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31. 发明专利

JPS5972245A Remote control system of optical digital repeater 失效
标题翻译：光数字复读机远程控制系统
公开(公告)号：JPS5972245A
公开(公告)日：1984-04-24
申请号：JP18133482
申请日：1982-10-18
申请人： Kokusai Denshin Denwa Co Ltd
发明人： WAKABAYASHI HIROHARU , NIINOU YASUHIKO , TOKIWA HIDEHARU
IPC分类号： H04B3/46 , H04B10/035 , H04B10/07 , H04B10/075 , H04B10/299 , H04B10/524 , H04B17/00
CPC分类号： H04B10/07
摘要： PURPOSE:To prevent malfunction due to erroneous recognition of both a transmit and a control signal by making the deviation of the mark rate of the transmit signal less than that of the control signal, and setting the detection threshold value of a repeater between voltage levels generated by the deviations of the mark rates of both signals. CONSTITUTION:The repeater control signal generator 11 of a terminal station 10 generates the control signal 15 consisting of a rough part 15a of a mean mark rate 1/4 and a fine part of a mean mark rate 3/4 and the signal is sent out to a transmission line 14 through a switch 13. A code converter 12 controls the mark rate of the transmit signal 16 inputted from a transmit signal input control terminal 18 to make the amount of mark rate deviation less than that of the control signal. Control signal detectors of optical repeaters 17 and 17' have threshold voltages set between voltage levels generated by the deviations of the mark rates of the control signal and code-converted transmit signal.
摘要翻译：目的：通过使发送信号的标记速率偏离小于控制信号的标记速率的偏差来防止由于发送和控制信号两者的错误识别而发生的故障，并且在生成的电压电平之间设置中继器的检测阈值通过两个信号的标记速率的偏差。构成：终端站10的中继器控制信号发生器11产生由平均标记速率1/4的粗糙部分15a和平均标记速率3/4的精细部分组成的信号发送出去的控制信号15 通过开关13传送到传输线14.代码转换器12控制从发送信号输入控制端子18输入的发送信号16的标记速率，以使标记速率偏差量小于控制信号的量。光中继器17和17'的控制信号检测器具有由控制信号和码转换的发射信号的标记速率的偏差产生的电压电平之间设置的阈值电压。

32. 发明专利

JPS5768938A Optical pulse and echo detector 失效
标题翻译： OPTICAL PULSE和ECHO检测器
公开(公告)号：JPS5768938A
公开(公告)日：1982-04-27
申请号：JP14360580
申请日：1980-10-16
申请人： Kokusai Denshin Denwa Co Ltd
发明人： TOKIWA HIDEHARU , NIINO YASUHIKO , WAKABAYASHI HIROHARU
IPC分类号： H04B10/00 , G01M11/00 , H04B10/077 , H04B10/2507
CPC分类号： H04B10/07 , H04B10/071
摘要： PURPOSE:To attenuate unnecessary reflection pulses from an optical branch means and to extend the detection distance, by making conductive an optical switch provided between an optical branch means and an optical detection means after a prescribed time after setting said switch to a cutoff state. CONSTITUTION:An optical pulse from an optical pulse generating source 2 enters an optical fiber 4 via the 1st port 11 and the 2nd port 12 of an optical branch means 1 with a triger signal from a trigger signal source 10. In this case, a part of the optical pulses goes to photodetector 6 via the 3rd port 13 with the reflection and leakage inside the optical branch means 1. A switching control signal source 15 keeps driving an optical switch 14 before a part of the optical pulses reaches the photodetector 6, and interrupts an optical path between the port 13 and the detector 6 for a prescribed time until the leakage of the optical pulses is finished to the detector. Thereafter, a signal source 15 is interrupted and the port 13 and the detector 16 are made conductive, then the optical pulses refelcted from a failure point 3 are detected at the detector 6 via a fiber 4, ports 12, 13 and the switch 14.
摘要翻译：目的：为了从光分支装置中衰减不必要的反射脉冲并延长检测距离，通过在将所述开关设置为截止状态之后的规定时间之后使光分路装置和光检测装置之间的光开关导通。构成：来自光脉冲发生源2的光脉冲经由光分路装置1的第一端口11和第二端口12通过来自触发信号源10的三角信号进入光纤4.在这种情况下，的光脉冲经由第三端口13经由光分支装置1内部的反射和泄漏进入光电检测器6.开关控制信号源15在光脉冲的一部分到达光电检测器6之前保持驱动光开关14，并且中断端口13和检测器6之间的光路达预定时间，直到光脉冲的泄漏完成为检测器。此后，中断信号源15，使端口13和检测器16导通，然后通过光纤4，端口12,13和开关14在检测器6处检测到从故障点3反馈的光脉冲。

