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1. 发明专利

JP2009260715A Cross-point detection circuit of receiving optical signal and optical receiving apparatus using the same 有权
标题翻译：接收光信号的交叉点检测电路和使用该光信号的光接收装置
公开(公告)号：JP2009260715A
公开(公告)日：2009-11-05
申请号：JP2008107988
申请日：2008-04-17
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , YAMAMOTO TAKASHI , KANDA ATSUSHI , NAKAMURA MAKOTO , TOBAYASHI MASATOSHI , ENDO MASAHIRO
IPC分类号： H04B10/2507 , H04B3/06 , H04B10/07 , H04B10/2513 , H04B10/2525 , H04B10/28 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69
摘要： PROBLEM TO BE SOLVED: To provide a cross-point detection circuit for easily detecting a cross-point of a receiving optical signal and also provide an optical receiving apparatus for optimum control of an electrical waveform equalizing circuit and an optical variable dispersion compensating circuit of the optical receiving apparatus using the detected cross-point value.
SOLUTION: A bias voltage is superimposed to a signal from which the DC element is cut off through AC coupling of an electrical signal photoelectrically converted from the receiving optical signal. The signal to which the bias voltage is superimposed is amplified with an automatic gain control amplifying circuit to detect an average voltage of output signal of this circuit. Moreover, a tap coefficient of the electrical waveform equalizing circuit is optimum-controlled using the detected average voltage value.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于容易地检测接收光信号的交叉点的交叉点检测电路，并且还提供用于最佳控制电波形均衡电路和光可变色散补偿的光接收装置使用所检测的交叉点值的光接收装置的电路。解决方案：通过从接收光信号光电转换的电信号的AC耦合，将偏置电压叠加到DC元件被切断的信号上。叠加偏置电压的信号用自动增益控制放大电路放大，以检测该电路的输出信号的平均电压。此外，使用检测到的平均电压值对电波形均衡电路的抽头系数进行最佳控制。版权所有（C）2010，JPO＆INPIT

2. 发明专利

JP2008242282A Digital control automatic bias control circuit 审中-公开
标题翻译：数字控制自动偏置控制电路
公开(公告)号：JP2008242282A
公开(公告)日：2008-10-09
申请号：JP2007085475
申请日：2007-03-28
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , NAKAHARA KAZURO , KIKUCHI KIYOTAKA
IPC分类号： G02F1/03 , G02F1/015
摘要： PROBLEM TO BE SOLVED: To provide a digital control automatic bias control circuit with simple circuit constitution that stably detects the phase of a low-frequency component included in an optical signal output from an optical modulator.
SOLUTION: The digital control automatic bias control circuit 100 operates so as to control a DC bias voltage applied to the optical modulator 104 to an optimum value by applying the DC bias voltage on which an electric signal varying in a rectangular wave shape is superposed to the optical modulator 104 and detecting the phase of the low-frequency component included in the optical signal output from the optical modulator 104. The optical signal output from the optical modulator 104 is converted into an electric signal, which is converted into a binary digital signal by a comparator circuit 108 in the digital control automatic bias control circuit 100. A phase comparator 109 compares the phase of the low-frequency signal applied to the optical modulator 104 with the phase of the comparator output, and the DC bias voltage applied to the optical modulator 104 is adjusted in steps according to the sign of the phase.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有简单的电路结构的数字控制自动偏置控制电路，其稳定地检测包括在从光调制器输出的光信号中的低频分量的相位。解决方案：数字控制自动偏置控制电路100通过施加以矩形波形变化的电信号为基础的DC偏置电压来操作，以将施加到光调制器104的DC偏置电压控制到最佳值叠加到光调制器104并且检测包括在从光调制器104输出的光信号中的低频分量的相位。从光调制器104输出的光信号被转换成电信号，其被转换为二进制数字信号通过数字控制自动偏置控制电路100中的比较器电路108进行。相位比较器109将施加到光调制器104的低频信号的相位与比较器输出的相位进行比较，并施加直流偏置电压根据相位符号来逐步调整光调制器104。版权所有（C）2009，JPO＆INPIT

