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21. 发明专利

JPH09197142A LIGHT BRANCHING UNIT 失效
公开(公告)号：JPH09197142A
公开(公告)日：1997-07-31
申请号：JP673296
申请日：1996-01-18
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OTA IKUO , NARAOKA SEIICHI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G02B6/44 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive light branching unit capable of being simply replaced without exerting influence upon optical communication. SOLUTION: This light branching unit 10 is used for an optical line access device for leading test light into an optical line and many units 10 are arrayed on a wiring frame at a prescribed pitch so as to be optionally attached/detached to connect a terminated out-of-station cable to an intra-station cable. Each unit 10 is provided with a coupler 11 for connecting at least one of an optical fiber 13 for the out-of-station cable and a test fiber 14 for leading test light into the unit 10 to one end of an intra-station side fiber 15 and an adaptor 12 fixed to the other end of the fiber 15 and connected to the intra-station cable so as to be optionally attached/detached.

22. 发明专利

JPH09133885A OPTICAL SWITCH 失效
公开(公告)号：JPH09133885A
公开(公告)日：1997-05-20
申请号：JP31597695
申请日：1995-11-09
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OOMIZU KIYONORI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G02B26/08 , H04B10/25 , H04B10/27 , H04B10/29 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To provide the optical switch which can easily be manufactured in a short time at low cost. SOLUTION: On an optical fiber mount base 9, plural reception-side optical fibers 3 which are led out of a ribbon 6 of optical fibers are mounted in parallel, the base end sides of the optical fibers 3 are fixed with an adhesive, and the connection end surfaces 15 of the reception-side optical fibers 3 are projected from the tip 12 of the optical fiber mount base 9. A V-groove formed substrate 13 which has plural V grooves 5 formed and has a master optical fiber 4 fixed in a V groove 5a is arranged opposite the reception-side optical fibers 3, a master moving mechanism 25 moves the master optical fiber 4 in the X and Y directions in the figure integrally with the V-groove formed substrate 13 to insert the connection end surfaces 15 of the reception-side optical fibers 3 into the V grooves 5a selectively, and then the connection end surfaces 16 and 15 of the master optical fiber 4 and reception-side optical fibers 3 are put opposite each other in the V grooves 5, thereby connecting the master optical fiber 4 and recepiton-side optical fibers 3 together so that they can freely be switched.

23. 发明专利

JPH09133884A OPTICAL SWITCH 失效
公开(公告)号：JPH09133884A
公开(公告)日：1997-05-20
申请号：JP31597595
申请日：1995-11-09
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SUEKI HIROYOSHI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G02B6/24 , G02B6/00 , G02B26/08
摘要： PROBLEM TO BE SOLVED: To improve the long-time reliability by preventing an array member for reception-side optical fibers from being strained and also prevent a reception- side optical fiber from peeling off an array member. SOLUTION: The optical fiber array member 1 has plural V grooves 5 cut in parallel and the connection end surfaces 15 of the reception-side optical fibers 3 are sunk and arrayed along the length of the respective V grooves 5; and a reception-side optical fiber press member 6 which is made of the same material with the optical fiber array member 1 is provided above the reception- side optical fibers 3 across an adhesive 10 and stress due to the difference in the coefficient of linear expansion between the adhesive 10 and optical fiber array member 1 is received, and reduced and suppressed by the reception-side optical fiber press member 6, thereby preventing the optical fiber array member 1 from being strained and the reception-side optical fibers from peeling off the optical fiber array member 1. The connection end surface of a master optical fiber 4 fixed to a moving stage 14 is moved to the connection end surface 15 of the reception-side optical fiber 3 and selectively inserted into the V groove 5, thereby making an optical connection between the master optical fiber 4 and reception-side optical fiber 3 so that they can freely be switched.

24. 发明专利

JPH09133833A STRUCTURE FOR FIXING OPTICAL FIBER RIBBON TO OPTICAL FIBER ARRAY MEMBER 失效
公开(公告)号：JPH09133833A
公开(公告)日：1997-05-20
申请号：JP31597095
申请日：1995-11-09
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ITO YOSHIHISA , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G02B6/24 , G02B6/00 , G02B6/40
摘要： PROBLEM TO BE SOLVED: To suppress an increase in the propagation loss of optical fibers by fixing the optical fiber ribbon, having optical fibers arranged successively at a fiber pitch different from the pitch of V grooves formed on an optical fiber array member, to the optical fiber array member in safety. SOLUTION: The connection end surface side of the optical fiber ribbon 6 having the optical fibers 5 arranged successively at the fiber pitch FP different from the set V groove pitch P of the V grooves 15 is mounted on the optical fiber ribbon mount base 11 of the optical fiber array member 1 having the V grooves 15 arranged at the set V groove pitch VP. Then when connection end surface sides of the optical fibers 5 exposed by removing the jacket on the tip side are arrayed and fixed in the respective V grooves 15, the root parts 9 of the exposed optical fibers 5 are arranged on the side of the mount base 11 at an interval L with the V groove arrangement area 14 of the optical fiber array member 1 and the interval L is used as a clearance space area 3 wherein the exposed optical fibers 5 are allowed to freely curve.

