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111. 发明专利

JPS57150209A AUTOMATIC GAIN CONTROLLING CIRCUIT OF OPTICAL SIGNAL 失效
公开(公告)号：JPS57150209A
公开(公告)日：1982-09-17
申请号：JP3611081
申请日：1981-03-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI
IPC分类号： H04B10/572 , G02F1/01 , G02F1/03 , G02F1/05 , H03G3/20 , H03G3/30 , H04B10/00 , H04B10/07 , H04B10/293 , H04B10/54 , H04B10/564 , H04B10/66
摘要： PURPOSE:To prevent damage or saturation of a photodetecting element, and to expand the gain control range, by constituting so that a photodetecting level of the photodetecting element becomes constant by inserting an optical intensity modulator between an optical fiber and the photodetecting element. CONSTITUTION:An optical intensity modulator 10 is formed by an electrooptic crystal, etc., and is operated so that the higher the control voltage supplied from a high voltage DC amplifier 9 becomes, the lower the transmittivity of an output light beam of an optical fiber 1 to a photodiode 2 becomes. When an output of the optical fiber 1 increases, the output voltage of a peak detector 6 increases, the output voltage of a differential amplifier 7 and the high voltage DC amplifier 9 increases, the transmittivity of the optical intensity modulator 10 drops, the negative feedback is provided, and an optical input level to the photodiode 2 and output voltage to a terminal 5 are controlled to a constant value.

112. 发明专利

JPS5797691A BIAS CIRCUIT FOR LASER DIODE 失效
公开(公告)号：JPS5797691A
公开(公告)日：1982-06-17
申请号：JP17604480
申请日：1980-12-10
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI , ITOU KATSUYOSHI
IPC分类号： H01S5/068 , H01S5/0683
摘要： PURPOSE:To control the peak value of a light output pulse constantly even for the variation in the mark rate and duty ratio of a modulation signal by controlling the reference value of a bias controlling circuit of a laser diode in accordance with the average value of the modulation signal. CONSTITUTION:A bias current is supplied to a laser diode 1 formed of amplifier A having transistors 3, 10 grounded in AC manner at the input side, the light output of the diode 1 is partly fed back to a photodiode 2 provided at the input side of the amplifier A, and the photodetecting current is inputted to the amplifier A, thereby stabilizing the optical output of the diode 1 by providing a differential amplifier 12, a reference voltage supply terminal 13, a resistor 14, a capacitor 15, and a modulation signal (voltage signal) supply terminal 16. The modulation signal supplied to the terminal 16 by the resistor 14 and the capacitor 15 is averaged, and a DC voltage is outputted. This DC voltage and the reference voltage from the terminal 13 are supplied to the amplifier 12, which amplifies the difference between the voltages as the bias voltage of the diode 2.

113. 发明专利

JPS5710566A DECODING CIRCUIT 失效
公开(公告)号：JPS5710566A
公开(公告)日：1982-01-20
申请号：JP8480880
申请日：1980-06-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAWARABAYASHI SHIGEYUKI , KITAYAMA TADAYOSHI , SUGIYAMA YASUO
IPC分类号： H03M5/04 , H03M5/12 , H04L25/49
摘要： PURPOSE:To enable decoding for the data independently of sections at the first and latter half bits of the reception series data, by differentially decoding the decoding circuit of FM code. CONSTITUTION:When a timing clock pulse (b) is given to an FF505, the pulse C from the Q output terminal is introduced from an output terminal 504 externally. Further, the Q output signal of the FF505 and the original timing clock pulse (b) are given to an AND gate 509 to output the clock pulse (d) for the selection of the latter half bit. Further, this pulse (d) is given to an FF506 to select the latter half bit of the reception series data. The signal selected at the FF506 is given to an FF507 and a signal delayed by a period T is outputted Q. Further, the Q output of the FFs 506 and 507 is in EXOR at a gate 508 and inverted at an inverter 511 for decoding.

