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1. 发明专利

DE69020414T2 未知
公开(公告)号：DE69020414T2
公开(公告)日：1995-11-16
申请号：DE69020414
申请日：1990-04-11
申请人： FUJIKURA LTD
发明人： TAYA HIROYUKI , YOSHINUMA MIKIO , YAMADA TAKESHI , NISHIDE KENJI , SUZUKI FUMIO , FUJIMOTO HIROSHISA , YAMAUCHI RYOZO
IPC分类号： G02B6/28 , C03B37/15
摘要： The present invention discloses a manufacturing method for polarization maintaining optical fiber couplers which are used for joining light signals and at optical fiber branch points. The disclosed manufacturing method employs polarization maintaining optical fibers, and describes a method for mutually aligning the stress applying parts of such optical fibers so that polarized optical signals are maintained in the polarized state when transiting such couplers. In the manufacturing method of the present invention, the above mentioned positioning step is characterized in that, an image is obtained of the light transmitted through the fiber from a light source (24) on one side of the optical fibers with an image sensor (28) (TV-camera) positioned on the opposite side, whereby by examining the light intensity distribution of the fiber images thereby obtained while rotating one or both of the component optical fibers (12), the component optical fibers (12) are brought into the desired alignment.

2. 发明专利

CA2051363A1 OPTICAL FIBER FUSION SPLICER 未知
公开(公告)号：CA2051363A1
公开(公告)日：1992-09-23
申请号：CA2051363
申请日：1991-09-13
申请人： FUJIKURA LTD
发明人： SATO KATSUO , OZAWA KOJI , SUZUKI ISAO , YOSHINUMA MIKIO
IPC分类号： G02B6/255 , H05B7/148

3. 发明专利

CA2130862C APPARATUS FOR ADJUSTING ALIGNMENT OF OPTICAL FIBERS 未知
公开(公告)号：CA2130862C
公开(公告)日：1997-10-21
申请号：CA2130862
申请日：1994-08-25
申请人： NIPPON TELEGRAPH & TELEPHONE , FUJIKURA LTD
发明人： AOSHIMA SHINICHI , YOSHINUMA MIKIO , SUZUKI ISAO , MOROOKA MICHIO , TAKAHASHI KENJI , SUZUKI YASUO
IPC分类号： G02B6/255 , G02B6/38 , G02B6/42 , G02B6/24
摘要： An apparatus for adjusting the alignment of the optical fibers at a high precision, formed by a base frame having a plurality of pairs of V-grooves for mounting the optical fibers at mutually facing sides of the base frame, each V-groove being defined by a fixed member and a movable member, each movable member being movable within a guide groove defined between each adjacent fixed members, and one of each pair of V-grooves on one of the mutually facing sides has the fixed member and the movable member facing against the movable member and the fixed member, respectively, of another one of each pair of V-grooves on another one of the mutually facing sides; and a plurality of piezoelectric elements, each of which is connected with each movable member of each V-groove, for causing each movable member to move within the guide groove such that a displacement of each movable member makes an adjustment of a position of an optical fiber mounted on each V-groove.

4. 发明专利

DE3784372T2 未知
公开(公告)号：DE3784372T2
公开(公告)日：1993-08-12
申请号：DE3784372
申请日：1987-05-20
申请人： FUJIKURA LTD , TOSHIBA KAWASAKI KK
发明人： ITOH KENICHIRO , YAMADA TAKESHI , ONODERA TSUTOMU , YOSHINUMA MIKIO , KATO NIPPON DENSHINDENWA
IPC分类号： G02B6/255 , G02B6/38 , C03B37/14
摘要： An apparatus for fusion-splicing a pair of polarization maintaining optical fibers comprises stopper means (39) to which the end faces of the fibers (10) abut, a microscope (90) for observing the alignment, rotating means (44A, 44B) and means for fusion-splicing said pair of aligned optical fibers. The stopper means (39) is provided with a mirror and the microscope (90) picks up an image of the end faces of said optical fibers via said mirror means. Further the apparatus comprises means (112, 116, 118) for setting said mirror at different positions.