33. 发明专利

JPS55125427A METHOD OF MEASURING BREAKING POSITION OF OPTICAL 失效
公开(公告)号：JPS55125427A
公开(公告)日：1980-09-27
申请号：JP3325479
申请日：1979-03-23
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： WAKABAYASHI HIROHARU , TOKIWA HIDEHARU
IPC分类号： G01M11/00
摘要： PURPOSE:To facilitate the discrimination of the positional relationship of reflected signals from reflection points by using a sine wave as a measuring signal and replacing the delay time in which a photosignal is transmitted within a photofiber for the sweep frequency width of a sweep oscillator corresponding to the delay time. CONSTITUTION:A laser 2 is driven by the output sweep ocillator 10 sweeping the frequency of f0-f1Hz at the sweep speed of fsHz/sec., and a photosignal generated is sent out to a photofiber 4 via a photo-branching circuit 3. The photosignal is reflected at a break point 5, and is supplied to a light receiving element 6 again through the photofiber 4, and the photo-branching circuit 3, thus being converted into an electric signal and introduced into a modulator 11. The output of the sweep oscillator 10 is also supplied to the modulator 11, and in the output there appears a sine wave signal having a frequency equal to the difference between the frequency of the above described feflection signal and that of the sweep oscillator 10. This sine wave signal is passed through a filter 12 and is supplied to a spectrum analyzer 14. When the time required by the photosignal for reaching the light receiving element 6 from the sweep oscillator 10 is represented by DELTAT, fs.DELTAT is read out on the surface of the CRT of the analyzer 14, whereby DELTAT, that is, the position of the break point 5, is obtained.

34. 发明专利

JPH0583494B2 失效
公开(公告)号：JPH0583494B2
公开(公告)日：1993-11-26
申请号：JP18476385
申请日：1985-08-22
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： MIMURA HIDENORI , NIIHORI OSAMU , NAKAI TETSUYA , TOKIWA HIDEHARU
IPC分类号： C03C13/04 , C03B5/00 , C03B8/00 , C03B37/012 , C03B37/014 , G02B6/00 , C03B20/00

35. 发明专利

JPH01192737A PRODUCTION OF PREFORM FOR FLUORIDE GLASS FIBER AND APPARATUS THEREFOR 失效
公开(公告)号：JPH01192737A
公开(公告)日：1989-08-02
申请号：JP1711088
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： C03B37/012
摘要： PURPOSE:To obtain the title preform without containing foreign materials, bubbles, crystallites and moisture, by filling a fluoride glass to be a core of an optical fiber into a cylindrical vessel made of carbon, melting and solidifying the glass under specific conditions and coating the outer periphery thereof with a resin for a clad. CONSTITUTION:An apparatus in which a crucible 4 having a bottom hole is placed on a vertical split type cylindrical vessel 1, made of carbon and having an air-cooling column 3 is heated with a high-frequency coil 5 at, e.g., 800-1000 deg.C, to remove moisture therefrom and then cooled. A fluoride glass for a raw material is subsequently filled in the crucible 4, reheated, melted into the cylindrical vessel 1 and further melted by heating. An inert gas (e.g., N2) which is a cooling gas is then introduced from an introduction port 6 into the aircooling column 3 to quench the glass to about the transition temperature thereof. The introduction of the cooling gas is subsequently stopped to anneal the glass to ambient temperature and provide a glass rod, which is then taken out of the cylindrical vessel 1. The outer periphery of the rod is ground and coated with a resin for a clad.

