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1.发明授权
公开(公告)号：US6115156A
公开(公告)日：2000-09-05
申请号：US964528
申请日：1997-11-05
IPC分类号： G02B6/28 , H04B10/2507 , H04B10/2519 , H04B10/27 , H04B10/29 , H04J14/00 , H04J14/02
CPC分类号： H04B10/2941 , H04B10/2519 , H04J14/02 , H04B2210/252 , H04B2210/258 , H04J14/0221
摘要： A demultiplexer device is used in a wavelength-division multiplexed optical fiber communication line to achieve efficient dispersion compensation and loss compensation as well as a reduction of active devices such as optical amplifiers. The demultiplexer device has a series of couplers disposed in multi-stages from the input of the demultiplexer. Each coupler has two branches with one branch of each coupler connected to a separate optical filter and the other branches are series connected to a subsequent stage of the couplers through equalizing fibers, except for the final stage which has its second branch connected to an optical filter for the shortest wavelength transmitted. The equalizing fibers are thus serially connected between couplers and act to perform a cumulative dispersion compensation. The quantity of the equalizing fibers can thus be reduced as a whole, and as a result the attenuation amount also decreases, so that the number of optical amplifiers can be reduced.
摘要翻译： 解复用器装置用于波分复用光纤通信线路中，以实现有效的色散补偿和损耗补偿以及减少诸如光放大器之类的有源器件。 多路分解器装置具有从多路分解器的输入端以多级布置的一系列耦合器。 每个耦合器具有两个分支，每个耦合器的一个分支连接到单独的滤光器，并且其它分支通过均衡纤维串联连接到耦合器的后续阶段，除了最后一级，其第二分支连接到滤光器 对于最短的波长传输。 均衡纤维因此串联连接在耦合器之间并用于执行累积色散补偿。 因此，均匀纤维的量可以整体上减少，结果衰减量也减小，从而可以减少光放大器的数量。
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公开(公告)号：US5138621A
公开(公告)日：1992-08-11
申请号：US680393
申请日：1991-04-04
申请人： Koji Goto , Shu Yamamoto , Yukio Horiuchi , Hiroharu Wakabayashi
发明人： Koji Goto , Shu Yamamoto , Yukio Horiuchi , Hiroharu Wakabayashi
IPC分类号： G02B6/02 , C03C13/04 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/0915 , H01S3/094 , H01S3/10 , H01S3/13 , H01S3/131 , H04B10/032 , H04B10/079 , H04B10/29 , H04B10/293
CPC分类号： H01S3/1301 , H01S3/094003 , H01S3/09408 , H01S5/06825
摘要： A pumping light source drive system is disclosed for driving pumping light sources of an optical amplifier which is composed of a rare earth doped optical fiber doped with a rare earth element and said pumping light sources. The pumping light sources are always held in operation. The output signal power at the output of the rare earth doped optical fiber or the combined power of the pumping light sources is detected and compared with a predetermined reference power to control the output power of the pumping light sources, so that the output signal power or the combined power of the pumping light sources reaches a predetermined value.
摘要翻译： 公开了一种用于驱动由掺杂有稀土元素的稀土掺杂光纤和所述泵浦光源组成的光放大器的泵浦光源的泵浦光源驱动系统。 泵浦光源始终保持运行。 检测稀土掺杂光纤的输出端的输出信号功率或泵浦光源的组合功率，并将其与预定的参考功率进行比较，以控制泵浦光源的输出功率，使输出信号功率或 泵浦光源的组合功率达到预定值。
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公开(公告)号：US5471333A
公开(公告)日：1995-11-28
申请号：US125428
申请日：1993-09-22
IPC分类号： G02F1/35 , H04B10/2507 , H04B10/2525 , H04B10/299 , H04B10/508 , H04B10/524 , H04B10/58 , H04B10/00 , H04B10/12
CPC分类号： H04B10/25077
摘要： An optical transmission system is disclosed, in which the transmission of the optical soliton pulses is controlled by controlling the wavelength dispersion of the optical fiber transmission line for each long section including a plurality of optical amplifier repeaters. In this case,the first sections having an average value of the wavelength dispersion larger than the dispersion value meeting with the soliton condition and the second sections having an average value of the wavelength dispersion smaller than the dispersion value meeting with the soliton condition are alternatively allocated in the optical fiber transmission line, so that the average value of the wavelength dispersion of the entire length of the optical fiber transmission line assumes a positive value.
