-
公开(公告)号：US5900621A
公开(公告)日：1999-05-04
申请号：US903104
申请日：1997-07-30
CPC分类号： G02F1/0123 , H04B10/505 , H04B10/50575 , H04B10/50595 , H04B10/564
摘要： In a light transmitter comprises an automatic bias control circuit which automatically controls a bias for an external modulator, a part of a light output/input signal of the external modulator is branched to detect an electrical monitor signal and a gain control signal is generated in inverse proportion to the level of the monitor signal to control the gain of the automatic bias control circuit.
摘要翻译： 在光发射机包括自动偏置控制电路，其自动控制外部调制器的偏置，外部调制器的光输出/输入信号的一部分被分支以检测电监视信号，并且产生增益控制信号 与监视信号的电平成比例，以控制自动偏置控制电路的增益。
-
2.发明授权
公开(公告)号：US6040931A
公开(公告)日：2000-03-21
申请号：US859253
申请日：1997-05-20
IPC分类号： H04J14/00 , H04B10/07 , H04B10/2507 , H04J14/02 , H04B10/08
CPC分类号： H04J14/02 , H04B10/504 , H04B10/506 , H04B10/564
摘要： An optical transmitter, a terminal-station apparatus having the optical transmitter, and an optical communication system employing the terminal-station apparatus. The optical transmitter comprises: a light-source unit for generating an optical signal; a monitor unit for monitoring a parameter depending on the wavelength of the optical signal; a judgment unit for determining as to whether or not the monitored parameter satisfies a predetermined condition; and a shut-off unit for shutting off the optical signal in case the monitored parameter does not satisfy the predetermined condition. By using the optical transmitter, it can be possible to prevent crosstalk from occurring between WDM (Wavelength Division Multiplexing) channels in the optical communication system.
摘要翻译： 具有光发送机的光发送机，终端装置以及采用终端装置的光通信系统。 光发射机包括：用于产生光信号的光源单元; 监视单元，用于根据所述光信号的波长监视参数; 判断单元，用于确定所监视的参数是否满足预定条件; 以及用于在所监视的参数不满足预定条件的情况下关闭光信号的截止单元。 通过使用光发射机，可以防止在光通信系统中的WDM（波分复用）信道之间发生串扰。
-
公开(公告)号：US06697546B2
公开(公告)日：2004-02-24
申请号：US09748863
申请日：2000-12-28
IPC分类号： G02B635
CPC分类号： H04Q11/0062 , H04J14/0212 , H04J14/0283 , H04J14/0289 , H04J14/0291 , H04J14/0295 , H04J14/0297 , H04Q2011/0081 , H04Q2011/0092
摘要： A protection switch is configured for an input optical signal using an n×n optical switch. Furthermore, a signal to be added and dropped is also configured using an n×n optical switch. Especially, the n×n optical switch uses a complete group switch. Thus, a signal can be output from any input port to any output port. Therefore, a more extensible NPE can be configured at an optical signal level, and a switch is simple and less expensive. As a result, unlike the conventional technology, an NPE itself can be simple and less expensive.
-
公开(公告)号：US4961057A
公开(公告)日：1990-10-02
申请号：US289049
申请日：1988-12-23
申请人： Sadao Ibukuro
发明人： Sadao Ibukuro
CPC分类号： H04B3/04
摘要： An AGC amplifier for compensating a signal loss in a cable through which a signal having a frequency is passed, the signal loss being defined as a function of a square-root of the frequency, having a wide compensation ability and adaptable to the forming of a LSI circuit construction. The AGC amplifier includes a first amplifier (10) amplifying an input signal (IN) to be compensated at a first gain (A.sub.0), a differential circuit (40) having a constant differential coefficient defined by the frequency, and differentiating the input signal at the differential coefficient, a second amplifier (20) amplifying the differentiated signal at a second gain (A.sub.1), and an adding circuit (30) adding the amplified signals therefrom to output an output signal (OUT) in which the signal loss is compensated.
-
公开(公告)号：US20070071443A1
公开(公告)日：2007-03-29
申请号：US11320946
申请日：2005-12-30
申请人： Katsumi Fukumitsu , Sadao Ibukuro
发明人： Katsumi Fukumitsu , Sadao Ibukuro
IPC分类号： H04J14/02
CPC分类号： H04J3/1611 , H04J3/07
摘要： A signal multiplexing apparatus has an OPU/ODU processing unit putting a local protocol signal into an OPU/ODU signal, an ODTU processing unit generating an ODTU signal from the OPU/ODU signal, a read-out position detecting unit detecting a read-out position at the time that the OPU-ODU processing unit reads out the local protocol signal, and a stuff allocation controlling unit allocating a stuff control amount to be used when the OPU/ODU processing unit puts the local protocol signal into the OPU/ODU signal and a stuff control amount to be used when the ODTU processing unit generates the ODTU signal, on the basis of the read-out position detected by the read-out position detecting unit. The signal multiplexing apparatus can effectively absorb an amount of fluctuation in bit rate when asynchronously multiplexing the local protocol signal such as a 10GE signal in an optical transport network.
