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1. 发明专利

DE68922392T2 未知
公开(公告)号：DE68922392T2
公开(公告)日：1995-08-31
申请号：DE68922392
申请日：1989-08-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGASE RYO , NODA JUICHI , SUGITA ETSUJI
IPC分类号： G02B6/30 , G02B6/32 , G02B6/38 , G02B6/42
摘要： A ferrule for optical fibers transmitting linearly polarized light capable of preventing deterioration and fluctuation of the extinction ratio. The ferrule (100) incorporates at least two paths (107) connecting a region in a vicinity of an end of a puncture (102) for an optical fiber inside the flange portion with outside of the ferrule. These paths effectively enable the removal of air in such a region which could have caused an extraneous stress on the optical fiber resulting in deterioration of the extinction ratio. An optical fiber connector using this ferrule is also disclosed.

2. 发明专利

DE68922392D1 未知
公开(公告)号：DE68922392D1
公开(公告)日：1995-06-01
申请号：DE68922392
申请日：1989-08-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGASE RYO , NODA JUICHI , SUGITA ETSUJI
IPC分类号： G02B6/30 , G02B6/32 , G02B6/38 , G02B6/42
摘要： A ferrule for optical fibers transmitting linearly polarized light capable of preventing deterioration and fluctuation of the extinction ratio. The ferrule (100) incorporates at least two paths (107) connecting a region in a vicinity of an end of a puncture (102) for an optical fiber inside the flange portion with outside of the ferrule. These paths effectively enable the removal of air in such a region which could have caused an extraneous stress on the optical fiber resulting in deterioration of the extinction ratio. An optical fiber connector using this ferrule is also disclosed.

3. 发明专利

CA2025765A1 WIDE-BAND OPTICAL FIBER COUPLER AND ITS MANUFACTURING METHOD 未知
公开(公告)号：CA2025765A1
公开(公告)日：1991-03-21
申请号：CA2025765
申请日：1990-09-19
申请人： JAPAN AVIATION ELECTRON , NIPPON TELEGRAPH & TELEPHONE
发明人： SASAKI HIROYUKI , SHIMAMURA MASATO , TAKEUCHI YOSHIAKI , HANAFUSA HIROAKI , NODA JUICHI
IPC分类号： G02B6/28 , G02B6/255 , C03B37/15 , G02B6/26
摘要： Two optical fibers are stretched to form prestretched portions of different diameters, and then the optical fibers are fused together at their prestretched portions to form a coupling region, which is stretched to obtain a wide-band optical fiber coupler of a desired splitting ratio.

4. 发明专利

DE69109513T2 未知
公开(公告)号：DE69109513T2
公开(公告)日：1996-01-18
申请号：DE69109513
申请日：1991-02-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OGUCHI TAISUKE , HANAFUSA HIROAKI , NODA JUICHI , YAMADA NORIYOSHI , NISHI SHIRO , TOMITA NOBUO
IPC分类号： G02B5/28 , G02B6/34 , G02B6/26

5. 发明专利

GB2204145A FUSED FIBER COUPLER HAVING TWO OPTICAL FIBRE GROUPS IN PARALLEL PLANES 未知
公开(公告)号：GB2204145A
公开(公告)日：1988-11-02
申请号：GB8804040
申请日：1988-02-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOKOHAMA ITARU , CHIDA KAZUNORI , NODA JUICHI , HANAFUSA HIROAKI , TAKEUCHI YOSHIAKI , TATEDA MITSUHIRO
IPC分类号： G02B6/245 , G02B6/28 , G02B6/24
摘要： A fiber coupler includes first and second optical fiber groups and a fused-elongated region. The first optical fiber group is obtained by parallelly arranging a plurality of optical fibers on a single plane, a coating of each of the optical fibers being removed throughout a predetermined portion at the same position as that of an adjacent optical fiber in a longitudinal direction. The second optical fiber group is obtained by parallelly arranging adjacent optical fibers on a predetermined plane parallel to an arrange plane of the first optical fiber group at the same pitch as that of the first optical fiber group, a coating of each of the optical fibers being removed throughout a predetermined portion at the same position as that of an adjacent optical fiber in a longitudinal direction as the first optical fiber group. The fused-elongated region is located at a portion of the predetermined portions from which the coatings are removed and obtained by fusing/elongating at least some optical fibers of the first optical fiber group with at least some optical fibers of the second optical fiber group so that corresponding optical fibers are fused/elongated. A plane including centers of two cores of the optical fibers fused with each other at the fused-elongated region is arranged substantially perpendicular to the arrange planes of said first and second optical fiber groups, and at least a portion of the first and/or second optical fiber groups is a fiber ribbon obtained by integrally forming a plurality of optical fibers each having a core and a clad by a coating.

