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41. 发明专利

JPH0720334A MOUNTING STRUCTURE FOR QUARTZ OPTICAL WAVEGUIDE SUBSTRATE IN OPTICAL CHANGEOVER SWITCH MODULE 失效
公开(公告)号：JPH0720334A
公开(公告)日：1995-01-24
申请号：JP14649193
申请日：1993-06-17
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KUROSAWA KIYOSHI , UTSUNOMIYA JIRO , KAWASHIMA TOSHIYUKI , IIDA SABURO , NAGASE AKIRA , HIMENO AKIRA , OKUNO MASAYUKI , KATO KUNIHARU
IPC分类号： G02B6/122 , C03B20/00 , H05K1/02
摘要： PURPOSE:To provide a mounting device for quartz optical waveguide substrate in optical changeover switch module capable of relaxing stress generated by the difference of coefficient of linear expansion. CONSTITUTION:The quartz optical waveguide substrate 10 is mounted on the surface of a ceramic substrate 11 by inserting a panel 13 formed of a material having the coefficient of linear expansion between the quartz optical waveguide substrate 10 and the ceramic substrate 11, for instance, CuW or AlN of a material having the coefficient of linear expansion 3-7X10 / deg.C.

42. 发明专利

JPH06347670A OPTICAL WIRING COMPONENTS 失效
公开(公告)号：JPH06347670A
公开(公告)日：1994-12-22
申请号：JP13809993
申请日：1993-06-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGASE AKIRA , HIMENO AKIRA , KATO KUNIHARU , OKUNO MASAYUKI
IPC分类号： G02B6/36 , G02B6/40
摘要： PURPOSE:To provide optical wiring components easily realizing connection between optical components with high density and facilitating the mounting of plural pieces of optical components to a substrate, etc. CONSTITUTION:In the optical wiring components provided with plural pieces of input multi-fiber collective optical connectors 2a, 2b and plural pieces of output side multi-fiber collective optical connectors 3a, 3b, whose input parts 2a, 2b are connected with the output parts 3a, 3b by plural pieces of optical fiber core wires 1a, 1b and whose arrangement of respective optical core wires 1a of the input side and the output side are arranged in order different from each other, the optical core wire 1b parts arranged in parallel in the vicinity of an optical fiber array capable of being fused collectively for the multi-fiber collective optical connectors 2a, 2b, 3a, 3b are coated collectively and reinforced, and on the other hand, the coated optical fiber 1a of parts mutually intersecting by the revision of the arrangement from the input part side to the output part side are reinforced by coating at every one optical fiber.

43. 发明专利

JPH0588802B2 失效
公开(公告)号：JPH0588802B2
公开(公告)日：1993-12-24
申请号：JP2897286
申请日：1986-02-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJII YOJI , KATO KUNIHARU , NISHI NORIO
IPC分类号： G02F1/23 , G02B6/12 , G02B6/122 , G02B6/293 , G02B6/34 , G02F1/25 , G02B6/28

44. 发明专利

JPH03265803A ASSEMBLING AND FIXING JIG FOR OPTICAL MULTIPLEXING AND DEMULTIPLEXING DEVICE 失效
公开(公告)号：JPH03265803A
公开(公告)日：1991-11-26
申请号：JP6424690
申请日：1990-03-16
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KONO TSUTOMU , KIRIYAMA TOSHIKATSU , KATO KUNIHARU
IPC分类号： G02B6/293 , G02B6/36
摘要： PURPOSE:To prevent the generation of positional and angular shifts by forming small holes in semicylindrical grooves and at a prism mounting position, providing a pin which serves as a stopper in the direction of an optical axis and setting a cylindrical sleeve in the semicylindrical groove, and performing vacuum deposition after a prism is mounted. CONSTITUTION:A lens 12 is incorporated in the cylindrical sleeve 1, which is machined to an accurate external diameter and an accurate internal diameter and coaxial with the lens 12. The assembling and fixing jig 11 is formed of the cylindrical sleeve 1, the semicylindrical groove 4 where the prism 2 is mounted, and the stopper 6 for positioning the prism 2, and the semicylindrical groove 4 is accurately machined with high density so that optical axes are aligned with each other. Further, the small holes 5 for vacuum suction are formed in the semicylindrical grooves 4 and at the position where the prism 2 is mounted and penetrate the assembling and fixing jig 11 to connect with a vacuum pump coupling nozzle 10. Consequently, the generation of positional and angular shifts are prevented.

