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1. 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。

2. 发明专利

JP2005222083A Optical pulse generating apparatus and method for generating optical pulse 审中-公开
标题翻译：光学脉冲发生装置和产生光学脉冲的方法
公开(公告)号：JP2005222083A
公开(公告)日：2005-08-18
申请号：JP2005116374
申请日：2005-04-14
申请人： Kddi Corp , Kddi株式会社 , Mitsubishi Electric Corp , 三菱電機株式会社
发明人： SHIMIZU KATSUHIRO , MIZUOCHI TAKASHI , KOMIYA TAKESHI , MATSUSHITA KIWAMU , KITAYAMA TADAYOSHI , SUZUKI MASATOSHI , TAGA HIDENORI , YAMAMOTO SHU , EDAKAWA NOBORU , MORITA ITSURO
IPC分类号： G02F1/017 , G02F1/015
摘要： PROBLEM TO BE SOLVED: To obtain an optical pulse position detection circuit which detects the pulse position without using a complicated operational circuit. SOLUTION: The pulse generator includes: a light source 26 to output an optical signal; an oscillator 5 to output an electric clock signal; a first optical modulator 3a to modulate the intensity of the optical signal by the electric clock signal; a phase shifter 4 to shift the phase of the electric clock signal; a second optical modulator 3b to modulate the intensity of the optical signal from the first optical modulator by the phase-shifted electric clock signal; an optical demultiplexer 2 to demultiplex the output of the second optical modulator; an photodetector 8 to convert the demultiplexed optical signal into an electric signal; a dither signal generating circuit 11 to output a dither signal; a phase comparator 12 to synchronously detect the output of the photodetector and the dither signal; and a phase shifter controlling circuit 9 to control the phase shift degree of the phase shifter. The phase shifter control circuit receives the dither signal and the output of the phase comparator and controls the phase shifter to maximize the output of the photodetector. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：获得在不使用复杂的操作电路的情况下检测脉冲位置的光脉冲位置检测电路。
解决方案：脉冲发生器包括：光源26，用于输出光信号; 振荡器5，输出电时钟信号; 第一光调制器3a，用于通过电时钟信号调制光信号的强度; 移相器4，用于移位电时钟信号的相位; 第二光调制器3b，用于通过相移电时钟信号来调制来自第一光调制器的光信号的强度; 光解复用器2，用于对第二光调制器的输出进行解复用; 用于将解复用的光信号转换为电信号的光电检测器8; 抖动信号发生电路11输出抖动信号; 相位比较器12，用于同步检测光检测器的输出和抖动信号; 以及用于控制移相器的相移程度的移相器控制电路9。移相器控制电路接收抖动信号和相位比较器的输出，并控制移相器以使光电检测器的输出最大化。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2004180343A Optical transmitter 有权
公开(公告)号：JP2004180343A
公开(公告)日：2004-06-24
申请号：JP2004029643
申请日：2004-02-05
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： SHIMIZU KATSUHIRO , KITAYAMA TADAYOSHI , MIZUOCHI TAKASHI , MATSUSHITA KIWAMU
IPC分类号： H04B10/61 , H04B10/2507 , H04B10/516 , H04B10/524 , H04B10/532 , H04B10/54 , H04B10/556 , H04B10/588 , H04B10/04 , H04B10/00 , H04B10/02 , H04B10/06 , H04B10/142 , H04B10/152 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To provide an optical transmitter which can prevent residual light from being optically phase-modulated to cause a code error when an extinction ratio of intensity modulation is finite and is small in power consumption. SOLUTION: A light source 1 for generating an optical signal, a light intensity modulator 2 for modulating the light intensity of the optical signal based upon a light intensity modulator driving signal and an optical phase modulator 11 for optically phase-modulating the light intensity modulated optical signal based upon an optical phase modulator driving signal synchronized with the light intensity modulator driving signal are cascade connected, and the optical phase modulator driving signal to the optical phase modulator 11 is supplied via a switch 13 that is turned on/off via a switch control signal synchronized with the light intensity modulator driving signal. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2000286755A OPTICAL AMPLIFIER 失效
公开(公告)号：JP2000286755A
公开(公告)日：2000-10-13
申请号：JP9280699
申请日：1999-03-31
申请人： MITSUBISHI ELECTRIC CORP , KDD CORP , KDD KAITEI CABLE SYSTEM KK
发明人： KAMIMURA ARITOMO , MATSUSHITA KIWAMU , HORIUCHI YUKIO , SUZUKI MASATOSHI , EDAKAWA NOBORU , YAMAMOTO SHU , AKIBA SHIGEYUKI
IPC分类号： H03F3/08 , H04B3/36 , H04B10/03 , H04B10/079 , H04B10/29 , H04B10/293 , H04B10/80 , H04B10/02 , H04B10/16 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To obtain an optical amplifier that sets an output level of an optical relay circuit depending on a feeding current supplied to an optical amplifier. SOLUTION: A current detection means 26 detects a feeding current supplied to a feeder 2a and generates a setting signal to bypass circuits 22, 23 in response to the detected feeding current, the bypass circuits 22, 23 control an output level of optical relay circuits 11, 12 in response to the setting signal, that is, in response to the feeding current.

