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1. 发明专利

JPH1123855A WIRING METHOD FOR OPTICAL FIBER 失效
公开(公告)号：JPH1123855A
公开(公告)日：1999-01-29
申请号：JP17734297
申请日：1997-07-02
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE , SEIWA GIKEN KK
发明人： NANRI NOBUHIRO , WATANABE KAZUKI , OTA TOSHIHIKO , IBUSUKI YASUHIRO , YOSHIOKA KENJI , TOMITA KENICHI , NAKAO NAOKI , IWADATE KAZUO
IPC分类号： G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide the wiring method for an optical fiber which saves the space when many optical fibers extending out of an optical module are wired round. SOLUTION: Many optical modules are arrayed on racks 11 in stages so that they can freely be inserted and extracted, and the optical module has the 1st connection side CS1 of an optical fiber formed on one side in the insertion/extraction direction and the 2nd connection side CS2 on the other; and the optical fiber is extended out of at least the 1st connection side CS1. A single-core fiber 4 and a multicore fiber 3 are connected individually to the 1st connection side CS1 of each optical module and many single-core fibers 4 and multicore fibers 3 extended out of the 1st connection sides CS1 of many optical modules 1 are stored in mutually different storage means 12 and 13.

2. 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.

3. 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.

4. 发明专利

JPS60205407A TERMINAL PART OF COATED OPTICAL FIBER 失效
公开(公告)号：JPS60205407A
公开(公告)日：1985-10-17
申请号：JP6154884
申请日：1984-03-29
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOMURA KENICHI , TATEGAMI SHIGERU , OOTAKE AKIHIRO , OBARA YUUICHI , WATANABE KAZUKI , ISO TAKAAKI , MIYAJIMA YOSHIAKI
IPC分类号： G02B6/24 , C03C25/10 , G02B6/00 , G02B6/02 , G02B6/245 , G02B6/255 , G02B6/44 , H02G1/12
摘要： PURPOSE:To remove effectively the factor to deteriorate the strength in the welded juncture of coated optical fibers by removing the coatings from the ends of the fibers to expose bare optical fibers and forming a hard film on the outside circumference of the bare optical fibers. CONSTITUTION:A coating 2 is removed by a removing tool for coating from the end of a coated optical fiber 1 to expose a bare optical fiber 3. The part of the exposed fiber 3 is wiped with absorbent cotton moistened with an org. solvent such as aceton to wipe away the remaining coating material. The exposed part of the fiber 3 is thereafter dipped in a soln. of insulating urethane varnish dissolved in a solvent such as glycol ether and is then pulled up and dried to form a hard film 4 of the varnish on the outside circumference of the fiber. The top end side thereof is cut approximately perpendicularly to make adequate butt end faces 5, 5. Both fibers 3, 3 are welded and connected by arc discharge.

5. 发明专利

JPH11119055A WAVEGUIDE MODULE 失效
公开(公告)号：JPH11119055A
公开(公告)日：1999-04-30
申请号：JP27908297
申请日：1997-10-13
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OTA TOSHIHIKO , IWASHITA TAKAHIKO , WATANABE KAZUKI , ENOMOTO YOSHITAKA
IPC分类号： G02B6/30
摘要： PROBLEM TO BE SOLVED: To make a freely attachable and detachable butting connection of an optical connector with one end of a waveguide chip by surrounding at least the connection side of the other end of a waveguide chip for an optical fiber with a protection cover. SOLUTION: The waveguide module has a waveguide chip 2, intermediate members 3 and 4, an optical fiber array 5, and the protection cover 6 and a multicore connector 20 is connected freely attachably and detachably by butting to one end of the waveguide chip 2 along the length as its optical transmission direction. The protection cover 6 made of synthetic resin, metal, etc., is formed in a long cylinder shape of an upper cover 7 and a lower cover 8 which are positioned and combined with a projection and a recessed part. Then the waveguide chip 2, intermediate members 3 and 4, and the optical fiber array 5 are surrounded with the protection cover 6. Consequently, the waveguide module does not have its optical characteristics affected by the attachment and detachment of the multicore connector 20 on the waveguide chip 2 even when the multicore connector 20 is attached and detached through the opening 7a of the upper cover 7.

6. 发明专利

JPH1123897A OPTICAL BRANCHING UNIT 失效
公开(公告)号：JPH1123897A
公开(公告)日：1999-01-29
申请号：JP17733697
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： G02B6/36 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide the optical branching unit which makes it easy to attach and detach the lid of a subunit containing excessive length of an optical fiber and contributes to the improvement of the operability of connecting the optical fiber. SOLUTION: Of the optical branching unit equipped with a 1st unit 2 which stores the optical fiber 4 over excessive-length treatment and a 2nd unit 5 which is arranged slidably and contiguously to the 1st unit 2 and stores the optical fiber 4 drawn out of the 1st unit 2 over excessive-length treatment, the 2nd unit 5 is equipped with a lid 8 which has a hinge 8a and is freely opened and closed and a knob part 9 for drawing-out operation which has a notch 9a.

