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11. 发明专利

JPS59153142A Monitor system of underwater photo repeater 失效
标题翻译：水下照相机监控系统
公开(公告)号：JPS59153142A
公开(公告)日：1984-09-01
申请号：JP2633983
申请日：1983-02-21
申请人： Kokusai Denshin Denwa Co Ltd
发明人： WAKABAYASHI HIROHARU , TOKIWA HIDEHARU
IPC分类号： G01M11/00 , G01R31/00 , H04B10/035 , H04B10/07 , H04B10/073 , H04B10/077 , H04B10/29
摘要： PURPOSE: To make it possible to measure the photo input power and output power of a photo repeater at a remote terminal station, by such simple constitution that the output lights of upward bound and downward bound repeaters are respectively inputted to the up and down repeaters through a photo feedback circuit and the input power informations thereof are transmitted to the terminal station.
CONSTITUTION: In measuring photo input power, an optical switch 8 connects a laser diode 7 and an optical fiber 9 by the remote control signal transmitted from a terminal station through an optical fiber 11. In this state, a modulation circuit 6 is turned ON by the remote control signal from the terminal station and the input light inputted from the optical fiber 11 is converted to an electric signal by an avalanche photodiode 1 while said electric signal is modulated in the modulation circuit 6 by the code converted bias voltage of the avalanche photodiode 1. The modulated electric signal is received at a terminal station through optical fibers 9, 10' while converted to a laser signal by a laser diode 7. In measuring photo output power, the modulation circuit 6 is turned OFF and a modulation circuit 6' is turned ON.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了能够通过简单的结构测量远程终端站的照相中继器的照片输入功率和输出功率，可以将向上和向下的中继器的输出光分别输入到上下中继器通过光电反馈电路及其输入功率信息被发送到终端站。规定：在测量光电输入功率时，光开关8通过通过光纤11从终端发送的遥控信号连接激光二极管7和光纤9.在这种状态下，调制电路6由来自终端站的遥控信号和从光纤11输入的输入光被雪崩光电二极管1转换成电信号，同时所述电信号通过雪崩光电二极管的码转换偏压在调制电路6中被调制调制电信号在终端通过光纤9,10'接收，同时由激光二极管7转换为激光信号。在测量光输出功率时，调制电路6断开，调制电路6' 被打开。

12. 发明专利

JPS57185410A OPTICAL COUPLER 失效
公开(公告)号：JPS57185410A
公开(公告)日：1982-11-15
申请号：JP6941981
申请日：1981-05-11
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： MOCHIZUKI KIYOBUMI , WAKABAYASHI HIROHARU , NAMIHIRA YOSHITAKA , TOKIWA HIDEHARU
IPC分类号： G02B6/293 , G02B6/34 , G02B27/28
摘要： PURPOSE:To perform the connection or separation of the input beams with a low loss, by using an optical fiber for preservation of polarizee wave surface and a polarized beam splitter that is connected to the above-metnioned optical fiber. CONSTITUTION:An optical coupler includes a polarized beam splitter 7, optical fibers 8 and 9 for preservation of polarized wave surface, and a main optical fiber 6. The fibers 8 and 9 are connected to the splitter 7. In other words, an input light wave 10 containing a P polarized light wave 11 and an S polarized light wave which are linear polarized light waves orthogonal to each other is supplied to the splitter 7. Thus the wave 10 is separated to a P polarized light wave 10 and an S polarized light wave 11. On the other hand, the P and S polarized light waves 11 and 12 can be synthesized with a low loss when the splitter 7 is used in a different direction as shown in another diagram. Thus the beams can be separated or synthesized with a low loss.

13. 发明专利

JPS5614739A LIGHT PULSE ECHO DETECTOR 失效
公开(公告)号：JPS5614739A
公开(公告)日：1981-02-13
申请号：JP8934379
申请日：1979-07-16
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： TOKIWA HIDEHARU , WAKABAYASHI HIROHARU
IPC分类号： H04B10/07 , G01M11/00 , H04B10/00 , H04B10/071 , H04B10/077
摘要： PURPOSE:To eliminate unneeded reflected pulses from a light branch method as well as a loss of insertion by use of a light branch unit in which the 1st and 2nd ports conduct in the 1st state and the 2nd and 3rd ports conduct in the 2nd state. CONSTITUTION:A light pulse sent out of light emission source 2 enters light branch unit 11 by way of the 1st port 10 and, after being deflected by electric or acousto- optical element 15, enters optical fiber 4 connected to the 2nd port 12. At this time, deflection signal supply source 13, only until the light pulse sent out of light emission source 2 passes through light branch unit 11, supplies a deflection signal to acousto-optical element 15 and then turns off. Part of the light pulse sent to optical fiber 4 is reflected at fault point 3 and then enters light branch unit 11 from the 2nd port 12 by way of optical fiber 4 again and it advances straight in light branch unit 1 and reaches photodetector 6 by way of the 3rd port 14.