3. 发明专利

JP2008245118A Optical receiver 审中-公开
标题翻译：光接收机
公开(公告)号：JP2008245118A
公开(公告)日：2008-10-09
申请号：JP2007085476
申请日：2007-03-28
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , KIKUCHI KIYOTAKA , SUGIE TOSHIHIKO
IPC分类号： H04B10/40 , H04B10/079 , H04B10/50 , H04B10/60 , H04B10/66
摘要： PROBLEM TO BE SOLVED: To provide an optical level detection circuit capable of detecting an optical level input to a VOA (variable optical attenuator) on the basis of a driving current of the VOA and a photo-current flowing through a photodetector for a main signal in an optical receiver including the VOA and the photodetector.
SOLUTION: In the optical receiver, the VOA 101 is electrically connected with a driving circuit 104, and a photodetector 102 is electrically connected with a bias application circuit 105. Current detection circuits 106, 107 are connected to the VOA 101 and the photodetector 102, and the current detection circuits 106, 107 are connected with an arithmetic circuit 108. The output of the current detection circuits 106, 107 is converted from an analog signal to a digital signal by A/D converters 109a, 109b and input to a microprocessor 110 that performs digital operation. The microprocessor 110 calculates an optical input level value from the driving current value of the VOA 101 and the photo-current value of the photodetector 102.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够基于VOA的驱动电流和流过光电检测器的光电流检测到VOA（可变光衰减器）的光电平输入的光电平检测电路，在包括VOA和光电检测器的光接收机中的主信号。解决方案：在光接收器中，VOA 101与驱动电路104电连接，光电检测器102与偏压施加电路105电连接。电流检测电路106,107连接到VOA101和光检测器102和电流检测电路106,107与运算电路108连接。电流检测电路106,107的输出由A / D转换器109a，109b从模拟信号转换成数字信号，并输入到执行数字操作的微处理器110。微处理器110根据VOA 101的驱动电流值和光电检测器102的光电流值来计算光输入电平值。（C）2009，JPO＆INPIT