摘要翻译： 信号复用装置具有将本地协议信号置于OPU / ODU信号中的OPU / ODU处理单元，从OPU / ODU信号生成ODTU信号的ODTU处理单元，检测出读出的读出位置检测单元 在OPU-ODU处理单元读出本地协议信号时的位置，以及当OPU / ODU处理单元将本地协议信号放入OPU / ODU信号时分配要使用的填充控制量的填充分配控制单元 以及当ODTU处理单元基于由读出位置检测单元检测到的读出位置产生ODTU信号时使用的填充控制量。 信号复用装置能够有效地吸收在光传输网络中异步多路复用诸如10GE信号之类的本地协议信号时的比特率波动量。
-
公开(公告)号：US06807245B2
公开(公告)日：2004-10-19
申请号：US10211232
申请日：2002-08-05
申请人： Sadao Ibukuro , Setsuo Misaizu , Isao Nakajima
发明人： Sadao Ibukuro , Setsuo Misaizu , Isao Nakajima
IPC分类号： H03D324
摘要： There is provided a PLO device which performs high-accuracy, high-quality clock recovery. A shifted data generation part generates shifted data, and a first phase comparison part outputs first difference data. A first filter removes an alternating-current component from the first difference data and outputs a first detection voltage. A delay part delays input data for a time corresponding to half of one time slot with the use of an analog delay element and outputs delayed data. A second phase comparison part compares the phases of the input data and delayed data with each other and outputs second difference data. A second filter removes an alternating-current component from the second difference data and outputs a second detection voltage. An arithmetic section divides the first detection voltage by the second detection voltage to obtain a control voltage. A clock oscillation section outputs recovered clock based on the control voltage.
摘要翻译： 提供了一种执行高精度，高质量时钟恢复的PLO设备。 移位数据生成部生成移位数据，第一相位比较部输出第一差分数据。 第一滤波器从第一差分数据中去除交流分量并输出第一检测电压。 延迟部分使用模拟延迟元件在一个时隙的一半时间内延迟输入数据并输出延迟数据。 第二相位比较部分将输入数据和延迟数据的相位彼此进行比较，并输出第二差分数据。 第二滤波器从第二差分数据中去除交流分量并输出第二检测电压。 运算部将第一检测电压除以第二检测电压，得到控制电压。 时钟振荡部分根据控制电压输出恢复时钟。
-
公开(公告)号：US07095961B2
公开(公告)日：2006-08-22
申请号：US09949087
申请日：2001-09-10
申请人： Sadao Ibukuro
发明人： Sadao Ibukuro
IPC分类号： H04B10/00
CPC分类号： H04B10/6931 , H04B10/67 , H04B10/673
摘要： An optical transmitter transmits a data signal developing a specific spectrum at a predetermined frequency, while an optical receiver detects amplitude information on the spectrum included in the data signal to control the received data signal to a constant amplitude on the basis of the detected amplitude information. This can provide an optical communication system and an optical receiver capable of functioning well even if the optical S/N is in a poor condition.
摘要翻译： 光发射机以预定频率发送开发特定频谱的数据信号，同时光接收机检测包括在数据信号中的频谱的幅度信息，以根据检测到的幅度信息控制接收到的数据信号为恒定幅度。 这可以提供即使光学S / N处于差的状态下也能够良好地工作的光通信系统和光接收机。
-
8.发明授权Optical modulator with reduced deterioration of optical waveform in high frequency band 有权光学调制器，降低了高频带光波形的劣化公开(公告)号：US06674927B2
公开(公告)日：2004-01-06
申请号：US09942738
申请日：2001-08-31
申请人： Sadao Ibukuro
发明人： Sadao Ibukuro
IPC分类号： G02F1035
CPC分类号： G02F1/0327 , G02F1/2255
摘要： In an optical modulator having an electric waveguide and an optical waveguide, a filter converts a modulating signal into a signal equalizing a frequency characteristic of an acting amount to be provided to the electric waveguide. Also, the filter approximates the frequency characteristic of the acting amount caused by a skin effect in the electric waveguide.
摘要翻译： 在具有电波导和光波导的光调制器中，滤波器将调制信号转换成均衡要提供给电波导的作用量的频率特性的信号。 此外，滤波器近似于由电波导中的皮肤效应引起的作用量的频率特性。
-
公开(公告)号：US06573985B2
公开(公告)日：2003-06-03
申请号：US09791847
申请日：2001-02-26
申请人： Sadao Ibukuro , George Ishikawa
发明人： Sadao Ibukuro , George Ishikawa
IPC分类号： G01N2100
CPC分类号： G01M11/335 , G01M11/333 , G01M11/336
摘要： A signal having a low frequency fm is superposed on a signal having a high frequency f1. The light having the frequency fs is modulated and transmitted to a transmission line as a wavelength dispersion measurement light. A local oscillation light is multiplexed with the wavelength dispersion measurement light, and heterodyne-detected on a receiving side. Sideband components generated by modulating the frequency fs within the heterodyne-detected wavelength dispersion measurement light are extracted by bandpass filters, and the wavelength dispersion value of the transmission line is calculated by detecting the phase difference between the sideband components.
-
-
-
-
-
-
-
-
搜索结果
9 条记录 (耗时 0.02 秒)