25. 发明专利

JPH1123854A STORAGE BOX 失效
公开(公告)号：JPH1123854A
公开(公告)日：1999-01-29
申请号：JP17733497
申请日：1997-07-02
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： IBUSUKI YASUHIRO , OTA TOSHIHIKO , OOMIZU KIYONORI , WATANABE KAZUKI , YOSHIOKA KENJI , TOMITA KENICHI , NAKAO NAOKI
IPC分类号： G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide the storage box which can use not only a multicore connector, but also a single-core connector, has the high degree of freedom of use, and enables an optical fiber to be drawn out at ease. SOLUTION: This storage box is equipped with a connection part 3 for a 1st optical connector, a storage part 7a for a 2nd optical connector 12, and an excessive-length processing part 5 for the excessive-length processing of the optical fiber fitted with the 1st and 2nd optical connectors 3b and 12, and the boxes are arrayed on a wring rack a wiring rack in quantities at specific intervals so that they can freely be inserted and extracted. The connection part 3 is a connection part for connecting single-core connectors 3b together and the storage part 7a is a storage part for storing >=1 multicore connectors 12 so that they can be drawn out.

26. 发明专利

JPH09222527A OPTICAL BRANCH UNIT, AND EXTRA-LENGTH STORAGE BOX AND LINER USED FOR SAME 失效
公开(公告)号：JPH09222527A
公开(公告)日：1997-08-26
申请号：JP2946596
申请日：1996-02-16
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OTA IKUO , FURUKAWA KOICHI , WATANABE KAZUKI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI , MIMA TAKASHI
IPC分类号： G02B6/24
摘要： PROBLEM TO BE SOLVED: To suppress the entanglement of many optical fibers, facilitate switching operation, and exert adverse influence on communication light in an in-service state by providing a coupler storage box and a 1st and a 2nd mount part where an extra- length storage box is mounted so that it can freely be extracted. SOLUTION: The optical branch unit 10 is equipped with the coupler storage box part 10a, and 1st and 2nd mount parts 10b and 10c and guide rails 10d... are formed at an upper part. Respective optical fibers 14 have specific length secured between the coupler storage part 10a and 1st and 2nd mount parts 10b and 10c in consideration of the outward leading of the extra-length storage boxes 17 and 18. This 1st mount part 10b is a part where the extra-length storage box 17 which stores the extra length of a test fiber 15 is mounted in a free extraction state, and formed on a right-side upper half part as the lead-out side of the optical branch unit 10. Further, the 2nd mount part 10c is a part where the extra storage box 18 which contains the extra length of a terminated fiber 16 is mounted in a free extraction state and formed at a right-side lower half part as the leading-out side of the optical branch unit 10.

27. 发明专利

JPH09145538A SYSTEM FOR MAINTAINING LIGHT RAY PATH 失效
公开(公告)号：JPH09145538A
公开(公告)日：1997-06-06
申请号：JP32365695
申请日：1995-11-17
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NARAOKA SEIICHI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G01M11/00 , G02B6/00 , H04B10/07 , H04B10/071 , H04B10/2507 , H04M3/26 , H04B10/08
摘要： PROBLEM TO BE SOLVED: To miniaturize an apparatus of a light ray path maintenance system and enhance reliability in various measurements of the ray path. SOLUTION: A light source 3 and measuring devices such as an OTDR(optical time domain reflectometer) 4, a light power meter 2, etc., are set at the side of a test control part 1. A first fiber-switching/selecting device E, and the test control part 1 are connected by a first master optical fiber 12. A second fiber- switching/selecting device E2 and the test control part are connected by a second master optical fiber 14. An optical fiber coupler 17 is optically connected to each ray path of a fiber optic cable. A detecting optical fiber 10 communicating with an input optical fiber of the optical fiber coupler 17 is arranged at the first fiber-switching/selecting device E1 , while the detecting fiber 10 communicating with an output optical fiber of the optical fiber coupler 17 is arranged at the second fiber-switching/selecting device E2 . The master optical fibers are connected/switched at the first and second fiber-switching/selecting devices E1 , E2 by a V-groove optical switch.

