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1. 发明专利

JPH05313038A OPTICAL FIBER COUPLER 失效
公开(公告)号：JPH05313038A
公开(公告)日：1993-11-26
申请号：JP11305792
申请日：1992-04-06
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： KOBATA NOBUO
IPC分类号： G02B6/28
摘要： PURPOSE:To make a wavelength characteristic flat, uniform the output ratio of each output port and facilitate connection with an external circuit because of the fixed outer diameter of optical fibers for input-output ports. CONSTITUTION:Input-output port optical fibers 5-1, 5-2 with approximately equal propagation constants and a dummy optical fiber 5-3 are arranged and subjected to drawing and fusion to form a coupling part according to the conventional method. That is, the optical fibers 5-1, 5-2 of the approximately same outer diameter are used for input ports 11-1, 11-2 and output ports 12-1, 12-2, but the dummy optical fiber 5-3 is not used for signal transmission. With such constitution, the mutual coupling between the optical fibers of approximately equal propagation constants is made wide-band effectively as in the case of coupling optical fibers of different propagation constants by the presence of the dummy optical fiber 5-3.

2. 发明专利

JPS6468705A MANUFACTURE OF MULTIFIBER OPTICAL DISTRIBUTOR 失效
公开(公告)号：JPS6468705A
公开(公告)日：1989-03-14
申请号：JP22549187
申请日：1987-09-09
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： KOBATA NOBUO , AMANO KAZUYA , ISHIKAWA TOSHIO
IPC分类号： G02B6/28
摘要： PURPOSE:To eliminate damage and dust sticking and to array and arrange optical fibers concentrically by dipping tip parts of the optical fibers into an organic solvent and bundling the tip parts of the optical fibers before and after a process wherein an adhesive is injected among the optical fibers and cured by being heated to maintain the concentric circular state. CONSTITUTION:The coat of an optical fiber 2 nearby their tips are removed, and the coated ends are bundled in order concentrically with a thread 3 and inserted into a pipe 4. Then the tip parts of the optical fibers 2' are dipped in the organic solvent 5 and inserted into a pipe 6 in a bundle by surface tension and then the adhesive 7 is injected nearby the pipe 4, so that the adhesive permeates among the optical fibers 2' by capillarity. When the adhesive reaches a proper position, the adhesive is heated by a heater 8 to cure partially and stopped from permeating, the thread 3 and pipe 6 are removed after the adhesive cures, and the tip parts of the optical fibers are dipped again in the organic solvent 5 and cleaned with an ultrasonic wave, thereby removing sticking dust. Consequently, the optical fibers are arrayed concentrically without damaged nor dust sticking.

3. 发明专利

JPS6459306A MANUFACTURE OF OPTICAL DISTRIBUTOR 失效
公开(公告)号：JPS6459306A
公开(公告)日：1989-03-07
申请号：JP21748387
申请日：1987-08-31
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： KOBATA NOBUO , SUGI KAZUNARI , FURUKAWA HARUYOSHI
IPC分类号： G02B6/28
摘要： PURPOSE:To simplify the working process, and also, to obtain an optical distributor whose loss is low and which scarcely causes a variance, by heating and welding a pair of optical fiber bundles which are tapered, by allowing the taper waist parts to oppose each other, and also, heating and drawing them. CONSTITUTION:End parts 2 of an optical fiber bundle 1 are bundled, heated and drawn, welded as one body, and tapering is executed until its taper waist part 5 is cut. That is, to each optical fiber bundle 1 of both sides for placing a connected point 8 between, a light source and a monitor are connected, respectively, and while monitoring a state of a loss and a variance, its connected point 8 is brought to tapering. A pair of optical fiber bundles 1 which are manufactured in the same way are opposed to each other, heated and welded, and connected, and its connected point 8 is further heated and drawn. In such a way, an optical distributor which can be manufactured comparatively easily and whose loss is low is obtained.