45. 发明专利

JPH03172801A LENS FOR OPTICAL COUPLING 失效
公开(公告)号：JPH03172801A
公开(公告)日：1991-07-26
申请号：JP31060389
申请日：1989-12-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATO KUNIHARU , NISHI NORIO , UEOKA YASUSHIGE
IPC分类号： G02B6/32 , G02B3/02 , G02B6/42 , G02B13/18
摘要： PURPOSE:To couple the optical semiconductor laser beam of large flatness rate of radiation angle at a low loss to a single mode optical fiber by varying the radii of curvature of two pieces of reference spherical faces which pass the intersected point of a lens face and an optical axis and the outermost peripheral position effective as a lens on the lens face and intersect orthogonally with each other. CONSTITUTION:The image magnification M of the lens 5 is varied in horizontal and vertical directions and is set to convert the flat spot in the exit part 4a of the optical semiconductor laser 4 to a spot of the same shape as the circular shape of the incident end face 3a of an optical fiber 3 on the end face 3a by the lens 5 for optical coupling. Two pieces of the reference spherical faces (m), (n) in the horizontal and vertical directions passing the optical axis S and the outermost peripheral position (j) effective as a lens on the lens face 5a are so varied that the radius of (m) is maximized and the radius of (n) is minimized. The numerical aperture (NA) of the exit side lens face 5b of the lens 5 is made the same in the vertical and horizontal directions at the max. NA. The exit light from the distortion quantum well type optical semiconductor laser is coupled with low loss to the single mode optical fiber.

46. 发明专利

JPH03129306A OPTICAL COUPLER AND ITS MANUFACTURE 失效
公开(公告)号：JPH03129306A
公开(公告)日：1991-06-03
申请号：JP26621789
申请日：1989-10-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATO KUNIHARU , NISHI NORIO
IPC分类号： G02B6/42
摘要： PURPOSE:To obtain the small-sized optical coupler which consists of a small number of components, requiring not so much adjustment, and has small coupling loss by uniting one laser diode and one lens and converging light on an optical fiber by using the lens. CONSTITUTION:A polarizing element 12 and a ferrule 13 where the optical fiber is fixed are arranged at specific positions of a casing 11 with normal accuracy which allows easy working. Lenses 17A and 17B are fixed in package main bodies 16A and 16B and stems 20A and 20B where laser diodes 18A and 18B are fixed thereto after being adjusted so that the optical axes of lenses 17A and 17B are almost aligned with the active layers of the laser diodes 18A and 18B. In this case, when the optical axes are adjusted with about

47. 发明专利

JPH02239211A OPTICAL SEMICONDUCTOR ELEMENT MODULE AND METHOD FOR ADJUSTING AND ASSEMBLING THIS MODULE 失效
公开(公告)号：JPH02239211A
公开(公告)日：1990-09-21
申请号：JP5975489
申请日：1989-03-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATO KUNIHARU , NISHI NORIO , UEOKA YASUSHIGE
IPC分类号： G02B6/42
摘要： PURPOSE:To simplify the stage for adjustment and assembly by fixing an optical semiconductor element to a predetermined fixing position of a holding member and positioning an optical fiber in such a manner that exit light is coupled with prescribed light intensity to the end face of the optical fiber, thereby fixing the element to the holding member. CONSTITUTION:The cylindrical holding member 10 having a prescribed length, a lens 20 for condensing fixed between both ends thereof, the optical semiconductor element 6 fixed on one end side of the holding member 10, and the optical fiber 1 fixed on the other end are provided. The position adjustment of the optical semiconductor element 6 with the lens 20 is not executed in the optical axis direction of the lens 20 and in the direction perpendicular to the optical axis and the optical semiconductor element 6 is fixed to the preset position of the holding member 10. The optical fiber 1 is moved in the direction perpendicular to the optical axis of the lens 20 and is fixed to the holding member 10 in such a manner that the light emitted from the optical semiconductor element 6 and condensed by the lens 20 is coupled with the prescribed light intensity to the end face of the optical fiber 1. The stage for the adjustment and assembly is simplified in this way.