28. 发明专利

JPH09133883A CONNECTION PART STRUCTURE OF OPTICAL FIBER 失效
公开(公告)号：JPH09133883A
公开(公告)日：1997-05-20
申请号：JP31597295
申请日：1995-11-09
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OOMIZU KIYONORI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G02B6/24 , G02B6/00 , G02B6/40 , G02B26/08
摘要： PROBLEM TO BE SOLVED: To securely make an optical low-loss connection between optical fibers without flawing an optical fiber. SOLUTION: An optical fiber array member 1 is constituted by forming plural V grooves 5 in parallel at right angles to this paper surface, the connection parts 15 of reception-side optical fibers 3 are arranged and fixed in the respective V grooves 5 along the length of the grooves, and the connection part 16 of a master optical fiber 3 is inserted selectively into one of the V grooves on the sides of the connection tips 14 of the optical fibers 3. A master fixing member 6 which presses the master optical fiber 4 against the V groove 5 is provided so that it can freely be moved by a fixing member moving shaft 9, the connection tip 8 of the master optical fiber 4 is brought into contact with an optical fiber press surface 21 to contact with L along the length of the master optical fiber 4 to press the master optical fiber against the V groove 5 and restrain it, and thus the master optical fiber 4 is prevented from being damaged or floating, so that the master optical fiber is securely inserted and fixed in the V groove 5.

29. 发明专利

JPH09133882A OPTICAL SWITCH 失效
公开(公告)号：JPH09133882A
公开(公告)日：1997-05-20
申请号：JP31597195
申请日：1995-11-09
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： HATTORI NOBUHIKO , ITO YOSHIHISA , NARAOKA SEIICHI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G02B6/40 , G02B26/08
摘要： PROBLEM TO BE SOLVED: To securely make optical connections with reception-side optical fibers without breaking master optical fibers during movement. SOLUTION: An optical fiber array member 1 has plural V grooves 5 formed and the connection end surfaces 15 of the reception-side optical fibers 3 are put, arrayed, and fixed in the V grooves 5 along the length of the grooves; and the master optical fibers 4 are fixed to a moving stage 14, which is moved to above the V grooves 5. Above the V grooves 5, a swing arm 6 is provided at an initial set position having an interval with the V grooves 5 and moved as shown by A' to fall the master optical fibers 4 by the moving stage 14 in the V grooves and press them; and the connection end surfaces 15 of the master optical fibers 4 and the connection end surfaces 15 of the reception-side optical fibers 3 are put opposite each other and optically connected. A position detection sensor 13 judges whether or not the swing arm 6 is at the said initial set position and when not, a master movement stop member 20 prevents the master optical fibers 4 from moving.

30. 发明专利

JPH09133607A MONITORING CHANGEOVER APPARATUS FOR BEAM-OF-LIGHT LINE 失效
公开(公告)号：JPH09133607A
公开(公告)日：1997-05-20
申请号：JP31596795
申请日：1995-11-09
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NARAOKA SEIICHI , KUROIWA MASATO , NAKAO NAOKI , EBIHARA TAKASHI
IPC分类号： G01M11/00
摘要： PROBLEM TO BE SOLVED: To prevent a UV resin-coated wire from being degraded due to ultrasonic rays in the monitoring changeover apparatus of a beam-of-light line which uses the UV resin-coated wire. SOLUTION: Fiber changeover selection devices A1 to AN and optical-fiber coupler modules 18 are installed at a frame 11, beam-of-light lines 43 at respective cores of subscriber-based optical cables 33 are coupled to the optical-fiber coupler modules 18, and the respective optical-fiber coupler modules 18 are connected to receiver-side optical fibers at the fiber changeover selection devices A1 to AN. Optical switches are installed at the fiber changeover selection devices A1 to AN, the receiver-side optical fibers which communicate with beam-of-light lines to be measured are changed over selectively, and beams of detection light from the beam-of-light lines are sent to the side of a test and control part so as to be measured by a pulse tester, an OTDR or the like. The respective beam-of-light lines 43 at the optical cables 33, optical core wires at the optical- fiber coupler modules 18 and core wires at the receiver-side optical fibers on the side of the optical switches use UV resin-coated core wires, and an apparatus is covered with a UV-cutoff case 50 as a whole so as to prevent the UV resin-coated wires from being degraded due to ultraviolet rays.

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