14. 发明专利

JPS5559401A LIGHT ISOLATOR 失效
公开(公告)号：JPS5559401A
公开(公告)日：1980-05-02
申请号：JP13170778
申请日：1978-10-27
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： TOKIWA HIDEHARU , NIINO YASUHIKO
IPC分类号： G02B6/00 , G02B6/26 , G02B6/32 , G02B6/42
摘要： PURPOSE:To eliminate power consumption and reduce size by providing a light focusing element having single directivity which focuses the light from the first optical transmission path but does not focus the light from the second optical transmission path. CONSTITUTION:If the length of a cylindrical optical lens 3 is selected slightly longer than (2n-1)/4 times the intrinsic zigzag period, the light signal from the first optical fiber 1 propagates without any loss into the second optical fiber 2 like the beam locus shown by 4. Cinversely, the light signal from the second optical fiber 2 is radiated in fan-form in the beam locus shown in 5, and therefore only part of this light signal is propagated into the first optical fiber by a light focusing element 3. This turns out that the element has single directivity, thus there is no power consumption at all. In addition, there is no need for any generating mechanism for electric fields and magnetic fields and therefore the size may be reduced.

15. 发明专利

JPH0476083B2 失效
公开(公告)号：JPH0476083B2
公开(公告)日：1992-12-02
申请号：JP20242785
申请日：1985-09-12
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： NIIHORI OSAMU , MIMURA HIDENORI , TOKIWA HIDEHARU , NAKAI TETSUYA
IPC分类号： G02B6/24 , G02B6/255

16. 发明专利

JPH01192736A PRODUCTION OF PREFORM FOR FLUORIDE GLASS FIBER AND APPARATUS THEREFOR 失效
公开(公告)号：JPH01192736A
公开(公告)日：1989-08-02
申请号：JP1710988
申请日：1988-01-29
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： MIMURA HIDENORI , NODA YUKIO , NORIMATSU NAOKI , TOKIWA HIDEHARU , NIIHORI OSAMU
IPC分类号： C03B5/02 , C03B5/225 , C03B37/012
摘要： PURPOSE:To obtain the title homogeneous preform without containing scattering factors, such as foreign materials or bubbles, by cooling a glass melt for a clad in a cylindrical vessel by a specific means, solidifying the outer peripheral part, discharging the melt in the central part thereof, introducing a glass melt for a core, cooling and solidifying the melts. CONSTITUTION:A cooling cylinder 12 and a melt reservoir part 14 are provided in a cylindrical vessel 1 having openings at both ends and a crucible 3 having openings at both ends is then placed in the cylindrical vessel 1 to close openings 5 and 8 of the lower ends of the cylindrical vessel 1 and crucible 3. Glass 2 for a clad is subsequently filled in the cylindrical vessel 1 and glass 4 for a core is filled in the crucible 3 to melt both glasses by a heating means 9. The crucible 3 is then inserted into the melt accompanying melting of the glass 2 for the clad and fixed at a prescribed position. A cooling gas is subsequently introduced from a gas introduction port 11 into the cooling cylinder 12 to solidify the outer periphery of the melt of the glass 2 for the clad to a prescribed thickness. A plug 8 for the crucible and a plug 7 for the cylindrical vessel are pulled out to discharge the melt in the central part of the glass 2 for the clad into the melt reservoir part 14 and the glass melt 4 for the core is simultaneously introduced into the central part of the glass for the clad and further cool and solidify the whole glass.

17. 发明专利

JPS63143512A SINGLE MODE FLUORIDE GLASS FIBER 失效
公开(公告)号：JPS63143512A
公开(公告)日：1988-06-15
申请号：JP29021386
申请日：1986-12-05
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： NIIHORI OSAMU , TOKIWA HIDEHARU , MIMURA HIDENORI
IPC分类号： G02B6/00 , C03C13/04 , G02B6/02
摘要： PURPOSE:To reduce a microbend loss so that the loss is extremely decreased by limiting the ranges of the outside diameter of a clad, the difference in the specific refractive index between the core and clad and the range of the radius of the core. CONSTITUTION:The outside diameter D(mum) of the desired clad, the difference DELTA(%) in the specific refractive index between the core and clad and the radius (a)(mum) of the core are so selected as to simultaneously satisfy the three equations; the equation I, the equation II and the equation III. The fluoride glass fiber which consists essentially of zirconium fluoride of the extremely low loss and with which the microbend loss is

