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1. 发明专利

JPH05145090A OPTICAL COMMUNICATION SYSTEM 失效
公开(公告)号：JPH05145090A
公开(公告)日：1993-06-11
申请号：JP33437891
申请日：1991-11-22
申请人： NEC CORP
发明人： SAKUKAI MASASHI , UMEKI KAORU , ANDO HARUYASU
IPC分类号： G02B6/42 , H01L21/329 , H01L23/38 , H01L29/861 , H01L31/02 , H01L31/10 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67
摘要： PURPOSE:To improve the reception sensitivity of an optical communication system as well as to enlarge the allowable transmission loss of the optical communication system and to make it possible to extend the transmission distance of the system by a method wherein an avalanche photodiode which is arranged in an optical reception device has a mechanism for cooling a light- receiving module built in the optical reception device to control the temperature of the module. CONSTITUTION:An optical communication system is provided with an optical transmission device 1, an optical fiber cable 2 and a temperature control optical reception device 3 provided with a built-in Ge-APD module which is subjected to temperature control. The Ge-APD module 4 of the device 3 is fixed on a Peltier cooler 5 and the temperature of the cooler 5 is set an arbitrary temperature and is kept constant by a temperature control circuit 6. An electrical signal which is obtained from the module 4 is processed and decoded by a reception circuit 7. The module 4 is subjected to temperature control and is always kept at 25 deg.C. A dark current and a multiplication dark current, which are made to flow through the module 4 in this case, are reduced to about 1/10 compared to those in the case of 60 deg.C.

2. 发明专利

JPS62267710A FERRULE FOR OPTICAL CONNECTOR 失效
公开(公告)号：JPS62267710A
公开(公告)日：1987-11-20
申请号：JP11217686
申请日：1986-05-15
申请人： NEC CORP
发明人： UMEKI KAORU
IPC分类号： G02B6/36
摘要： PURPOSE:To easily fix an optical fiber to a ferrule in a short time, by previously filling up the narrow hole of the ferrule, into which the optical fiber is inserted, with solder. CONSTITUTION:A ferrule 1 is constituted of a capillary tube 2, terminal fittings 3 housed in one side of a hollow section 3a, and solder 4. The capillary tube 2 is formed of a ceramic material and driven into the terminal fittings 3 and its narrow-diameter hole having a diameter D is filled up with solder 4. The diameter D is made a little larger than that of an optical fiber 7 and the eccentricity of the narrow-diameter hole against the outer diameter A of the fittings 3 is set at or smaller than 1mum. After the ferrule 1 is kept by a heater composed of a V-groove 5 and keeping jig 6 and the solder 4 having a melting point of about 180 deg.C is melted by raising the temperature of the heater housed in the V-groove 5 to about 200 deg.C, the optical fiber 7 is inserted into the narrow hole of the capillary tube 7. After inserting the optical fiber 7, the ferrule 1 is removed from the heater. Thus the optical fiber 7 is fixed to the ferrule 1.

