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1. 发明专利

JPH08160235A PLANE LIGHT GUIDE CIRCUIT WITH POSITIONING MARKER 失效
公开(公告)号：JPH08160235A
公开(公告)日：1996-06-21
申请号：JP30525694
申请日：1994-12-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MORINAKA AKIRA , HANABUSA HIROAKI , OGUCHI TAISUKE , SENDA KAZUNORI , TAKATO NORIO , ATOBE NAOYUKI , NAKAO NAOKI , OHIRA FUMIKAZU , KOYABU KUNIO , KUDO KAZUKI , MATSUNAGA KOJI
IPC分类号： G02B6/30 , G02B6/122
摘要： PURPOSE: To provide a plane light guide circuit capable of being easily roughly aligned. CONSTITUTION: The plane light guide circuit 11 with a positioning marker is constituted by providing a light guide 15 for the marker to an underclad 13 on a substrate 17 across a core part 13 and providing an overclad 14 on it. Marker light is made incident from an input part 15 on the flank of the plane light guide circuit 11, projected from an end surface 16A of the light guide for the positioning marker, and made incident on the core part of a fiber block array gripped on an aligning device, thus performing alignment.

2. 发明专利

JPH07248275A METHOD AND APPARATUS FOR INSPECTING LIGHT CIRCUIT PART 失效
公开(公告)号：JPH07248275A
公开(公告)日：1995-09-26
申请号：JP3840494
申请日：1994-03-09
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HANABUSA HIROAKI , SENDA KAZUNORI , OGUCHI TAISUKE , TAKATO NORIO , MORINAKA AKIRA , TAKADA KAZUMASA
IPC分类号： G01M11/00
摘要： PURPOSE:To automatically inspect all of optical characteristic inspection items containing the absolute value of the insertion loss of a light circuit part. CONSTITUTION:The light output from a light source is branched into two lights by a light coupler and one of the branched lights is passed through a light circuit part being a sample and the other one of them is not passed through the sample and the respective light outputs are measured by two light power meters to calculate the absoloute value of insertion loss.

3. 发明专利

JPH0712680A AUTOMATICALLY MEASURING APPARATUS FOR OPTICAL COMPONENT 失效
公开(公告)号：JPH0712680A
公开(公告)日：1995-01-17
申请号：JP18090293
申请日：1993-06-25
申请人： FURUKAWA ELECTRIC CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ITO YOSHIHISA , YORINARI HIROSHI , KAWAZOE HIDEYO , SENDA KAZUNORI , HANABUSA HIROAKI
IPC分类号： B65H43/08 , G01M11/00 , H01L33/58 , H01L33/00
摘要： PURPOSE:To efficiently measure optical characteristics of a plurality of optical components having a plurality of input/output ports with a concise structure and high operability of measurement. CONSTITUTION:The optical component automatic measuring apparatus comprises an incident port side switching unit 4 which can simultaneously switch a light source 1 and a plurality of incident ports 3 of an optical component 2 to be inspected, and an emitting port side switching unit 7 which can simultaneously switch a photoreceiver 6 and a plurality of emitting ports 5 of the component 2. An emitting end face 8 of the port 5 side of the component 2 is obliquely set. An emitting side master fiber 9 of the unit 7 of the component 2 is formed in a large bore fiber. A SELFOC lens is disposed on the emitting side of the unit 7.

4. 发明专利

JPH03103342A COATING OF OPTICAL FIBER 失效
公开(公告)号：JPH03103342A
公开(公告)日：1991-04-30
申请号：JP10412790
申请日：1990-04-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SENDA KAZUNORI , KIMURA TAKAO
IPC分类号： G02B6/44 , C03C25/10
摘要： PURPOSE:To uniformize thickness of coated film even in high-speed drawing by analyzing factors such as nozzle dimension of pressurized die and viscosity of coating material and specifying relation between radius of optical fiber and said factors in forming plastic coating layer on optical fiber under pressure. CONSTITUTION:Optical fiber 3 is introduced into a pressurizing die 1 having funnel-shaped inside and a nozzle 2 at attenuating top end and liquid plastic coating material 4 is applied. In said process, outer diameters R1 and R3 of fiber before coating (3) and after coating (8) are measured and difference of the two is compared to output of coating film thickness setting device 16, then pressure P higher than atmospheric pressure to material 4 fed into die 1 is adjusted so as to be fixed film thickness. In said method, pressure P is adjusted so as to satisfy the formula in corresponding to variation of speed V with a proviso that radius of the nozzle 2 as R2, length of the nozzle as l1, viscosity of the material 4 as eta and drawing speed of fiber 3 as V.