4. 发明专利

JP2012178858A Cross-point detection circuit of receiving optical signal and optical receiving apparatus using the same 有权
标题翻译：接收光信号的交叉点检测电路和使用该光信号的光接收装置
公开(公告)号：JP2012178858A
公开(公告)日：2012-09-13
申请号：JP2012102398
申请日：2012-04-27
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , YAMAMOTO TAKASHI , KANDA ATSUSHI , NAKAMURA MAKOTO , TOBAYASHI MASATOSHI , ENDO MASAHIRO
IPC分类号： H04B10/158 , H04B10/18 , H04L25/03 , H04L25/497
摘要： PROBLEM TO BE SOLVED: To provide a cross-point detection circuit for easily detecting a cross-point of a receiving optical signal, and to provide an optical receiving apparatus for optimum control of an electrical waveform equalizing circuit and an optical variable dispersion compensating circuit of the optical receiving apparatus using a detected cross-point value.SOLUTION: Bias voltage is superimposed to a signal in which a DC element is cut off through AC coupling of an electrical signal photoelectrically converted from a receiving optical signal. The signal to which the bias voltage is superimposed is amplified with an automatic gain control amplifying circuit to detect an average voltage of an output signal of the circuit. Moreover, a tap coefficient of an electrical waveform equalizing circuit is optimum-controlled using the detected average voltage value.
摘要翻译：要解决的问题：提供一种用于容易地检测接收光信号的交叉点的交叉点检测电路，并且提供一种用于最佳控制电波形均衡电路和光可变色散的光接收装置使用检测出的交叉点值对光接收装置进行补偿电路。解决方案：通过从接收光信号光电转换的电信号的AC耦合，将偏置电压叠加到DC元件被切断的信号上。叠加偏置电压的信号用自动增益控制放大电路放大，以检测电路的输出信号的平均电压。此外，使用检测到的平均电压值对电波形均衡电路的抽头系数进行最佳控制。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2009141892A Optical reception characteristics automatically setting apparatus 有权
标题翻译：光接收特性自动设置
公开(公告)号：JP2009141892A
公开(公告)日：2009-06-25
申请号：JP2007318845
申请日：2007-12-10
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , KIKUCHI KIYOTAKA , SUGIE TOSHIHIKO
IPC分类号： H04B10/40 , H04B10/07 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69
摘要： PROBLEM TO BE SOLVED: To provide an optical reception characteristics automatically setting apparatus of an optical receiver for optimizing reference levels and discrimination levels of the receiver.
SOLUTION: The received optical signal is converted into an electrical signal by an avalanche diode (APD) 103, and the converted signal is amplified by a trans-impedance amplifier (TIA) 107. The electrical signal output from the TIA 107 is input to a clock data reproduction (CDR) circuit 111 via a limiter amplifier (LIM) 109. The average voltages of the output side of the LIM 109 are branched before being AC coupled so that the positive and negative voltages are respectively detected by a voltage monitor circuit 204. Based on the average voltages detected by the voltage monitor circuit 204, an optical reception characteristics control circuit 115 optimizes reference levels and discrimination levels of a TIA reference voltage control circuit 108, limiter reference voltage control circuit 110, and CDR discrimination level control circuit 112.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于优化接收机的参考电平和鉴别电平的光接收机的光接收特性自动设置装置。解决方案：接收到的光信号由雪崩二极管（APD）103转换成电信号，转换后的信号由跨阻放大器（TIA）107放大。从TIA 107输出的电信号是经由限幅放大器（LIM）109输入到时钟数据再现（CDR）电路111.LM109的输出侧的平均电压在交流耦合之前分支，使得正和负电压分别由电压基于由电压监视电路204检测的平均电压，光接收特性控制电路115优化TIA参考电压控制电路108，限幅器参考电压控制电路110和CDR辨别电平的参考电平和鉴别电平控制电路112.版权所有（C）2009，JPO＆INPIT