4. 发明专利

JPS63172105A PRODUCTION OF OPTICAL DISTRIBUTOR 失效
公开(公告)号：JPS63172105A
公开(公告)日：1988-07-15
申请号：JP301687
申请日：1987-01-09
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： KOBATA NOBUO
IPC分类号： G02B6/28
摘要： PURPOSE:To permit formation of a thin clad on the inside of an optical distributor with simple stages by alternately repeating the stages for welding the end of plural arrayed and disposed optical fibers, and the stage for immersing the welded end thereof into hydrofluoric acid and dissolving the clads of the optical fibers to reduce the thickness thereof. CONSTITUTION:The respective optical fibers 2 are arrayed, disposed and bundled to form an optical fiber bundle 1. The fiber bundle is lightly tapered by heating with gaseous oxyhydrogen and the side faces of the respective fibers 2 are lightly welded to each other to form tapered parts 5 in such a manner that spacings 6 remain between the fibers 2 and 2. The temp. of the gaseous oxyhydrogen is kept slightly low to prevent the complete welding of the side faces of the fibers 2. The waist part AA' of the tapered parts 5 is then cut and the cut end 8 of the tapered part is immersed into the hydrofluoric acid 9. The hydrofluoric acid 9 is passed through the spacings 6 formed between the fibers 2 and 2 and is penetrated upward by capillarity and, therefore, the inner clads 4 are more dissolved by the hydrofluoric acid. The depth of the tapered part 5 to be immersed is controlled according to the condition of the penetration. The thickness of the outer clad is thereby assured.

5. 发明专利

JPS6010602B2 失效
公开(公告)号：JPS6010602B2
公开(公告)日：1985-03-19
申请号：JP2269878
申请日：1978-02-27
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： KUROSAWA NOBORU , TAMAGAWA TERUHISA , KOBATA NOBUO
IPC分类号： G02B6/32

6. 发明专利

JPS59114513A Light distributor for polarization plane preservative optical fiber 失效
标题翻译：用于偏光平面保护光纤的光分布器
公开(公告)号：JPS59114513A
公开(公告)日：1984-07-02
申请号：JP22559082
申请日：1982-12-22
申请人： Showa Electric Wire & Cable Co Ltd
发明人： KOBATA NOBUO
IPC分类号： G02B6/024 , G02B6/28 , G02B6/293
CPC分类号： G02B6/2804
摘要： PURPOSE:To obtain a light distributor for polarization plane preservative optical fibers which is less in optical coupling loss, by connecting plural deformed cores arranged in a coupling base section with the ellipsoidal core of a plane of polarization plane preservative optical fiber to be optically coupled with the former with the direction of length of the deformed cores and line of apsides of the ellipsoidal core coinciding with each other. CONSTITUTION:The circular cores of branched fibers 2 are deformed to semi-circular deformed cores 2a' in a coupling base section 3 and connected with the core 4a having an ellipsoidal cross section of polarization plane preservative optical fiber 4 with the line of apsides of the core 4a coinciding with the direction of length of the deformed cores 2a. When a polarized light which is normal to a plane containing the branched fibers 2 and 2 is irradiated upon the end face of one of the branched fibers 2 of an light distributor 1, the polarized light enters into the ellipsoidal core 4a with the direction of polarization (shown by the arrow) being preserved after passing through the circular core 2a and deformed core 2a' and the polarized light is transmitted through the fiber 4 without receiving any considerable amount of loss in optical coupling. In the same manner, a polarized light sent from the fiber 4 enters into the deformed core 2a' from the ellipsoidal core 4a and is transmitted through the branched fibers 2 without receiving any considerable amount of loss in optical coupling.
摘要翻译：目的：为了获得光耦合损耗较小的偏振面防光光纤配光器，通过将耦合基座中布置的多个变形芯与偏振面保护光纤平面的椭圆芯连接，与光耦合前者具有变形的芯的长度方向和椭圆形芯的侧面的线相互重合。构成：分支纤维2的圆形芯变形为耦合基部3中的半圆形变形芯2a'，并与具有偏振面保护光纤4的椭圆形截面的芯4a连接，芯部4a与变形的芯部2a的长度方向一致。当与包含分支纤维2和2的平面垂直的偏振光照射在光分布器1的分支光纤2之一的端面时，偏振光以偏振方向进入椭圆形芯4a （箭头所示）在通过圆芯2a和变形芯2a'之后被保持，并且偏振光透射通过光纤4，而不会在光耦合中接收到任何相当大的损耗。以相同的方式，从光纤4发送的偏振光从椭圆形芯4a进入变形芯2a'，并通过分支光纤2传输，而不会在光耦合中产生大量的损耗。

7. 发明专利

JPS57198424A OPTICAL COUPLING PART 失效
公开(公告)号：JPS57198424A
公开(公告)日：1982-12-06
申请号：JP8271481
申请日：1981-05-30
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： KOBATA NOBUO
IPC分类号： G02B6/26 , G02B6/28
摘要： PURPOSE:To reduce the penetration loss of an optical coupling part by constricting a part of a taper structure whose diameter is gradually contracted in proportion to access to the end surface of the optical coupling part to make it easy to return light power once penetrated into a clad part again to a core. CONSTITUTION:A constricted part 3 is formed on a part of a taper of an photocoupler which forms a taperlike shape by surrounding the intermediate part between two core layers 2 and the periphery of the core layers with clad layers 1. When light falls upon an end surface 4 of the taper part at a mode A and advances in a thick part, optical power penetrated from the clad layer 1 on the intermediate part between the two core layers into the core layers 2 is larger than the light leaked and lost from the core layer 2 in the constricted part and the light transmitted into the core part 2 reduces its penetration loss as shown by hatched part in the optical distribution B.