5. 发明专利

JPH01120510A PRODUCTION OF OPTICAL FIBER COUPLER 失效
公开(公告)号：JPH01120510A
公开(公告)日：1989-05-12
申请号：JP27817387
申请日：1987-11-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOKOHAMA ITARU , SENDA KAZUNORI , NODA JUICHI
IPC分类号： C03B37/10 , G02B6/28
摘要： PURPOSE:To obtain high productivity by simultaneously heating and stretching the part of a 1st optical fiber group where the protective coating thereof is removed and arranging the 2nd optical fiber group in parallel therewith, then simultaneously executing the welding and stretching treatment at one time. CONSTITUTION:The protective coating of tape-shaped multifiber optical fibers 22 is stripped in a prescribed section and the fibers are arranged in parallel on one plane. The exposed parts of the fibers are heated and stretched to form fibers 23a-23e. The fibers 21a-21e of the 2nd fiber group formed by treating the tape-shaped multifiber optical fibers 21 in the same manner are, in succession, arrayed and disposed on the plane parallel with the plane arranged with the 1st fiber group, at the same pitch in parallel with the fibers 23a-23e and are brought into nearly tight contact with each other. These fibers are then heated at one time and are welded to the respectively corresponding fibers in a part 30. The welded part is then heated and stretched. The stretching is stopped when the desired characteristics are obtd. in a part 31. Five pieces of optical fiber couplers are formed at this time in this embodiment. Plural pieces of the optical fiber couplers having the less dependency of a coupling rate on wavelength are formed at one time according to this constitution.

6. 发明专利

JPS6444407A APPARATUS FOR PRODUCING OPTICAL COUPLER 失效
公开(公告)号：JPS6444407A
公开(公告)日：1989-02-16
申请号：JP20161187
申请日：1987-08-12
申请人： JAPAN AVIATION ELECTRON , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIMAMURA MASATO , SASAKI HIROYUKI , MOTOHARA SHINJI , ASAMI EIICHI , NODA JUICHI , SENDA KAZUNORI , YOKOHAMA ITARU
IPC分类号： G02B6/28
摘要： PURPOSE:To maintain specified stretching conditions and to uniformize the characteristics of optical fibers by adopting the constitution consisting in measuring the moving amt. of a supporting base for the optical fibers to be heated, spliced and stretched and controlling the tension to be imparted to the optical fibers to the specified tension by a controller. CONSTITUTION:The intermediate point of the optical fibers 1A, 2A supported by freely movable supporting bases 3, 4 is heated and spliced by a heating device and is stretched. The supporting bases 3, 4 are moved outward by a magnet 23 by energizing winding cores 21 of driving means 16, 17 and the moving amt. thereof is measured by measuring means 3B, 4B and is inputted to the controller 10 which controls a current source 25 for energizing the cores 21. The controller 10, therefore, controls the traction power to stretch the optical fibers to gradually lower the traction force according to the moving amt. of the supporting bases 3, 4 and with lapse of time, thereby maintaining the specified tension per unit sectional area of the optical fibers. The stretching conditions are thus maintained constant and the characteristics of the optical fibers are uniformized.

7. 发明专利

JPS6444406A APPARATUS FOR PRODUCING OPTICAL FIBER COUPLER 失效
公开(公告)号：JPS6444406A
公开(公告)日：1989-02-16
申请号：JP20161087
申请日：1987-08-12
申请人： JAPAN AVIATION ELECTRON , NIPPON TELEGRAPH & TELEPHONE
发明人： MOTOHARA SHINJI , SASAKI HIROYUKI , NODA JUICHI , SENDA KAZUNORI , YOKOHAMA ITARU
IPC分类号： G02B6/28
摘要： PURPOSE:To control the moving amt. of optical fibers with simple construction and high accuracy by using a means for heating, splicing and stretching the fibers to each other, means for applying tension thereto and means for calculating the reference point of the fibers from the moving amt. of a moving base and controlling the position of a heating means. CONSTITUTION:The optical fibers 1A, 2A which are stretched after heating and splicing by the heating means 5 are supported by a stationary base 3 and a moving base 4. Tension is applied to the optical fibers by the tension applying means 12 and the value measured by a means 4B for measuring the moving amt. is inputted to a controller 10 which calculates the reference point of the optical fibers 1, 2. The position data on the reference point is applied to a pulse motor driving circuit 10F. The central value of the forward and backward moving range of a pulse motor 9 which moves the heating means 5 is detected and checked by an encoder 11. The moving amt. is, therefore, controlled with the simple construction and the high accuracy.