摘要翻译： 公开了一种光传输系统，其中通过控制包括多个光放大器中继器的每个长部分的光纤传输线的波长色散来控制光孤子脉冲的传输。 在这种情况下，交替地分配具有大于满足孤子条件的色散值的波长色散的平均值的第一部分和具有小于满足孤立条件的色散值的波长色散的平均值的第二部分 在光纤传输线中，使得光纤传输线的整个长度的波长色散的平均值为正值。
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公开(公告)号：US5406368A
公开(公告)日：1995-04-11
申请号：US175924
申请日：1993-12-30
CPC分类号： G01M11/335 , G01M11/333 , G01M11/338 , G01N21/41
摘要： A chromatic dispersion measuring method and apparatus are disclosed which permit highly accurate measurements of the wavelength dispersion characteristic of an optical transmission such as an optical fiber or an optical amplifier repeater system. Measurements are made on the propagation time of a first optical signal of a fixed wavelength through an optical transmission line to be measured and the propagation time through the same optical transmission line of a second optical signal whose wavelength can be arbitrarily set over the measuring wavelength band. By obtaining a difference between the both propagation times, it is possible to obtain only a change in the propagation time of each signal which is caused by a change in the wavelength of the second optical signal. That is, the elongation or shrinkage of the optical fiber has an equal influence on both of the first optical signal and the second optical signal, and hence does not induce an error in the detection of the above-said time difference.
摘要翻译： 公开了一种色散测量方法和装置，其允许对诸如光纤或光放大器中继器系统的光传输的波长色散特性进行高度精确的测量。 通过待测量的光传输线对固定波长的第一光信号的传播时间进行测量，以及通过波长可以在测量波长带上任意设置的第二光信号的相同光传输线的传播时间 。 通过获得两个传播时间之间的差异，可以仅获得由第二光信号的波长的变化引起的每个信号的传播时间的变化。 也就是说，光纤的伸长率或收缩对第一光信号和第二光信号都具有相同的影响，因此不会在上述时间差的检测中引起误差。
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公开(公告)号：US4313224A
公开(公告)日：1982-01-26
申请号：US146687
申请日：1980-05-05
IPC分类号： G01M11/00 , H04B10/00 , H04B10/035 , H04B10/07 , H04B10/077 , H04B10/079 , H04B10/29 , H04B17/00 , H04B9/00
CPC分类号： H04B10/2918 , H04B10/077 , H04B10/07955
摘要： The operation of a laser in an optical repeater in an optical transmission system using an optical fiber cable is telemonitored at a terminal station by changing the mark ratio of the test signal which is transmitted from the terminal station to the circuit. Each of the repeaters has an optical-electrical conversion element for the conversion of the input optical energy to electrical energy, an amplifier for amplifying the electrical output of said conversion element, a laser for converting the electrical output of the amplifier to an optical output power, a device for controlling the optical output power of the laser, a switch for providing the signal return path between the upward circuit and the downward circuit, and a monitoring circuit having a reference voltage generator for providing a reference lever which is lower than the normal signal level when the signal has the mark ratio of 1/2, and a comparator for comparing the laser output with the reference level, and a device for turning OFF the switch when the monitoring circuit provides the output signal indicating that the laser output is equal to the reference level. The terminal station designates the particular repeater and closes the switch of the designated repeater, then, transmits the test signal having the controlled mark ratio. That test signal returns to the terminal station reflected by that closed switch. By adjusting the mark ratio of the test signal, the monitoring circuit of the repeater provides the output when the laser output equals to the reference level, and has the switch turned OFF. Thus, the terminal station recognizes the degree of the degration of the laser from the mark ratio when the circuit is broken.
摘要翻译： 使用光纤电缆的光传输系统中的光中继器中的激光器的操作通过改变从终端发送到电路的测试信号的标记比在终端进行远程监控。 每个中继器具有用于将输入光能转换为电能的光电转换元件，用于放大所述转换元件的电输出的放大器，用于将放大器的电输出转换为光输出功率的激光器 ，用于控制激光器的光输出功率的装置，用于在向上电路和向下电路之间提供信号返回路径的开关，以及具有用于提供低于正常电压的参考电压的参考电压发生器的监视电路 当信号具有1/2的标记比率的信号电平和用于将激光输出与基准电平进行比较的比较器以及当监视电路提供表示激光输出相等的输出信号时关闭开关的装置 到参考水平。 终端指定特定中继器并关闭指定中继器的开关，然后发送具有受控标记比率的测试信号。 该测试信号返回由该闭合开关反射的终端站。 通过调整测试信号的标记比例，当激光输出等于参考电平时，中继器的监视电路提供输出，并将开关置于OFF状态。 因此，当电路断开时，终端从识别率识别出激光的衰减程度。
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公开(公告)号：US5140452A
公开(公告)日：1992-08-18
申请号：US636863
申请日：1991-01-02
申请人： Shu Yamamoto , Hidenori Taga , Noboru Edagawa , Yoshihiro Yoshida , Shiro Ryu , Hiroharu Wakabayashi
发明人： Shu Yamamoto , Hidenori Taga , Noboru Edagawa , Yoshihiro Yoshida , Shiro Ryu , Hiroharu Wakabayashi
IPC分类号： G02B6/00 , G02F2/00 , H04B10/00 , H04B10/2525 , H04B10/508 , H04B10/524 , H04B10/54 , H04B10/588
CPC分类号： H04B10/505
摘要： In a long-distance high-speed optical communication scheme in which multiple optical amplifiers are provided at a large number of stages in optical fibers, an optical signal from a light source which has a desired small line width and oscillates at a single wavelength is modulated at a high speed by an external modulator and then transmitted in the fibers which are dispersion shifted optical fibers, the zero-dispersion wavelength in which is set to be larger than the oscillation wavelength of the light source. Therefore, noises and the modulation instability, which would occur due to the phase fluctuation in the oscillation wavelength of the light source, and the influence of a waveform distortion due to the dispersion in the optical fibers can be avoided to make it possible for the first time in history to transmit the optical signals at the high-speed in the long-distance optical communication system employing the optical amplifiers.