3. 发明专利

JPS61102604A Optical connector 失效
标题翻译：光学连接器
公开(公告)号：JPS61102604A
公开(公告)日：1986-05-21
申请号：JP22488284
申请日：1984-10-25
申请人： Nec Corp
发明人： TEZUKA KATSUHIRO , UMEKI KAORU
IPC分类号： G02B6/36 , G02B6/00 , G02B6/02 , G02B6/24 , G02B6/38
CPC分类号： G02B6/3821 , G02B6/3818
摘要： PURPOSE:To decrease optical loss by constituting terminal parts of a material having the etching rate higher than the etching rate of an optical fiber, projecting the end faces of the optical fibers by an etching treatment slightly from the terminal parts and butting the end faces to each other. CONSTITUTION:The terminal part 2 is constituted of the material which is more easily etched than the optical fiber 1. The end face of the optical fiber 1 and the terminal part 2 are polished to a specular surface state and are formed flush with each other. The end part is dipped for specified time in an etching liquid 3, then the end of the terminal part 2 projects slightly from the end of the terminal part 2 and a projecting part 5 is formed. The length of the projection is adjusted by the dipping time in the etching liquid. A pair of the optical fibers 1 and the terminal parts 2 having such end shapes are butted to each other and a precision sleeve 4 is packaged thereto, by which an optical connector is constituted. The space between the fibers 1 is therefore eliminated, by which the optical loss by the Fresnel reflection is decreased and operability is improved. The long-term stability is thus assured.
摘要翻译：目的：通过构成蚀刻速率高于光纤蚀刻速率的材料的端子部分来减少光损耗，通过蚀刻处理稍稍从端子部分突出光纤的端面，并将端面对接到彼此。构成：端子部2由比光纤1更容易蚀刻的材料构成。光纤1的端面和端子部2被抛光成镜面状态，并且彼此平齐。将端部在蚀刻液3中浸渍规定时间，然后端子部2的端部从端子部2的端部稍微突出，形成突出部5。通过蚀刻液中的浸渍时间来调节投影的长度。一对光纤1和具有这种端部形状的端子部件2彼此对接并且精密套筒4被封装在其中，由此构成光连接器。因此纤维1之间的空间因此被消除，由此通过菲涅耳反射的光学损耗降低并且可操作性得到改善。从而确保长期稳定。

4. 发明专利

JPH05241043A 失效
公开(公告)号：JPH05241043A
公开(公告)日：1993-09-21
申请号：JP7838992
申请日：1992-02-28
申请人： NEC CORP , NIPPON ELECTRIC ENG
发明人： UMEKI KAORU , ANDO HARUYASU , KOBAYASHI TEI
IPC分类号： G02B6/38 , G02B6/42 , H01S5/00 , H01S3/18
摘要： PURPOSE:To provide the optical semiconductor module which freely attachably and detachably connects an optical fiber connector without hindering optical coupling and simultaneously improves productivity. CONSTITUTION:This module has a receptacle housing 7 which is freely attachably and detachably engaged with the optical fiber connector at one end, an optical semiconductor package 6 which is disposed within the other end of this receptacle housing 7, a dielectric 3 which is pressed to the optical fiber on the optical fiber connector side within the receptacle housing 7, a hollow cylindrical member which internally holds this dielectric 3, and a sleeve member 4 which holds this hollow cylindrical member 12 and has a space for the optical fiber connector at its one end. A support member 5 which holds the sleeve member 4 and permits the forward and backward movement at a prescribed distance along the central axis is equipped in the receptacle housing 7. A spring member 10 which presses this supporting member 5 toward the side to be inserted with the optical fiber connector is equipped in the receptacle housing.

5. 发明专利

JPH04344606A PHOTODETECTING MODULE 失效
公开(公告)号：JPH04344606A
公开(公告)日：1992-12-01
申请号：JP11643291
申请日：1991-05-22
申请人： NEC CORP
发明人： MATSUMOTO KIYOTO , UMEKI KAORU , SAKUKAI MASASHI
IPC分类号： G02B6/42 , H01L31/0232
摘要： PURPOSE:To decrease the return light to an optical fiber by the reflection on the photodetecting surface of a photodetector. CONSTITUTION:This module has the optical fiber 1 and the photodetector 3 which optically couples the incident light beam A from the optical fiber 1 via a lens 2 and receives this light. The distance between the end face la of the optical fiber 1 and the main plane 2a of the lens 2 is designated as L1, the image magnification in the optical system of the photodetecting module as m and the numerical aperture of the optical fiber 1 as NA, then the optical fiber and the lens are so disposed in parallel that the spacing x between the central axis B of the optical fiber 1 and the central axis C of the lens 2 satisfies following equation: x>{L1/2(m+1)} tan(NA).