6. 发明专利

JP2009060533A Lock detection and operation alarm detection circuit 有权
标题翻译：锁定检测和操作报警检测电路
公开(公告)号：JP2009060533A
公开(公告)日：2009-03-19
申请号：JP2007228251
申请日：2007-09-03
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , KIKUCHI KIYOTAKA , NAKAHARA KAZURO
IPC分类号： H04B10/516 , G02F1/03 , H04B10/07 , H04B10/524 , H04B10/54 , H04B10/61
摘要： PROBLEM TO BE SOLVED: To provide a lock and operation alarm detection circuit for measuring a control voltage from a digital signal of an ABC circuit.
SOLUTION: A light signal outputted from an optical modulator 104 is converted to an electric signal and then is converted to a binary digital signal by a comparator circuit 108 in a digital control automatic bias control circuit 100. A phase comparator 109 compares the phase of a low-frequency signal applied to the optical modulator 104 with that of comparator output, and an adder-subtractor 110 outputs a value added and subtracted according to the code of the phase. A threshold determination circuit 121 operates an alarm circuit 123, when the output value of the adder-subtractor 110 is out of a prescribed range or the amount of change in the output value of the adder-subtractor 110 over a prescribed time interval is larger than a prescribed value.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于从ABC电路的数字信号测量控制电压的锁定和操作报警检测电路。解决方案：从光调制器104输出的光信号被转换为电信号，然后由数字控制自动偏置控制电路100中的比较器电路108转换成二进制数字信号。相位比较器109将施加到光调制器104的低频信号与比较器输出的低频信号的相位，加法器 - 减法器110输出根据相位代码相加和减去的值。当加法器 - 减法器110的输出值超出规定范围或加法器 - 减法器110的输出值在规定时间间隔内的变化量大于阈值确定电路121时，阈值确定电路121操作报警电路123 一个规定的值。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2009060532A Variable-wavelength optical transceiver, and optical transmission system 审中-公开
标题翻译：可变波长光学收发器和光传输系统
公开(公告)号：JP2009060532A
公开(公告)日：2009-03-19
申请号：JP2007228250
申请日：2007-09-03
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , OGIWARA KOICHI , KIKUCHI KIYOTAKA
IPC分类号： H04B10/00 , H04B10/07 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/564 , H04B10/572 , H04B10/60 , H04B10/67 , H04B10/69
摘要： PROBLEM TO BE SOLVED: To provide a variable-wavelength optical transceiver capable of compensating wavelength dependence at a reception section, and to provide an optical transmission system.
SOLUTION: The variable-wavelength optical transceiver and optical transmission system include a wavelength setting information reception section, an optical transmission section, and an optical reception section. Wavelength information received by the wavelength setting information reception section is shared by the optical transmission and reception sections inside the variable-wavelength optical transceiver, thus changing parameters at the optical reception section according to wavelengths along with the wavelength of an output signal at the optical transmission section, and hence allowing the optical reception section to change to reception characteristics corresponding to the wavelength of light to be received. In this case, although it is assumed that the same wavelength on an ITU grid, or the like is used for transmission signal wavelengths and reception signal wavelengths, the wavelength setting information reception section receives two pieces of different wavelength information to also cope with a case when the transmission signal wavelength differs from the reception signal wavelength.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供能够补偿接收部分的波长依赖性的可变波长光收发器，并提供光传输系统。解决方案：可变波长光收发器和光传输系统包括波长设置信息接收部分，光传输部分和光接收部分。由波长设定信息接收部接收的波长信息由可变波长光收发器内的光发送接收部共享，因此根据波长与光传输时的输出信号的波长一致地改变光接收部的参数并且因此允许光接收部分变为对应于要接收的光的波长的接收特性。在这种情况下，虽然假设ITU格栅上的相同波长等用于发送信号波长和接收信号波长，但是波长设置信息接收部分接收两条不同波长的信息，以处理一种情况当发送信号波长与接收信号波长不同时。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2009058910A Adjusting device for optical modulator driver and adjusting method thereof 有权
标题翻译：用于光调制器驱动器的调节装置及其调节方法
公开(公告)号：JP2009058910A
公开(公告)日：2009-03-19
申请号：JP2007228252
申请日：2007-09-03
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , TANAKA KATSUYA , KIKUCHI KIYOTAKA
IPC分类号： G02F1/03