36. 发明专利

JPS63143508A PREFORM FOR FLUORIDE GLASS FIBER AND ITS PRODUCTION 失效
公开(公告)号：JPS63143508A
公开(公告)日：1988-06-15
申请号：JP29021486
申请日：1986-12-05
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： MIMURA HIDENORI , NIIHORI OSAMU , TOKIWA HIDEHARU , NODA YUKIO , NAKAI TETSUYA , NORIMATSU NAOKI
IPC分类号： G02B6/00 , C03B37/012 , C03B37/018 , C03C3/32 , C03C13/04
摘要： PURPOSE:To suppress degradation of mechanical strength and generation of a scattering loss by infiltration of moisture into a glass rod contg. 15-25% NaF by coating said glass rod with Ge-Se glass contg. 10-20% Ge and removing the moisture on the rod surface by the plasma in a vacuum vessel. CONSTITUTION:A core part and clad part are constituted of the glass having the compsn. contg. ZrF4, BaF2, NaF, LaF3, and AlF3 and 15-25mol% NaF. Since this glass is drawn at 315-340 deg.C, the coating material is constituted of the Ge-Se glass contg. 10-20mol% Ge is order to maintain the viscosity of the coating material for the glass at 10 -10 Poise. Gaseous halogen 30 introduced into the vacuum vessel 25 is subjected to high-frequency heating 29 and the moisture sticking to the glass rod 26 surface is removed by the generated radicals so that the Ge-Se glass evaporated in a crucible 32 is uniformly deposited by evaporation on the rod 26 surface. The infiltration of the moisture to the glass rod is, therefore, completely prevented, by which the scattering loss at the time of drawing and the degradation in the mechanical strength and absorption loss of the fiber are suppressed.

37. 发明专利

JPS6150286B2 失效
公开(公告)号：JPS6150286B2
公开(公告)日：1986-11-04
申请号：JP10082680
申请日：1980-07-23
申请人： KOKUSAI DENSHIN DENWA CO LTD
发明人： EJIRI YOSHIHIRO , NAKAI TAIICHIRO , NIINO YASUHIKO , NUNOKAWA MAKOTO , YAMAMOTO HITOSHI , TOKIWA HIDEHARU
IPC分类号： H01B7/14 , G02B6/44

38. 发明专利

JPS6163544A Fluoride glass optical fiber 失效
标题翻译：氟玻璃光纤
公开(公告)号：JPS6163544A
公开(公告)日：1986-04-01
申请号：JP18375484
申请日：1984-09-04
申请人： Kokusai Denshin Denwa Co Ltd
发明人： MIMURA HIDENORI , TOKIWA HIDEHARU , NIIHORI OSAMU , NAKAI TETSUYA
IPC分类号： C03C13/04 , G02B6/00 , G02B6/02
CPC分类号： C03C13/042 , Y10T428/2929
摘要： PURPOSE:To provide a fluoride glass optical fiber free from the increase of the scattering loss caused by the deposition of fine crystals in spinning, by adding specific amount of NaF and HfF4 to adjust the viscosities and linear expansion coefficients of the core and the clad. CONSTITUTION:The core and the clad of the objective fiber is made of a compo sition composed mainly of ZrF4-BaF2-LaF3-AlF3. A desired specific refractive index difference between the core and the clad is achieved by adding controlled amount of NaF and HfF4 to the core and the clad. The amounts of NaF and HfF4 are selected to satisfy the formula 0
摘要翻译：目的：为了提供氟化物玻璃光纤，不需要通过添加特定量的NaF和HfF4来调节纤芯和包层的粘度和线膨胀系数，从而增加纺丝中微细晶体沉积引起的散射损耗。构成：目标纤维的芯和包层由主要由ZrF4-BaF2-LaF3-AlF3组成的组成。通过将受控量的NaF和HfF 4添加到芯和包层中来实现芯和包层之间的期望的比折射率差。选择NaF和HfF4的量以满足公式0 <= 0.25DELTAHfF4-4DELTANaF <= 5其中DELTANaF是添加到芯中的NaF的量（mol％）与添加到包层中的量之差，并且DELTAHfF4是添加到芯中的HfF 4的量与添加到包层中的HfF 4的量之间的差异。通过氟化物玻璃的纺丝获得的光纤具有低的散射损失和传输损耗。