6. 发明专利

JPS6278507A OPTICAL CONNECTOR 失效
公开(公告)号：JPS6278507A
公开(公告)日：1987-04-10
申请号：JP21893285
申请日：1985-09-30
申请人： NEC CORP , NIPPON TELEGRAPH & TELEPHONE , FUJITSU LTD , HITACHI LTD
发明人： UMEKI KAORU , MATSUMURA FUMIO , SUGITA ETSUJI , SASAKURA KUNIHIKO , MASUKO TAKAYUKI , YOSHIYA TSUTOMU
IPC分类号： G02B6/38
摘要： PURPOSE:To simplify detaching and attaching work by linking a sliding frame to an adapter as said frame is combined with a plug. CONSTITUTION:A projection 14b in the vicinity of an elastic locking piece 14 is pushed up by projection parts 43a and 44a in the vicinity of the sliding frame. The tip of the elastic rocking piece 14 bends upwardly, and a locking claw 14a can advance over a projection formed before the recessed part 21a of the plug 20. As the insertion depth further increases, the upward bending of the elastic locking piece 14 is released because the projection 14b passes through the positions of the projections 43a and 44a. Then the locking claw 14a passes through the opening part 41 of the sliding frame 40, and drops in the recessed part 21a formed on the front surface of the plug 20. Due to the dropping of the locking claw 14a in the recessed part 21a, the adapter 10 and the plug 20 cannot advance and retreat, thereby completing the mechanical linkage of them.

7. 发明专利

JPS61132911A Optical connector plug 失效
标题翻译：光连接器插头
公开(公告)号：JPS61132911A
公开(公告)日：1986-06-20
申请号：JP25417784
申请日：1984-12-03
申请人： Nec Corp
发明人： MORIMOTO YOSHITAKA , UMEKI KAORU
IPC分类号： G02B6/36 , G02B6/38
摘要： PURPOSE: To obtain an inexpensive non-reflection connector which permits the use of a general adapter by inserting and fixing a capillary having an optical fiber at the center into a tapered cylindrical member and projecting slightly the front end of the fiber.
CONSTITUTION: The front end of the cylindrical member 7 of an optical connector plug is tapered. The capillary 6 inserted and fixed with the optical fiber 5 in a tube is inserted and fixed to the center of the member 7. The front end of the capillary 6 is projected from the member 7. Since the front end of the member 7 is tapered, the front end of the fiber 5 is in the same position as the capillary 6 or is slightly projected therefrom. The connection of the fibers 5 to each other is thereby made possible and therefore there is no spacing at the fiber ends and the non-reflection connection is attained. The inexpensive connector is obtd. as the general adapter is usable.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了获得廉价的非反射连接器，其允许通过将具有中心的光纤的毛细管插入并固定到锥形圆柱形构件中并使光纤的前端稍微突出来使用通用适配器。构成：光连接器插头的圆柱形构件7的前端是锥形的。将插入并固定在管中的光纤5的毛细管6插入并固定到构件7的中心。毛细管6的前端从构件7突出。由于构件7的前端是锥形的纤维5的前端处于与毛细管6相同的位置，或稍微从其突出。由此，纤维5彼此的连接成为可能，因此在纤维端部没有间隔，并且获得了非反射连接。廉价的连接器是可以接受的。因为通用适配器是可用的。