114. 发明专利

JPS5666082A BIAS CIRCUIT FOR LASER DIODE 失效
公开(公告)号：JPS5666082A
公开(公告)日：1981-06-04
申请号：JP14256879
申请日：1979-11-02
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI
IPC分类号： H01S5/068 , H01S5/0683
摘要： PURPOSE:To sufficiently increase the biase voltage to be applied to a photodiode when a bias circuit is composed of a laser diode, a photo diode and a transistor by a method wherein a constant-voltage diode is inserted in a photo diode DC circuit. CONSTITUTION:When a part of luminuous output of a laser diode 1 is guided to a photo diode 2 through a medium of a photo wave-guide passage 11, the current flowing from a DC power source 11 to a series circuit of a resistor 8 and a diode 2 is determined in relation to the luminous output of the diode 1. In this constitution, the luminous output of the diode 1 is monitored using the output voltage of a monitor voltage wave-form output terminal 13 through a intermediary of a capacitor 9, the current flowing in the diode 2 is added to a curret amplfier consisting of transistors 3 and 4, and with this output the negative feed-back of the DC bias current of the diode 1 is controlled and the luminous output can be stabilized. As a result, the output is stabilized, but as the monitor voltage wave-form is distorted, a constant-voltage diode 16 is provided between the transistor 3 and 4 and the distorsion of the wave form is removed.

115. 发明专利

JPS5643792A BIAS CIRCUIT OF LASER DIODE 失效
公开(公告)号：JPS5643792A
公开(公告)日：1981-04-22
申请号：JP12058079
申请日：1979-09-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI , OOTA TAKAHISA
IPC分类号： H01S5/068 , H01S5/0683
摘要： PURPOSE:To enable a light emitting waveform to be monitored as voltage waveform without impairing stable action in the mean light emitting output of a laser diode by means of a resistance element inserted in series into a photo diode. CONSTITUTION:A light emitting output of a laser diode 1 is transmitted to a photo diode 2 by way of a light wave guide 9 and a light detecting current is outputted from the photo diode 2 according to the light detecting quantity. One end of a resistor 12 is grounded in an AC manner with a condenser 6 so as to enable monitoring through a condenser 13 from the other end of the resistor 12 whereby AC component of the light emitting output waveform from a laser diode 1 is drawn to a terminal 14 to monitor. In this case, since a monitor terminal 14 is separated from a light emitting output stabilizing circuit in a DC manner with a condenser 13, there is no impairing of stability in the light emitting output of the laser diode 1.

116. 发明专利

JPS5643788A BIAS CIRCUIT FOR LASER DIODE 失效
公开(公告)号：JPS5643788A
公开(公告)日：1981-04-22
申请号：JP11953279
申请日：1979-09-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI , OOTA TAKAHISA
IPC分类号： H01S5/068 , H01S5/0683
摘要： PURPOSE:To enable electrically monitoring of a light emitting output waveform without impairing stable action of mean light emitting output of a laser diode by providing a resistance element connected to a photodiode in series in such a manner that a DC bias path of an amplifier is formed. CONSTITUTION:Supplied with a bias current from a transistor 3, a laser diode emits light at a certain action level according to a modulation signal from an input terminal 8. The light emitting output of the laser diode 1 is transmitted to a photodiode 2 by way of a light wave guide 9, which provides a photodetecting current according to the light emitting output of the laser diode 1 to the base of a transistor 10. In this case, the base of the transistor 10 is grounded in an AC manner with a condenser 6 so that only DC component is inputted thereto as control signal. Connected in series to a photodiode 1, a resistance element 12 is provided to detect the photodetecting current whereby the light emitting output waveform is obtained from a monitor terminal 14 without impairing the stability of the light emitting output of the laser diode 1.