5. 发明专利

DE69020414D1 未知
公开(公告)号：DE69020414D1
公开(公告)日：1995-08-03
申请号：DE69020414
申请日：1990-04-11
申请人： FUJIKURA LTD
发明人： TAYA HIROYUKI , YOSHINUMA MIKIO , YAMADA TAKESHI , NISHIDE KENJI , SUZUKI FUMIO , FUJIMOTO HIROSHISA , YAMAUCHI RYOZO
IPC分类号： G02B6/28 , C03B37/15
摘要： The present invention discloses a manufacturing method for polarization maintaining optical fiber couplers which are used for joining light signals and at optical fiber branch points. The disclosed manufacturing method employs polarization maintaining optical fibers, and describes a method for mutually aligning the stress applying parts of such optical fibers so that polarized optical signals are maintained in the polarized state when transiting such couplers. In the manufacturing method of the present invention, the above mentioned positioning step is characterized in that, an image is obtained of the light transmitted through the fiber from a light source (24) on one side of the optical fibers with an image sensor (28) (TV-camera) positioned on the opposite side, whereby by examining the light intensity distribution of the fiber images thereby obtained while rotating one or both of the component optical fibers (12), the component optical fibers (12) are brought into the desired alignment.

6. 发明专利

DE3888306T4 未知
公开(公告)号：DE3888306T4
公开(公告)日：1995-02-02
申请号：DE3888306
申请日：1988-12-02
申请人： FUJIKURA LTD
发明人： ITOH KENICHIROH , YOSHINUMA MIKIO , NAOMICHI SUZUKI , TAYA HIROYUKI
IPC分类号： G02B6/255 , C03B37/14
摘要： theta -clamp (58) also serves as a jacket clamp. The clamp comprises a cover (60) mounted on an arm (56) by a hinge (62) and kept closed by a magnet (64), so that a pusher (66) provided in the cover (60) is urged against a jacketed portion (12) of an optical fiber (10) by a spring (68). In this state, the fiber (10) is rotated in a theta direction by rotating a dial (36). theta -clamp (40) also serves as a jacket clamp. Therefore, 1. The theta -clamp (40) can be positioned close to a fiber clamp (22). For this reason, the optical fiber is not twisted during theta -axes alignment, and a follow-up property of rotation of the optical fiber with respect to rotation of the theta axis is improved. In addition, the apparatus need not be adjusted so as not to twist the optical fiber. 2. The distance between fiber clamp (22) and theta -clamp (40) is shortened. Therefore, when the optical fiber is clamped and moved in the z direction, the jacketed portion (12) is not flexed. For this reason, a follow-up property of movement of the end face of the optical fiber with respect to movement of a table (24) in the z-axis direction is improved. n

7. 发明专利

DE69408752T2 未知
公开(公告)号：DE69408752T2
公开(公告)日：1998-07-02
申请号：DE69408752
申请日：1994-08-25
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI ISAO , SUZUKI YASUO , TAKAHASHI KENJI , MOROOKA MICHIO , YOSHINUMA MIKIO , AOSHIMA SHINICHI
IPC分类号： G02B6/255 , G02B6/38 , G02B6/42

8. 发明专利

DE69120930T2 未知
公开(公告)号：DE69120930T2
公开(公告)日：1996-12-19
申请号：DE69120930
申请日：1991-09-16
申请人： FUJIKURA LTD
发明人： SATO KATSUO , OZAWA KOJI , SUZUKI ISAO , YOSHINUMA MIKIO
IPC分类号： G02B6/255 , H05B7/148

9. 发明专利

DE69021715T2 未知
公开(公告)号：DE69021715T2
公开(公告)日：1996-05-02
申请号：DE69021715
申请日：1990-12-28
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SETAISHI YUKIO , YOSHINUMA MIKIO , OOBA MASAO
IPC分类号： G02B6/44
摘要： In a method of preventing twisting of a fusion-spliced optical fiber in the process of encasing the optical fiber in a casing, one (162) of a pair of optical fibers (161, 162) is wound N turns in one direction to form a first coil. Another (161) of the pair of optical fibers is wound N turns in another direction opposite to the direction to form a second coil. Ends of remainder portions of the optical fibers which are not wound are fusion-spliced to each other to form a fusion-spliced portion (48). The fusion-spliced portion is fixed within a casing (14). The remainder portions of the optical fibers are pushed into the casing to expand the first and second coils.

10. 发明专利

DE69021715D1 未知
公开(公告)号：DE69021715D1
公开(公告)日：1995-09-21
申请号：DE69021715
申请日：1990-12-28
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SETAISHI YUKIO , YOSHINUMA MIKIO , OOBA MASAO
IPC分类号： G02B6/44
摘要： In a method of preventing twisting of a fusion-spliced optical fiber in the process of encasing the optical fiber in a casing, one (162) of a pair of optical fibers (161, 162) is wound N turns in one direction to form a first coil. Another (161) of the pair of optical fibers is wound N turns in another direction opposite to the direction to form a second coil. Ends of remainder portions of the optical fibers which are not wound are fusion-spliced to each other to form a fusion-spliced portion (48). The fusion-spliced portion is fixed within a casing (14). The remainder portions of the optical fibers are pushed into the casing to expand the first and second coils.

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