8. 发明专利

JPS63118705A OPTICAL FIBER COUPLER PRODUCING DEVICE 失效
公开(公告)号：JPS63118705A
公开(公告)日：1988-05-23
申请号：JP26404586
申请日：1986-11-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOKOHAMA ITARU , NODA JUICHI , SENDA KAZUNORI
IPC分类号： G02B6/28 , G02B6/287
摘要： PURPOSE:To reduce the bend and twist of a fused part at the time of fusing optical fibers by providing the titled device with plural moving boards fixing a part of plural optical fibers and capable of being moved in the longitudinal direction of the optical fibers and a driving mechanism for driving the moving boards so that tensile force applied to the plural optical fiber is uniformed. CONSTITUTION:One ends of optical fibers 1, 2 are respectively fixed on optical fiber fixing boards 7, 7a and the other ends are fixed on the moving boards 8, 8a. Air bearings are used for the moving boards 8, 8a and the moving boards 8, 8a can be floated and moved in the longitudinal direction of the optical fibers 1, 2 by air pressure. The moving boards 8, 8a are coupled with a weight 11 by a wire 9 and a fixed tensile force is applied to the moving boards 8, 8a by gravity applied to the weight 11, but the moving boards 8, 8a are rest on balanced positions by the optical fibers 1, 2 and almost uniform tensile force is applied to the optical fibers 1, 2. Even if the optical fibers 1, 2 are shifted from original fixed positions, the positions of the moving boards 8, 8a are changed in accordance with the shear by vertical position adjusters 5, 5a and horizontal position adjusters 6, 6a and the tensile force applied to the optical fibers 1, 2 is not changed.

9. 发明专利

JPS636504B2 失效
公开(公告)号：JPS636504B2
公开(公告)日：1988-02-10
申请号：JP8102080
申请日：1980-06-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SENDA KAZUNORI , KIMURA TAKAO , SAKAGUCHI SHIGEKI
IPC分类号： C03C25/10 , B05D1/18 , G02B6/44

10. 发明专利

JPS60161346A PROCESS AND DEVICE FOR PREPARING OPTICAL FIBER PREFORM 失效
公开(公告)号：JPS60161346A
公开(公告)日：1985-08-23
申请号：JP6984
申请日：1984-01-05
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： MIYANOCHI TETSUO , YOSHIDA MASANOBU , TSURITA TAMIO , KANAMORI HIROO , SENDA KAZUNORI
IPC分类号： G02B6/00 , C03B19/14 , C03B37/014 , C03B37/018
摘要： PURPOSE:To prepare an optical fiber preform having a specified distribution of glass raw material by sensing the variation of growth at the lowermost part of a deposited particulate glass body in the horizontal direction due to an oxyhydrogen flame burner and correcting the oxyhydrogen flame burner in the horizontal direction. CONSTITUTION:Gaseous glass raw material is flame-hydrolyzed in a muffle furnace 1 by ejecting the raw material from the oxyhydrogen flame burner 2 and deposited particulate glass 4 is grown on a tip end of a supporting rod 3 which rises up with revolution to prepare a bar-shaped optical fiber preform. In this process, when the lowermost part of the deposited glass body 4 is shifted in the horizontal direction during the growth of the deposited glass body 4, the amt. of shift is sensed by the sensors 12, 13 for sensing the position in the X-axis and Y-axis. Then, a pulse motor 14 is controlled based on the sensing signal through a control board 16, and automation stages 10, 11 for shifting in X- and Y-axis direction mounting the oxyhydrogen flame burner 2 are shifted in the horizontal direction. By this way, the relative position of the lowermost part of the deposited glass body 4 to the oxyhydrogen flame burner 2 is maintained constantly, and optical fiber preform having uniform distribution of refractive index is obtd. stably.

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