5. 发明专利

JPH10336154A LIGHT PULSE POSITION DETECTOR CIRCUIT, LIGHT PULSE GENERATOR AND THEIR METHODS 失效
公开(公告)号：JPH10336154A
公开(公告)日：1998-12-18
申请号：JP21421597
申请日：1997-08-08
申请人： MITSUBISHI ELECTRIC CORP , KOKUSAI DENSHIN DENWA CO LTD
发明人： SHIMIZU KATSUHIRO , MIZUOCHI TAKASHI , KOMIYA TAKESHI , MATSUSHITA KIWAMU , KITAYAMA TADAYOSHI , SUZUKI MASATOSHI , TAGA HIDENORI , YAMAMOTO SHU , EDAKAWA NOBORU , MORITA ITSURO
IPC分类号： G01J11/00 , G02F1/01 , G02F1/03 , H04J14/08
摘要： PROBLEM TO BE SOLVED: To output a light pulse having a short width. SOLUTION: This circuit is provided with a light source 26 which outputs an optical signal, an oscillator 5 that outputs an electric clock signal, a 1st optical modulator 3a which performs intensity modulation of the optical signal with an electric clock signal, a phase shifter 4 that shifts the phase of an electric clock signal, a 2nd optical modulator 3b which performs intensity modulation of an optical signal from the 1st optical modulator with the electric clock signal that undergoes phase shifting, an optical demultiplexer 2 which branches an output of the modulator 3b, a photodetector 8 which converts a demultiplexed optical signal into an electric signal, a dither signal generator circuit 11 that outputs a dither signal, a phase comparator 12 that performs synchronous detection of an output of the photodetector and the dither signal, and a phase shifter control circuit 9 which controls a phase shift amount of the phase shifter. The phase shifter control circuit receives a dither signal and an output of the phase comparator as input signals and controls the phase shifter so as to maximize the output of the photodetector.

6. 发明专利

JPH05136495A FIBERTYPE OPTICAL AMPLIFIER 失效
公开(公告)号：JPH05136495A
公开(公告)日：1993-06-01
申请号：JP29286591
申请日：1991-11-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： SHIMIZU KATSUHIRO , MIZUOCHI TAKASHI , MATSUSHITA KIWAMU , KITAYAMA TADAYOSHI
IPC分类号： H01S3/07 , H01S3/06 , H01S3/0915 , H01S3/0933 , H01S3/10
摘要： PURPOSE:To stabilize the excitation light levels of a fiber type optical amplifier having redundant structure by which excitation lights outputted by two excitation light sources having two amplifying mediums and two excitation light sources are synthesized, and then divided into two and put into the two amplifying mediums. CONSTITUTION:Excitation light waves outputted by excitation light sources 2a and 2b are polarized by wave polarization controllers 12a and 12b, and they are put into a wave sypthesizer and divider 8 in a polarized state meeting at a right angle with each other. After the polarization and synthesis, they are distributed and put into rare-earth doped optical fibers 1a and 1b through wavelength multiple wave-synthesizers and dividers 3a and 5b. Consequently, it becomes possible to constitute a fiber type optical amplifier without level variations by the synthesis of the two excitation lights.

7. 发明专利

JPH02194742A INFORMATION TRANSMITTING SYSTEM FOR MOVING BODY 失效
公开(公告)号：JPH02194742A
公开(公告)日：1990-08-01
申请号：JP1375589
申请日：1989-01-23
申请人： MITSUBISHI ELECTRIC CORP
发明人： MATSUSHITA KIWAMU
IPC分类号： H04B10/572 , H04B10/07 , H04B10/11 , H04B10/112 , H04B10/293 , H04B10/564
摘要： PURPOSE:To prolong the service life of the light-emitting element of a light transmitter being one communication equipment and to prevent a light-receiving unit being the other communication equipment from being saturated even if a distance between the communication equipments is near by changing the optical outputs between the communication equipments in accordance with the relative position of a moving body with respect to the other object. CONSTITUTION:When the moving body 1 passes near position detectors 5a-5n, they respectively transmit detection signals to a position information generation circuit 6, for example. The position information generation circuit 6 operates position information of the moving body 1 with respect to the light transmitter 3 by the detection signals from the position detection circuits 5a-5n, and transmits them to an optical output control circuit 7. It transmits optical output control signals which change continuously or stepwise the optical outputs of the light transmitter 3 in accordance with the distance between the light transmitter 3 and the photodetector 4 installed on the moving body 1 to the light transmitter 3 by position information signals from the position information generation circuit 6. Thus, the service life of the light-emitting element used for the light transmitter 3 is prolonged and the photodetector 4 is prevented from being saturated even if the distance between the communication equipments is near.