8. 发明专利

JPS57186718A OPTICAL FIBER CONNECTING DEVICE 失效
公开(公告)号：JPS57186718A
公开(公告)日：1982-11-17
申请号：JP7140781
申请日：1981-05-14
申请人： SHOWA ELECTRIC WIRE & CABLE CO , CENTRAL MOTOR WHEEL CO LTD
发明人： KOBATA NOBUO , SASANO NAONARI , KATAOKA NORIYOSHI
IPC分类号： G02B6/24 , G02B6/255 , G02B6/38
摘要： PURPOSE:To facilitate centering during the connection of an optical fiber enabling an optical fiber connection part to be observed horizontally and vertically at the same time through one objective lens. CONSTITUTION:A connecting device consists of a light source 11 arranged horizontally behind an optical fiber connection part 1, and relay lens 12 and 13, mirrors 14, 15 and 16, an objective lens 17, and an eyepiece 18 movable in an (x) axis, an (y) axis, and a (z) axis. An image A of the optical fiber connection part 1 is formed at the focal point of the relay lens 12, and the real image of the original image A is formed at the focal point of the relay lens 13. The focal lengths of the relay lenses 12 and 13 and the angles of the mirrors 14, 15 and 16 are adjusted adequately to set the focal point of the relay lens 13 at a position A shifted slightly from the original image A. The original image A and real image A' are observed through an objective lens 17 at the same time.

9. 发明专利

JPS57166087A SUBSTRATE DEVICE 失效
公开(公告)号：JPS57166087A
公开(公告)日：1982-10-13
申请号：JP5023181
申请日：1981-04-03
申请人： TOKYO SHIBAURA ELECTRIC CO , SHOWA ELECTRIC WIRE & CABLE CO
发明人： SHIYOUROJI KENJI , YAMAZAKI ETSUO , KOBATA NOBUO
IPC分类号： H05K1/02 , G02B6/122 , G02B6/42 , H01L31/02 , H01L31/12 , H01L33/48 , H05K7/02
摘要： PURPOSE:To manufacture a substrate device provided with the functions similar to the electric wiring having no regard for the thermal effect on the electric elements by a method wherein the circuit substrate is wired making use of optical fiber. CONSTITUTION:A hole 2 is perforated into the substrate board 1 to insert the circuit unit. The groove 3 to finish the periphery 2a of said hole 2 and to insert the circuit unit into said hole 2 and the other tapered groove 4 to tighten said circuit unit rotatively are formed. Besides the prisms 5 to be the photojoints are provided on the bottom of said hole 2 and the photoconductive wave guides 6 are abutted against said prisms. Next the electric element to be fixed to said board 1 is contained inthe case 7 comprising the container 7a and the cover 7b and said container 7a is made cylindrical to be inserted into said hole 2 and the side 8a is smoothed down. Besides the photomodulation elements 9 making the light signals enter into said hole 2 obliquely against said guides 6 are provided corresponding to said prisms 5 on the side 8b located lower than the side 8a to transmit the output of the contained element from said photoconductive wave channel 6.

10. 发明专利

JPS5551230A FLAME DETECTING DEVICE 失效
公开(公告)号：JPS5551230A
公开(公告)日：1980-04-14
申请号：JP12435178
申请日：1978-10-09
申请人： SHOWA ELECTRIC WIRE & CABLE CO , SHODEN CORP
发明人： KUROSAWA NOBORU , KOBATA NOBUO , TSURUZONO MASAAKI
IPC分类号： F23N5/08
摘要： PURPOSE:To enable to monitor a condition of ignition safety and reliably by inserting a heat-light converting member, emitting light by heat of a flame, into a flame and detecting the light optically. CONSTITUTION:A heat-light converting member 3 consisting of a stainless plate or rod, for example, is disposed in a flame 2 generated by a gas burner 1. Radiation caused by glowing of said member 3 is induced into a light-electricity converting member 7 consisting of a photo-transistor and the like by a light guide member 6 consisting of a glass rod 4, the tip of which is rounded like as a lense, and a photoconductive tube 5 consisting of bound optical fibers, thereafter, the output of the member 7 is processed in a processor 8 consisting of a switching transistor, relays and the like so as to indicate by an alarm lamp 9 turning on and off, for example. According to this method, a consition of ignition of the burner may be detected safely and surely at a place remote from the burner.

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