117. 发明专利

JP2000098270A OPTICAL SWITCH AND OPTICAL PATH CHANGEOVER DEVICE USING OPTICAL SWITCH 失效
公开(公告)号：JP2000098270A
公开(公告)日：2000-04-07
申请号：JP13255299
申请日：1999-05-13
申请人： MITSUBISHI ELECTRIC CORP
发明人： YOKOYAMA YOSHINORI , TAKEDA MUNEHISA , OTA HITOSHI , KAMIMURA ARITOMO , KITAYAMA TADAYOSHI
IPC分类号： G02B26/08 , B81B5/00 , G02B6/35
摘要： PROBLEM TO BE SOLVED: To enable the self-holding of an optical path changeover member by magnetic force even if electric power is not supplied by constituting an optical switch in such a manner that a permanent magnet and a mirror are movable between a first position and a second position by changing over the direction of the current flowing to the coil of an electromagnet. SOLUTION: A moving part 14 has the columnar permanent magnet 16 and the mirror 18 of a rectangular shape. The mirror 18 is positioned onto the boundary between the N pole and S pole of the permanent magnet 16 and is fixed to the permanent magnet 16. The moving part 14 is so constituted as to be rotatable between the first position where the permanent magnet 16 is housed in a supporting part 8 and the mirror 18 comes into contact with a positioning part 10 and the second position where the mirror comes into contact with a positioning part 12. The electromagnet 20 is arranged under the supporting part 4. The electromagnet 20 has the coil 22. The permanent magnet 16 and the mirror 18 may be moved between the first position and the second position by changing over the direction of the current flowing to the coil 22 of the electromagnet 20 of the optical switch.

118. 发明专利

JP2000078084A Optical signal quality monitoring device 有权
标题翻译：光信号质量监测装置
公开(公告)号：JP2000078084A
公开(公告)日：2000-03-14
申请号：JP24559498
申请日：1998-08-31
申请人： Kdd Corp , Mitsubishi Electric Corp , ケイディディ株式会社 , 三菱電機株式会社
发明人： MIZUOCHI TAKASHI , OZAKI YOJIRO , KAMIMURA ARITOMO , ICHIBAGASE HIROSHI , MATSUSHITA KIWAMU , KITAYAMA TADAYOSHI , YAMAMOTO SHU , MIYAZAKI TETSUYA , KABASHIMA TAKATOMI , KOBAYASHI NAOKI
IPC分类号： H04B10/07 , H04B10/077 , H04B10/079 , H04B10/524 , H04B10/556 , H04J3/14 , H04J14/00 , H04J14/02 , H04L1/20 , H04Q11/04 , H04B10/08 , H04B10/00
CPC分类号： H04L1/20 , H04B10/0775 , H04B2210/071 , H04B2210/072 , H04B2210/078 , H04J3/14 , H04J14/02 , H04J14/0227 , H04J14/0245 , H04J14/0249 , H04J14/0283 , H04J2203/0057
摘要： PROBLEM TO BE SOLVED: To easily monitor the quality of optical signals with high efficiency and high accuracy by receiving the signals transmitted via an optical transmission system, identifying and reproducing the monitoring signal light out of those received signals and detecting errors based on the above monitoring signal light.
SOLUTION: A clock extraction circuit 1 to an SOH termination circuit 7 detect the errors based on the identified and reproduced monitoring signal light and monitor the quality of transmission line of an optical communication system, i.e., the quality of a main signal STM-16. The monitoring signal light consisting of a signal STM-1 is received by a photodiode 102 having a band equivalent to the signal STM-16, a preamplifier 103 and a postamplifier 104, undergoes the band limitation via an equalizing filter 105 and is identified and reproduced by an identifier 107. The code error factor characteristic is equal to the signal STE-16 when the receiving electric band width does not vary although the monitoring signal light is equal or not equal to the signal STM-1. Thus, the component element of this monitoring device can use a simple and small circuit of small power consumption that is used for the signal STM-1.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：为了通过接收通过光传输系统传输的信号，以高效率和高精度容易地监视光信号的质量，从这些接收信号中识别和再现监视信号光，并基于上述监视来检测错误信号灯。解决方案：SOH终端电路7的时钟提取电路1基于所识别和再现的监控信号光检测错误，并监视光通信系统传输线的质量，即主信号STM-16的质量。由信号STM-1构成的监视信号光由具有等于信号STM-16的频带的光电二极管102，前置放大器103和后置放大器104经由均衡滤波器105经受频带限制，并被识别和再现当接收电波段宽度不变化时，代码误差因子特性等于信号STE-16，尽管监视信号光等于或不等于信号STM-1。因此，该监视装置的元件可以使用用于信号STM-1的小功耗的简单小电路。