6. 发明专利

FR2512214A1 未知
公开(公告)号：FR2512214A1
公开(公告)日：1983-03-04
申请号：FR8214175
申请日：1982-08-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKAMOTO KATSUNARI , HOSAKA TOSHIHITO , SASAKI YUTAKA , NODA JUICHI , EDAHIRO TAKAO
IPC分类号： H01P3/16 , C03B37/012 , G02B6/024 , G02B6/10 , G02B5/16
摘要： A single-polarization single mode optical fiber of the type comprising an elliptical core, a pair of stress applying parts on both sides of the minor radius of the elliptical core for applying asymmetrical stress thereto and a clad embedding therein the core and the stress applying parts, the stress applying parts being made of B2O3 wherein a relative refractive index difference DELTA between the core and the clad satisfies a relation 0.004

7. 发明专利

DE3751865D1 未知
公开(公告)号：DE3751865D1
公开(公告)日：1996-09-05
申请号：DE3751865
申请日：1987-09-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJIWARA KOICHI , NODA JUICHI , MIZUTANI HIROMICHI , MIZUTANI HIROKO
IPC分类号： G01N21/51 , G01N33/543 , G01N33/58 , G01N35/00 , G01N35/10 , G01N33/553 , G01N33/537
摘要： Laser magnetic immunoassay of biological specimens comprises (1) subjecting the sample to antigen-antibody reaction with a magnetically labelled reagent (e.g. labelled by Fe or Co); (2) separating with antigen antibody complex and dispersing into suspension; (3) subjecting the suspension to the field from an electromagnet supplied with low-frequency (pref. 0.5Hz) current; and (4) passing a laser beam through the suspension and observing the scattering fraction.

8. 发明专利

DE3887840T2 未知
公开(公告)号：DE3887840T2
公开(公告)日：1994-09-22
申请号：DE3887840
申请日：1988-11-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOGUCHI YOSHIO , NAGAI HARUO , TAKADA KAZUMASA , NODA JUICHI
IPC分类号： G01M11/00 , H01L33/14 , H01L33/30 , H01L33/40 , H01L33/44 , H01S5/10 , H01L33/00 , H01S3/19

9. 发明专利

CA2025750A1 WIDE-BAND OPTICAL FIBER COUPLER AND ITS MANUFACTURING METHOD 未知
公开(公告)号：CA2025750A1
公开(公告)日：1991-03-21
申请号：CA2025750
申请日：1990-09-19
申请人： JAPAN AVIATION ELECTRON , NIPPON TELEGRAPH & TELEPHONE
发明人： SASAKI HIROYUKI , SHIMAMURA MASATO , TAKEUCHI YOSHIAKI , HANAFUSA HIROAKI , NODA JUICHI
IPC分类号： G02B6/28
摘要： Two optical fibers (11, 12) are reduced in diameter over a predetermined length to form reduced-diameter portions (13) whose center portions have different diameters. The first and the second optical fibers are intersected at a small angle to each other substantially centrally of their reduced-diameter portions and then are fused together at the intersecting portions and the fused portions of the first and second optical fibers are heated and stretched to provide an optical coupler having a desired coupling ratio.

10. 发明专利

GB2204145B FIBER COUPLER AND METHOD AND APPARATUS FOR MANUFACTURING THE SAME 未知
公开(公告)号：GB2204145B
公开(公告)日：1991-03-20
申请号：GB8804040
申请日：1988-02-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOKOHAMA ITARU , CHIDA KAZUNORI , NODA JUICHI , HANAFUSA HIROAKI , TAKEUCHI YOSHIAKI , TATEDA MITSUHIRO
IPC分类号： G02B6/245 , G02B6/28
摘要： A fiber coupler includes first and second optical fiber groups and a fused-elongated region. The first optical fiber group is obtained by parallelly arranging a plurality of optical fibers on a single plane, a coating of each of the optical fibers being removed throughout a predetermined portion at the same position as that of an adjacent optical fiber in a longitudinal direction. The second optical fiber group is obtained by parallelly arranging adjacent optical fibers on a predetermined plane parallel to an arrange plane of the first optical fiber group at the same pitch as that of the first optical fiber group, a coating of each of the optical fibers being removed throughout a predetermined portion at the same position as that of an adjacent optical fiber in a longitudinal direction as the first optical fiber group. The fused-elongated region is located at a portion of the predetermined portions from which the coatings are removed and obtained by fusing/elongating at least some optical fibers of the first optical fiber group with at least some optical fibers of the second optical fiber group so that corresponding optical fibers are fused/elongated. A plane including centers of two cores of the optical fibers fused with each other at the fused-elongated region is arranged substantially perpendicular to the arrange planes of said first and second optical fiber groups, and at least a portion of the first and/or second optical fiber groups is a fiber ribbon obtained by integrally forming a plurality of optical fibers each having a core and a clad by a coating.

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