48. 发明专利

JPH02135306A LASER DIODE MODULE 失效
公开(公告)号：JPH02135306A
公开(公告)日：1990-05-24
申请号：JP28956388
申请日：1988-11-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NISHI NORIO , NAGAOKA SHINJI , KATO KUNIHARU
IPC分类号： G02B6/42 , G02B27/28 , H01S5/00
摘要： PURPOSE:To form the small-sized, high-density laser diode module by collimating projection light beams together by an optical waveguide for interval conversion and then transmitting them through one optical isolator. CONSTITUTION:The interval converting waveguide 3 is provided between the laser diode array 1 of the laser diode module and a collimator lens 6 and the laser beams projected from individual waveguide optical paths of laser diodes are converged on the center part while narrowed down in beam interval. Then, the converged laser beams are passed nearby the optical path of the collimator lens 6 and the projection light of the laser array 1 consisting of the laser diodes is processed by one collimator lens 6 and one optical isolator 7. Consequently, the small-sized, high-density laser diode module is formed.

49. 发明专利

JPH0271205A OPTICAL MULTIPLEXER/DEMULTIPLEXER 失效
公开(公告)号：JPH0271205A
公开(公告)日：1990-03-09
申请号：JP7199089
申请日：1989-03-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NISHI NORIO , KATO KUNIHARU
IPC分类号： G02B6/293 , G02B6/42
摘要： PURPOSE:To obtain optimum coupling between an optical fiber and a light receiving element and to decrease the number of parts so as to simplify the stage for assembly by adjusting the positions of a ferrule in the optical axis direction, a ferrule holder in the direction perpendicular to the optical axis, and a 2nd lens holder within the plane perpendicular with the optical axis, respectively. CONSTITUTION:This multiplexer/dimultiplexer has a light emitting element 19, a 1st lens 21, a 1st lens holder 22, the optical fiber 24, the ferrule 26, the ferrule holder 28, an interference filter 34, the light receiving element 38, a 2nd lens holder 42, and a 2nd lens 43. A ferrule insertion hole 29 is provided to the ferrule holder 28 in order to allow the position adjustment in the optical axis direction. The end face 31 of the ferrule holder 28 and the end face23 of the 1st lens holder 22 are provided perpendicularly to the optical axis in order to allow the position adjustment in the direction perpendicular to the optical axis. The adjustment of the optical axis in the state of holding the two faces in contact with each other is thus possible. Further, the position of the 2n lens holder is adjustable on the plane parallel with the optical axis of the optical fiber 24 within a 2nd lens holder mounting part 33. A simple structure is thus formed and the assembly thereof is facilitated.

50. 发明专利

JPH0254207A OPTICAL MULTIPLEXER/DEMULTIPLEXER 失效
公开(公告)号：JPH0254207A
公开(公告)日：1990-02-23
申请号：JP20595288
申请日：1988-08-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KATO KUNIHARU , NISHI NORIO
IPC分类号： G02B6/28 , G02B6/42
摘要： PURPOSE:To contrive the reduction of the number of parts, the shortening of an optical path length, the simplification of construction and miniaturization by setting the ratio of the distance from the main face of a lens to the light incident/exit end face of an optical fiber and the distance from the main face of the lens to the light exit end face of a 1st photosemiconductor element to nearly 1. CONSTITUTION:One piece of spherical lens 24 is commonly used as the lens for condensing the exit light from the light incident/exit end face 25a of the optical fiber 25 and the lens for condensing the exit light from the light exit end face 28a of a laser diode (LD) 28. An optical multiplexer/demultiplexer holder 21 having a prescribed length is simultaneously used as the base material for supporting the optical multiplexer/demultiplexer and the positions where the light incident/exit end face 25a of the optical fiber 25 and the light exit end face 28a of the LD 28 are fixed in the optical axis direction are so set that the image magnification of the spherical lens 24 attains nearly 1. The need for optical parts such as polygonal prisms having special shapes is eliminated in this way. The reduction of the number of parts, the shortening of the optical path length and the miniaturization are contrived and the easy assembly is enabled.

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