39. 发明专利

JPS6163538A Purification of fluoride glass 失效
标题翻译：氟化物玻璃的净化
公开(公告)号：JPS6163538A
公开(公告)日：1986-04-01
申请号：JP18375284
申请日：1984-09-04
申请人： Kokusai Denshin Denwa Co Ltd
发明人： NAKAI TETSUYA , MIMURA HIDENORI , NIIHORI OSAMU , TOKIWA HIDEHARU
IPC分类号： C03C1/02 , C01G1/06 , C01G27/04 , C03C3/32 , C03C13/04
CPC分类号： C01G27/04 , C01G1/06 , C03C3/325 , Y10S65/16
摘要： PURPOSE: To enable the dehydration and deoxidization of a fluoride glass at a relatively low temperature, by heating and melting a fluoride glass in NF
3 atmosphere.
CONSTITUTION: Ar gas is introduced through the gas inlet 2 into the reaction vessel 1 to substitute the atmosphere in the vessel1 with dry Ar gas. The high- frequency coil 3 is energized to effect the direct heating of the gold crucible 4 and the melting of the fluoride glass 5 at 500W800°C. After melting, the temperature of the crucible 4 is lowered a little, and the molten glass is cooled under the flow of Ar gas containing about 10% NF
3 to obtain a glass block. High dehydration effect and excellent deoxidization effect can be achieved by this process, without causing the contamination with decomposition product. Accordingly, the transmission loss of an optical fiber caused by the fluoride glass can be minimized. The purification method can be applied especially to ZrF
4 .HfF
4 -based fluoride glass.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过在NF3气氛中加热和熔化氟化物玻璃，使氟化物玻璃在较低温度下脱水脱氧。构成：将Ar气体通过气体入口2引入到反应容器1中，以干燥Ar气替代容器1中的气氛。高频线圈3被通电以实现金坩埚4的直接加热和氟化玻璃5在500-800℃的熔化。熔化后，将坩埚4的温度降低一点，在含有约10％NF 3的Ar气体流下使熔融玻璃冷却，得到玻璃块。通过该方法可以实现高脱水效果和优异的脱氧效果，而不会引起分解产物的污染。因此，可以使由氟化物玻璃引起的光纤的传输损耗最小化。净化方法特别适用于ZrF4.HfF4基氟化物玻璃。

40. 发明专利

JPS59153141A Monitoring system for photo repeater 失效
标题翻译：照相机监控系统
公开(公告)号：JPS59153141A
公开(公告)日：1984-09-01
申请号：JP2633883
申请日：1983-02-21
申请人： Kokusai Denshin Denwa Co Ltd
发明人： WAKABAYASHI HIROHARU , NIINOU YASUHIKO , TOKIWA HIDEHARU
IPC分类号： G01M11/00 , G01R31/00
摘要： PURPOSE: To make it possible to monitor the input power to a photo repeater device and the operating state of LDs in a terminal station simultaneously, by adopting a mark-rate modulating device.
CONSTITUTION: When a monitoring signal is outputted, a monitoring-signal identifying circuit 25 controls a photo switch 21. A signal, which is sent out to an upward bound transmission path 12, is coupled to a downward bound transmission path 13 by way of a loop back circuit 26, and a monitoring loop for returning the signal to a terminal station is formed. At the same time, a "1" is outputted to an AND circuit 23. Input power and an oscillating frequency in a DC-DC converter 22 have a constant relationship, which can be obtained in advance. Therefore, the transmitting frequency in the DC-DC converter 22 is adopted as the data for the magnitude of the input power to a repeater device. Meanwhile, which of an active LD19 or a back-up LD is in operation can be determined by monitoring the logic level of a control lines connecting a control circuit 24 and the active LD and the back-up LD20.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过采用标记速率调制装置，可以同时监视终端的照相中继器的输入电源和LD的工作状态。构成：当监视信号被输出时，监视信号识别电路25控制光电开关21.发送到上行传输路径12的信号经由下行传输路径13 环回电路26，并且形成用于将信号返回到终端站的监视回路。同时，将“1”输出到“与”电路23.在DC-DC转换器22中的输入功率和振荡频率具有一定的关系，这可以预先获得。因此，采用DC-DC转换器22的发送频率作为对中继装置的输入电力的大小的数据。同时，可以通过监视连接控制电路24和有源LD和备用LD20的控制线的逻辑电平来确定活动LD19或备用LD中的哪一个正在运行。

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