摘要： PROBLEM TO BE SOLVED: To provide an adjusting device for optical duobinary modulation type optical modulator driver and an adjusting method of the optical duobinary modulation type optical modulator driver capable of performing the adjustment of cross-points of output amplitude and driving waveform of a driver circuit of an optical duobinary modulation type optical modulator on the basis of an optical modulation waveform observed while operating an ABC circuit. SOLUTION: The adjusting device for optical duobinary modulation type optical modulator driver is configured as follow: modulated light output from the optical modulator 103 is transduced to an electric signal by an optical/electric transducer (O/E) 108 and is input to a sampling scope 109; an ABC circuit is operated, at the same time, a pseudo random signal is produced by a driving signal producing circuit 104 to drive the optical modulator and an optical modulation waveform is observed by a sampling scope 109; a driver control circuit 101 performs the adjustment of the cross-points of the driver circuit 105 so that the distortion of the optical modulation waveform observed by the sampling scope may be reduced; and, further, the driver control circuit 101 performs the adjustment of the output amplitude of the driver circuit 105 so that modulated light power may become the largest. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于光学双二进制调制型光调制器驱动器的调整装置和能够执行输出振幅和驱动波形的交叉点的调整的光学双二进制调制型光调制器驱动器的调整方法基于在操作ABC电路时观察到的光调制波形的光学双二进制调制型光调制器的驱动电路。光二调制型光调制器驱动器的调整装置的结构如下：从光调制器103输出的调制光通过光电换能器（O / E）108转换成电信号，并被输入到采样范围109; 操作ABC电路，同时由驱动信号产生电路104产生伪随机信号以驱动光调制器，并通过采样范围109观察光调制波形; 驱动器控制电路101执行驱动电路105的交叉点的调整，使得可以减少由采样范围观察到的光调制波形的失真; 此外，驱动器控制电路101执行驱动电路105的输出振幅的调整，使得调制的光功率可能变得最大。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2008242283A Optical modulating device and optical transmitting device 审中-公开
标题翻译：光学调制装置和光传输装置
公开(公告)号：JP2008242283A
公开(公告)日：2008-10-09
申请号：JP2007085477
申请日：2007-03-28
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , NAKAHARA KAZURO , KIKUCHI KIYOTAKA
IPC分类号： G02F1/03 , H04B10/07 , H04B10/516 , H04B10/572 , H04B10/61
摘要： PROBLEM TO BE SOLVED: To provide an optical modulating device capable of correcting a shift of the operation point of a controlled optical modulator from the optimum point by an ABC circuit to which a monitor signal having a bias shift is input, and an optical transmitting device.
SOLUTION: An adding circuit 103 logic-inverts the monitor signal input from the optical modulator 101 and a low-frequency signal input from a variable ATT 108 and output from a low-frequency generating circuit 110, and adds them to an offset signal attenuated by an arbitrary amount. The adding circuit 103 adds the monitor signal and offset signal to each other and outputs the addition signal to a synchronous detection circuit 104. The synchronous detection circuit 104 detects the low-frequency signal component superposed on the addition signal and outputs it to an integrating circuit 106 through an LPF 105. The integrating circuit 106 generates an operation point control signal based upon the low-frequency signal component detected from the addition signal, and an adding circuit 107 adds the operation point control signal and low-frequency signal to each other and applies the resulting signal to the optical modulator 101.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供一种光调制装置，其能够通过输入具有偏移偏移的监视信号的ABC电路从最佳点校正受控光调制器的操作点的偏移，以及光发射装置。解决方案：加法电路103对从光调制器101输入的监视信号和从变量ATT 108输入的低频信号进行逻辑反相，并从低频发生电路110输出，并将其相加信号衰减任意量。加法电路103将监视信号和偏移信号彼此相加，并将相加信号输出到同步检测电路104.同步检测电路104检测叠加在加法信号上的低频信号分量，并将其输出到积分电路积分电路106基于从加法信号检测出的低频信号分量产生操作点控制信号，加法电路107将操作点控制信号和低频信号彼此相加，将所得到的信号应用于光学调制器101.版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2004233686A Light transmission method 审中-公开
公开(公告)号：JP2004233686A
公开(公告)日：2004-08-19
申请号：JP2003022565
申请日：2003-01-30
申请人： Mitsubishi Cable Ind Ltd , Nippon Telegr & Teleph Corp , 三菱電線工業株式会社 , 日本電信電話株式会社
发明人： SUZUKI AKIHITO , FUJITA MORIYUKI , TANAKA MASATOSHI , KUBOTA HIROKAZU , SUZUKI KAZUNOBU , KAWANISHI SATOKI
IPC分类号： G02B6/00 , G02B6/032 , G02B6/20
摘要： PROBLEM TO BE SOLVED: To provide a method of transmitting light in a single mode to a photonic crystal fiber. SOLUTION: With the photonic crystal fiber 10 comprising a solid core 11 which extends in the longitudinal direction and a clad 12 which is formed with a prescribed grid pattern in the fiber cross section by means of a plurality of fine holes 12a installed in a manner covering and extending along the core 11, and which is thus formed with a photonic crystal structure in the radial direction of the fiber; the core 11 is made to transmit light so that normalized frequency V eff defined in the following relational expression becomes 4.1-12.0: V eff =2π×(Λ/λ)×√ä(refractive index of core) 2 -(effective refractive index of clad) 2 } where Λ is the hole pitch of the fine holes 12a of the photonic crystal fiber 10 and λ is the wavelength of light to be transmitted to the core 11. COPYRIGHT: (C)2004,JPO&NCIPI

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