119. 发明专利

JP2000078080A Optical switching device 有权
标题翻译：光开关器件
公开(公告)号：JP2000078080A
公开(公告)日：2000-03-14
申请号：JP24579598
申请日：1998-08-31
申请人： Kdd Corp , Mitsubishi Electric Corp , ケイディディ株式会社 , 三菱電機株式会社
发明人： KAMIMURA ARITOMO , ICHIBAGASE HIROSHI , MIZUOCHI TAKASHI , KITAYAMA TADAYOSHI , YAMAMOTO SHU , MIYAZAKI TETSUYA , KABASHIMA TAKATOMI , KOBAYASHI NAOKI
IPC分类号： H04B10/03 , H04B10/032 , H04B10/27 , H04B10/275 , H04B10/29 , H04Q11/00 , H04B10/02 , H04B10/20
CPC分类号： H04J14/0297 , H04J14/0283 , H04J14/0291 , H04J14/0294 , H04Q11/0005 , H04Q11/0062 , H04Q2011/0024 , H04Q2011/0043 , H04Q2011/0081 , H04Q2011/0092
摘要： PROBLEM TO BE SOLVED: To improve the use efficiency of a transmission line by outputting the optical signals which are inputted from WRKin and PRTin ports respectively while the paths the switched in terms of a space or in a direct communication state and outputting one of these two output signals to a Drop (WRK) port with the other turned on and off and outputted to a Drop (PRT) port respectively.
SOLUTION: Active terminal station devices 13 and 19 are connected to standby station devices 14 and 20 respectively, and opposite optical switching devices 18 and 26 connected to each other via an active transmitting path 25, an active receiving path 15, a standby transmitting path 16 and a standby receiving path 17. A receiving optical switching means 9 switches spatial paths for the optical signals inputted from a WRKin port 1 and a PRTin port 3 and outputs one of both output beams to a Drop (WRK) port 6. A standby receiving optical gate means 10 is placed between the other output beam of the means 9 and a Drop (PRT) port 8 and switches the light transmission and non- transmission states. Both means 9 and 10 are included in a receiving part 23.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：通过输出从WRKin和PRTin端口输入的光信号，同时在空间或直接通信状态下切换的路径和输出这两个端口之一来提高传输线的使用效率输出信号到一个Drop（WRK）端口，另一个接通和关闭，分别输出到一个Drop（PRT）端口。解决方案：有源终端设备13和19分别连接到备用站设备14和20，并且相互相连的光交换设备18和26经由主动发送路径25，主动接收路径15，备用发送路径16 和待机接收路径17.接收光切换装置9切换从WRKin端口1和PRTin端口3输入的光信号的空间路径，并将两个输出波束中的一个输出到丢弃（WRK）端口6.待机接收光栅装置10被放置在装置9的另一个输出光束和一个投影（PRT）端口8之间，并切换光传输和非传输状态。装置9和10都包括在接收部分23中。

120. 发明专利

JPH1127284A PREFERENTIAL MULTIPLEXER OF CELL 失效
公开(公告)号：JPH1127284A
公开(公告)日：1999-01-29
申请号：JP17942997
申请日：1997-07-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： MAKINO SHINYA , AKITA MASASHI , KITAYAMA TADAYOSHI
IPC分类号： H04Q3/00 , H04L12/28
摘要： PROBLEM TO BE SOLVED: To reduce delay due to multiplex for a cell in which no possibility of the cell discard and the delay in a slave device is allowed by preferentially controlling the multiplex for the slave device based on a signal from a residual amount monitor. SOLUTION: The number of residual cells in a buffer 102 is monitored by a residual amount monitoring circuit 116 and the number of the residual cells in the buffer is informed to a master device 11 in the slave device 12. A monitor circuit output signal 117 is received in the master device 11, one of the slave devices 12 to execute polling, for example, 12i is determined and a preferential control result 119 is transmitted to a polling control circuit 110 in a preferential control circuit 118. An individual polling signal 111i is outputted for line slave 12i corresponding to the control result 119 in the polling control circuit 110, the cell in a buffer 102i is read by a reading control circuit 105i, cell flow 106i is transmitted to the master device 11 and the cell flow is received by a cell reception circuit 112 in the slave device 12i.

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