8. 发明专利

JPH01225238A STAR-SHAPED OPTICAL TRANSMISSION SYSTEM 失效
公开(公告)号：JPH01225238A
公开(公告)日：1989-09-08
申请号：JP5113688
申请日：1988-03-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI , MATSUSHITA KIWAMU , MOTOJIMA KUNIAKI
IPC分类号： G02B6/28 , H04B10/27 , H04B10/272 , H04B10/29
摘要： PURPOSE:To obtain the compact star coupler at low cost required for obtaining the same number of branchings by operating the star coupler. CONSTITUTION:An optical transmitting device 10 executes the photo-electric conversion of a transmitting signal from an input side 11 and an optical signal is outputted to optical fibers 12. The optical signal to be outputted from the optical fiber 12 is propagated in an input optical fiber 15a, diffused in a mixer part 16 and equally distributed to output optical fibers 17a-17c. On the other hand, the optical signal to be outputted from the optical fiber 13 is propagated in the output optical fiber 17a in a direction, which is reverse of the optical signal to be outputted from the optical fiber 12, diffused in the mixer part 16 and after that, equally distributed to input optical fibers 15a-15c.

9. 发明专利

JPH01194528A OPTICAL TRANSMISSION SYSTEM OF STAR TYPE 失效
公开(公告)号：JPH01194528A
公开(公告)日：1989-08-04
申请号：JP1808388
申请日：1988-01-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： KITAYAMA TADAYOSHI , MATSUSHITA KIWAMU , MOTOJIMA KUNIAKI
IPC分类号： G02B6/28 , H04B10/2507 , H04B10/2581 , H04B10/27 , H04B10/272 , H04L12/44
摘要： PURPOSE:To attain signal transmission, for which the generation of a modal noise is suppressed by executing the stable coupling of a speckle pattern on the end face of a connecting part between an ascending optical fiber and a star coupler. CONSTITUTION:An interval between an input part optical fiber 5 of a star coupler 4 and a transmitting device 1 is connected by an ascending optical fiber 15 to use a single mode optical fiber. Accordingly, without generating the speckle pattern on the output end face of the acsenting optical fiber 15, since the core diameter of the single mode optical fiber, which is the ascending optical fiber 15, is smaller than that of a multimode optical fiber, the stable coupling of the speckle pattern can be executed on the end face of the connecting part between the ascending optical fiber 15 and star coupler 4. Thus, the generation of the modal noise is decreased.

10. 发明专利

JPS61112390A Bias monitor circuit of laser diode 失效
标题翻译：激光二极管偏光监测电路
公开(公告)号：JPS61112390A
公开(公告)日：1986-05-30
申请号：JP23458484
申请日：1984-11-07
申请人： Mitsubishi Electric Corp
发明人： HIDA YASUO , MATSUSHITA KIWAMU
IPC分类号： H01S5/068 , H01S5/0683
CPC分类号： H01S5/06808 , H01S5/0683
摘要： PURPOSE:To make it possible to monitor a bias current stably and highly accurately, by providing a circuit, which detects the fluctuation of the differential quantum efficiency of a laser diode and automatically corrects a reference voltage. CONSTITUTION:A bias current is converted into a voltage by a resistor 11. The output, which is amplified by a differential amplifier 13, i.e., the modulation component in the monitored bias voltage VM, is guided to a peak detector 19 through a coupling capacitor 18 and a converted into a DC voltage VP. The difference between said voltage and the third reference voltage VR3 from a third reference voltage terminal 22 is amplified by a differential amplifier 20. The output voltage V3 can be made to agree with an error voltage DELTAV by adjusting the amplification factor G3 of the differential amplifier 20. The first reference voltage VR1 and the output voltage V3 are added by an adder circuit 21, and its output, which is the second reference voltage VR2, is compared with the monitored bias voltage VM. When the monitored bias voltage exceeds the second reference voltage VR2, abnormality is judged by a voltage comparator 14. Warning is issued from a warning output terminal.
摘要翻译：目的：通过提供检测激光二极管的差分量子效率的波动并自动校正参考电压的电路，可以稳定高精度地监视偏置电流。构成：通过电阻器11将偏置电流转换成电压。由差分放大器13放大的输出即被监视的偏置电压VM中的调制分量的输出通过耦合电容器被引导到峰值检测器19 18并转换成直流电压VP。来自第三参考电压端子22的所述电压和第三参考电压VR3之间的差异由差分放大器20放大。通过调节差分放大器的放大系数G3，输出电压V3可以与误差电压DELTAV一致第一参考电压VR1和输出电压V3由加法器电路21相加，其作为第二参考电压VR2的输出与监视的偏置电压VM进行比较。当监视的偏置电压超过第二基准电压VR2时，由电压比较器14判断为异常。从警告输出端发出警告。

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