b), (c) and (d), the optical fiber 5 for performing the optical communication is connected to the ports (a) and (c) among them and a 1×N optical fiber selection device 10 is connected to the port (b). A stabilized light source 9 for outputting the modulation light of a wavelength band longer than the communication light as the testing light is connected to the movable side of the optical fiber selection device 10, the optical filter 11 for reflecting only the testing light is connected to the port (d) and a non-reflection terminal 12 for absorbing both of the communication light and the testing light is connected at the end.

89. 发明专利

JPH0815620A FILTER TYPE OPTICAL SWITCH 失效
公开(公告)号：JPH0815620A
公开(公告)日：1996-01-19
申请号：JP15088794
申请日：1994-07-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOMITA NOBUO , NAKANISHI ISAO , ENOMOTO YOSHITAKA , OYAMADA YAHEI
IPC分类号： G02B6/00 , G02B26/08 , H04B10/07 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/02 , H04B10/28
摘要： PURPOSE:To provide a small-sized, inexpensive optical switch with low loss and high reliability. CONSTITUTION:This switch is provided with a substrate 6 provided with V grooves 7 of at least one or above for fixing optical fibers 4, 5 provided on a surface, a slit part 8 provided so as to traverse obliquely the V grooves 7, the optical fibers 4, 5 fixed to the V grooves 7, the optical fibers 4, 5 fixed to the V grooves 7 on both sides of the slit part 8, an optical filter 3 interrupting or transmitting an optical signal of a specific wavelength or a specific wavelength band provided on the slit part 8 loadably/unloadably, a moving means loading/unloading the optical fiber 3 so as to shield the cross section parts or at least the core parts of the optical fibers 4, 5 in the slit part; and is sealed in a vessel together with a refractive index adjusting agent 12. A bimorph type element 2 or an electromagnetic moving means may be used as the moving means loading/unloading the optical filter 3.

90. 发明专利

JPH06331494A OPTICAL LINE TESTING METHOD 失效
公开(公告)号：JPH06331494A
公开(公告)日：1994-12-02
申请号：JP12296493
申请日：1993-05-25
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ENOMOTO YOSHITAKA , TOMITA NOBUO , OYAMADA YAHEI
IPC分类号： G01M11/00 , G01M11/02
摘要： PURPOSE:To automatically set optimum measuring conditions and to achieve an extremely efficient test by acquiring a first response light waveform by a preliminary measurement with an optimum light reception level and then detecting Fresnel reflection section existing at the response light wave. CONSTITUTION:Each part of a light pulse tester 1 is initially set according to preliminary measurement parameters supplied from a control device via a GP-IB interface 13, preliminary measurement based on it is performed, and then the waveform data of the obtained response light is written into a memory 12. Then, a response waveform where a preliminary masking is made is received by a light reception part 17 and is taken into an average processing part 20. The preliminary measurement is automatically and repeatedly executed, thus searching a Fresnel reflection section generated between the near edge and far edge of an optical line and then setting the starting and ending points of this section as the mask position of the optical line and hence automatically setting the mask position on this measurement.

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