18. 发明专利

JPS6217024A PREPARATION OF FLUORIDE GLASS 失效
公开(公告)号：JPS6217024A
公开(公告)日：1987-01-26
申请号：JP15523185
申请日：1985-07-16
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： NIIHORI OSAMU , MIMURA HIDENORI , TOKIWA HIDEHARU , NAKAI TETSUYA
IPC分类号： C03B8/00 , C03B5/06 , C03C3/32 , C03C13/04
摘要： PURPOSE:To decrease consumption of N3 gas in the stage of prepg. fluoride glass in gaseous NF3 atmosphere by allowing NF3 to react with the melt of fluoride glass by introducing gasous NF3 only into the melt of the fluoride glass and feeding insert gas only to a reaction vessel. CONSTITUTION:A crucible 4 packed with raw materials 5a for fluoride glass is placed in a reaction vessel 1, and the inside of the reaction vessel 1 is filled with Ar atmosphere by introducing gaseous Ar as inert gas from an introducing port 2 of the inert gas. The raw materials 5a are melted by heating with a high frequency coil 7, then gaseous mixture consisting of NF3 and Ar introduced from an introducing port 3, and a foot end of a carbon pipe 9 is inserted immediately into the melt 5 of the fluoride glass with a sliding rod 13. Dehydration and deionization are caused in the melt, and reaction products expelled out of the melt are discharged by the gaseous Ar from the reaction vessel 1. After completing the reactions, the pipe 9 is pulled off, and feed of the gaseous mixture consisting of NF3 and Ar is stopped, and the melt 5 is cooled.

19. 发明专利

JPS59205836A Optical repeater 失效
标题翻译：光学重复器
公开(公告)号：JPS59205836A
公开(公告)日：1984-11-21
申请号：JP8134483
申请日：1983-05-10
申请人： Fujitsu Ltd , Kokusai Denshin Denwa Co Ltd
发明人： FUJIWARA HARUO , TAKAHASHI MASAAKI , MOTEGI MITSUHIRO , WAKABAYASHI HIROHARU , NIINOU YASUHIKO , TOKIWA HIDEHARU
IPC分类号： H04B10/07 , H04B10/032 , H04B10/035 , H04B10/073 , H04B10/077 , H04B10/079 , H04B10/29 , H04B10/524 , H04B17/40
CPC分类号： H04B10/50
摘要： PURPOSE:To inform whether an activated laser is a spare laser or an active laser to a terminal station with off-line by using a line used for the communication at present to add a simple circuit. CONSTITUTION:An optical input is converted into an electric signal at a photodetecting circuit 1, passes through an OR circuit 23, changed to an optical signal at an LD driving circuit 3 and an LDN5 and is outputted through an optical switch 8. If the LDN is failed, an LD changeover circuit 7 switches the LD driving circuit 4 to a circuit 4, the electric signal is changed to the optical signal by an LD driving circuit 4 and an LDE6 through an OR circuit 24 and is outputted through the optical switch 8. When the terminal station desires to know which of the LDN5 or the LDE6 is activated, a supervising signal conducting loopback again from the terminal station after a loopback path is formed is transmitted. The terminal station discriminates the operation of the LDN5 or the LDE6 by detecting with what mark rate the signal looped back is modulated.
摘要翻译：目的：通过使用用于通信的线路，通过离线通知激活的激光器是否为备用激光器或主动激光器，以增加简单的电路。构成：光输入在光电检测电路1被转换为电信号，通过OR电路23，变为LD驱动电路3和LDN5的光信号，通过光开关8输出。如果LDN LD转换电路7将LD驱动电路4切换到电路4，由LD驱动电路4和LDE6通过OR电路24将电信号变换为光信号，并通过光开关8输出当终端想要知道哪个LDN5或LDE6被激活时，在形成环回路径之后再次从终端进行环回监控信号。终端通过以什么标记速率检测回信号被调制来识别LDN5或LDE6的操作。

20. 发明专利

JPS5842009A COLLECTED FIBER BUNDLE 失效
公开(公告)号：JPS5842009A
公开(公告)日：1983-03-11
申请号：JP13983681
申请日：1981-09-07
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： TOKIWA HIDEHARU , WAKABAYASHI HIROHARU
IPC分类号： G02B6/32 , G02B6/42
摘要： PURPOSE:To make the device miniaturized and high-reliability, by working the end part of an optical fiber bundle into a shape like a hemispheric lens to make the adjustment of the optical position of a lens unnecessary. CONSTITUTION:The end face of an optical fiber bundle where plural glass fibers 2 are bundled densely is made uniform and is heated with arc discharge, CO2 laser, or the like and is worked into a shape like a hemispherical lens. Since a core part 2a is hemispherical, the exit light from the core 2a has a wider divergence angle according as the exit position is more distant from the center toward both end, and the exit light is diverged toward the center. Consequently, the adjustment of the optical position of an external lens is unnecessary, and the device is made miniaturized and high-reliability.

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