7. 发明专利

JPH09166724A MANUFACTURE OF OPTICAL WAVEGUIDE MODULE 失效
公开(公告)号：JPH09166724A
公开(公告)日：1997-06-24
申请号：JP34773395
申请日：1995-12-15
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： WATANABE TOMOHIRO , IWASHITA MASAHIKO , WATANABE KAZUKI , SHIMIZU TAKEO , NAGASAWA SHINJI , KIHARA MITSURU
IPC分类号： G02B6/30 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To exactly form positioning grooves for positioning with connecting end members at a waveguide chip. SOLUTION: The waveguide chip 13 is first formed by forming core parts 2 embedded into the clad layer 3 on the front surface 9 side of a substrate 1. Next, the fixed width grooves 10 are formed by using an etching liquid which does not react with the substrate 1 in the guide groove forming parts of the clad layers 3b on both sides across the region where the core parts 2 are formed. The substrate front surface 9 side exposed in these fixed width grooves 10 are anisotropically etched by using the etching liquid which does not react with the clad layers 3b with the clad layers 3b as a mask and, thereafter, the positioning grooves 16 having a V shape are formed. The positioning parts formed on the connecting end member side are positioned into these grooves 16, by which the waveguide chip 13 and the connecting end member are fitted and fixed.

8. 发明专利

JP2000221364A MULTI-FIBER OPTICAL CONNECTOR 失效
公开(公告)号：JP2000221364A
公开(公告)日：2000-08-11
申请号：JP2636799
申请日：1999-02-03
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： WATANABE TOMOHIRO , IWASHITA TAKAHIKO , OTA TOSHIHIKO , WATANABE KAZUKI , ENOMOTO YOSHITAKA , IZUMIDA CHIKASHI
IPC分类号： G02B6/36 , G02B6/26
摘要： PROBLEM TO BE SOLVED: To provide a small-sized multi-fiber optical connector which can easily be connected to an opposite-side optical component with small splice loss. SOLUTION: First and 2nd bare optical fibers 4a and 4b led out of 1st and 2nd optical fiber ribbons 6a and 6b which are arrayed one over the other are heddled alternately to perform array conversion and then arrayed and fixed in optical fiber array guide grooves 22 arranged on a plane substrate 21 at intervals nearly equal to the external diameter of the bare optical fibers 4. A connection end member 24 having an engagement recessed part 12 surrounding the plane substrate 21 is provided on the side of a connection end surface 5 of the plane substrate 21 and the connection end member 24 and plane substrate 21 are both positioned and fixed by inverted V-shape grooves 23 of the connection end member 24 and positioning guide grooves 23 of the plane substrate 21. The connection end member 24 is provided with pin engagement holes 26 for connection with an optical component on the connection opposite party side on both the sides across the array areas of the 1st and 2nd bare optical fibers 4a and 4b and connected to the optical component through pins inserted into the pin engagement holes 26.

9. 发明专利

JPS63133107A CLAMPING METHOD FOR FUSION SPLICING OF MULTICORE-COATED OPTICAL FIBER 失效
公开(公告)号：JPS63133107A
公开(公告)日：1988-06-04
申请号：JP28130086
申请日：1986-11-26
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： WATANABE KAZUKI , OTAKE AKIHIRO , TATEGAMI SHIGERU , MATSUMOTO MICHITO
IPC分类号： G02B6/24 , G02B6/40
摘要： PURPOSE:To rationalize the process by attaching fixing tools to outside peripheral surface of end parts of multicore coated optical fibers and removing coating layers and cutting front end parts of respective optical fiber strands to an even length to eliminate the irregularity in length of front ends of optical fiber strands in the clamping state. CONSTITUTION:End parts of multicore coated optical fibers Fa and Fb are fitted into recessed grooves 19 of fixing tools 11, and base plates 12 and cover plates 13 are closed and held to attach fixing tools 11 to outside peripheral surfaces of end parts of multicore coated optical fibers Fa and Fb. Coating layers and optical fiber strands 1a-1e and 2a-2e in these layers are mutually bound, and coating layers are removed and front end parts of optical fiber strands 1a-1e and 2a-2e are cut to an even length. Consequently, front ends of optical fiber strands are cut to an even length in an about even state. Thereafter, end parts of multicore coated optical fibers Fa and Fb are placed on a mobile base together with fixing tools, and fixing tools 11 are detachably fixed to the mobile base, and thereby, front ends of optical fiber strands 1a-1e and 2a-2e are not irregular in length in the set state on the mobile base.

10. 发明专利

JPS60205404A METHOD FOR CONNECTING COATED OPTICAL FIBERS AND METHOD FOR REINFORCING JUNCTURE OF COATED OPTICAL FIBERS 失效
公开(公告)号：JPS60205404A
公开(公告)日：1985-10-17
申请号：JP6154984
申请日：1984-03-29
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： WATANABE KAZUKI , TATEGAMI SHIGERU , OOTAKE AKIHIRO , OBARA YUUICHI , KOMURA KENICHI , ISO TAKAAKI , MIYAJIMA YOSHIAKI
IPC分类号： G02B6/24 , G02B6/255
摘要： PURPOSE:To eliminate the factor to deteriorate the strength in the juncture of a pair of optical fibers and to improve the mechanical strength thereof by forming a film on the outside circumference of the fibers of which the end faces are held butted to each other and subjecting the juncture thereof to a surface treatment for the required time by a corrosive soln. which dissolves the fibers after welding. CONSTITUTION:Coatings 2A, 2B are removed from the ends of a pair of coated optical fibers 1A, 1B to expose bare optical fibers 3A, 3B. The exposed parts are dipped in a soln. of insulating urethane varnish dissolved in a solvent such as glycol ether or the like and is then pulled up and dried to form the hard film of the varnish on the outside circumference. The top end sides are cut perpendicularly to make adequate butt end faces 5A, 5B. The end faces are butted to each other and are welded and connected by arc discharge via a pair of discharge electrodes 6M, 6N. The juncture 7 is dipped in a corrosive soln. 8, is taken out thereof, is cleaned and is further dried; thereafter the outside circumference of the bare optical fibers 3A, 3B including the juncture 7 is immediately coated by urethane resin varnish.

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