8. 发明专利

JPS6199107A Manufacture of optical fiber array 失效
标题翻译：光纤阵列的制造
公开(公告)号：JPS6199107A
公开(公告)日：1986-05-17
申请号：JP22173584
申请日：1984-10-22
申请人： Nec Corp
发明人： UMEKI KAORU
IPC分类号： G02B6/00 , G02B6/04 , G02B6/08
摘要： PURPOSE: To array optical fibers with high working property by inserting the optical fibers into a ferrule having a taper-like guide hole and grinding the ferrule until the whole leading end of the optical fibers appears on the surface.
CONSTITUTION: Optical fibers 1 are inserted into holes of a plane plate 2 into which a string of holes having the diameter larger than the outer diameter D of each optical fiber 1 are formed. Then, the optical fibers 1 are inserted into the ferrule 3. The shape of the hole of the ferrule 3 on the section vertical to the optical axis direction is a rectangle and its inwall is formed like a taper. The rectangle of the leading hole of the ferrule 3 is formed by the side slightly shorter than the outer diameter D of the optical fiber 1 and the side slightly shorter than N×D (N is the number of optical fibers). The optical fibers 1 are arrayed as a string inside the ferrule 3 without any gap. Then, the leading end of the ferrule 3 is ground until the section of the optical fibers 1 appear.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过将光纤插入具有锥形引导孔的套圈中并研磨套圈，直到光纤的整个前端出现在表面上为止，对具有高加工性能的阵列光纤。构成：将光纤1插入平板2的孔中，形成直径大于各光纤1的外径D的一排孔。然后，将光纤1插入到套圈3中。套筒3的与光轴方向垂直的部分的孔的形状为矩形，其内壁形成为锥形。套圈3的引导孔的矩形由比光纤1的外径D短且短于NXD（N为光纤数）的一侧形成。光纤1在套圈3内没有任何间隙地排列成串。然后，将套圈3的前端磨成直到光纤1的一部分出现。

9. 发明专利

JPH0359504A LIGHT RECEIVING MODULE 失效
公开(公告)号：JPH0359504A
公开(公告)日：1991-03-14
申请号：JP19423389
申请日：1989-07-28
申请人： NEC CORP
发明人： UMEKI KAORU
IPC分类号： G02B6/32 , G02B6/42 , H01L31/0232
摘要： PURPOSE:To obtain stable light receiving sensitivity and multiplication factor even when an incident light position to an APD is deviated by specifying a relation of a distance between an avalanche photodiode and a lens principal plane, and a distance between an optical fiber and the lens principal plane. CONSTITUTION:A lens 12 is arranged on an optical axis between an avalanche photodiode (APD) 13 and an optical fiber 11, and couples them optically. In this state, at the time of light-reception, a light beam emitted from the optical fiber 11 is condensed through the lens 12, and made incident on the light receiv ing surface of the APD 13. In this case, the relation of the light receiving diame ter D of the APD 13 and the diameter (a) of the core diameter 14 of the optical fiber 11 is set to D >= (a), and also, the relation of a distance L1 between the APD 13 and the lens 12 principal plane, and a distance L2 between the optical fiber 11 and the lens 12 principal plane is set as D/a>=¦L1/L2¦=m>=1 (m : multipli cation factor). In such a manner, even in the case an incident light position is deviated by setting the light receiving surface of the APD 13, stable light receiving sensitivity and multiplication factor are obtained.

10. 发明专利

JPH02244010A TERMINAL STRUCTURE OF OPTICAL CONNECTOR 失效
公开(公告)号：JPH02244010A
公开(公告)日：1990-09-28
申请号：JP6346489
申请日：1989-03-17
申请人： NEC CORP , NIPPON ELECTRIC ENG
发明人： YAMAUCHI KENJI , UMEKI KAORU , OKI TAKESHI
IPC分类号： G02B6/36
摘要： PURPOSE:To prevent the stiffening of an optical fiber by the penetration of an adhesive agent and the breakage arising therefrom by press-fitting a press- fitting sleeve onto a slit sleeve by which a tensile fiber can be mechanically fixed. CONSTITUTION:The slit sleeve 12 provided with slitting parts 12a in the axial direction is put on the tensile fiber 13 and optical fiber jacket 14 of the optical fiber covering the rear end of a ferrule 10 and the press-fitting sleeve 16 having the inside diameter slightly smaller than the outside diameter of the part pro vided with the slitting parts 12a of the slit sleeve 12 is press-fitted onto the outer periphery of slit sleeve 12 from the rear. The slit sleeve 12 is surely brought into contact with the optical fiber jacket 14 by this press-fitting by which the jacket is mechanically fixed; in addition, the sure fixing by the adhe sive 15 is attained as well. The need for applying the adhesive directly on the tensile fiber is eliminated in this way and the stiffening of the optical fiber by the penetration of the adhesive and the breakage arising therefrom are prevented.

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