摘要翻译： 在光纤中以多个阶段提供多个光放大器的长距离高速光通信方式中，来自具有期望的小线宽并且以单个波长振荡的光源的光信号被调制 通过外部调制器以高速度传输，然后在作为色散位移光纤的光纤中传输，其中零色散波长被设置为大于光源的振荡波长。 因此，可以避免由于光源的振荡波长的相位波动而产生的噪声和调制不稳定性，以及由于光纤中的色散引起的波形失真的影响，使得第一 在使用光放大器的长距离光通信系统中以高速传输光信号的历史时间。
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7.发明授权
公开(公告)号：US4933990A
公开(公告)日：1990-06-12
申请号：US222194
申请日：1988-07-21
CPC分类号： H04B10/27
摘要： An optical privacy communication system in optical fiber communications between many points is disclosed in which, each station is provided with a privacy circuit. Each privacy circuit comprises a first optical branch for connecting the station to first and second optical branches, a second optical branch for connecting the first and second optical branches to the optical fiber transmission line, an optical isolator inserted in the first optical branch, for passing only a signal of a direction from the first optical branch to the second optical branch, and an optical filter inserted in the second optical branch, for passing only an optical signal of a frequency assigned to the station, so that an optical privacy communication is carried out between the stations.
摘要翻译： 公开了在许多点之间的光纤通信中的光学隐私通信系统，其中每个站设置有隐私电路。 每个隐私电路包括用于将站连接到第一和第二光分支的第一光分支，用于将第一和第二光分支连接到光纤传输线的第二光分支，插入第一光分支中的光隔离器，用于通过 仅从第一光分支到第二光分支的方向的信号，以及插入到第二光分支中的光滤波器，用于仅通过分配给该电台的频率的光信号，从而携带光隐私通信 在车站之间。
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公开(公告)号：US4257675A
公开(公告)日：1981-03-24
申请号：US22143
申请日：1979-03-20
CPC分类号： B21C37/151 , B21C37/0803 , G02B6/4407 , G02B6/4427 , G02B6/4488 , G02B6/4489 , G02B6/4491
摘要： An optical-fiber submarine cable, in which a combination is provided by a thin, cylindrical pressure resisting sheath, and a reinforcing member of a cross section inserted by the thin, cylindrical pressure resisting sheath so as to divide the circular cross section of the pressure resisting sheath into a plurality of spaces and to have a required withstand pressure; and in which at least one low-loss optical fiber is inserted in each of the plurality of spaces. The combination can be fabricated by separately paying out the reinforcing member and the thin, cylindrical pressure resisting sheath, or by curving inwardly a sheet of tape being paid out.
摘要翻译： 一种光纤海底电缆，其中通过薄的圆柱形耐压护套提供组合，以及由薄的圆柱形耐压护套插入的横截面的加强构件，以便将压力的圆形横截面 将护套抵抗多个空间并具有所需的耐压; 并且其中在所述多个空间中的每一个中插入至少一个低损耗光纤。 组合可以通过单独地支付加强构件和薄的圆柱形耐压护套，或者通过向内弯曲一张正在支付的带的片材来制造。
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公开(公告)号：US4278850A
公开(公告)日：1981-07-14
申请号：US28312
申请日：1979-04-09
CPC分类号： H04B10/0777 , H04B10/29 , H04B2210/072
摘要： The error rate and the operation of repeaters inserted in an optical transmission line are monitored at the terminal station on land by transmitting the test signal and monitoring the response signal of repeaters through the optical data transmission line without utilizing interstitial copper pair. Each repeater has the particular identification code, and the transmission terminal transmits the test code having the repeater identification code and an acknowledgement block with an empty bit position on the time divisional basis with the data to be transmitted. The repeater which finds his identification code in the test code, inserts the response in the acknowledgement block, and repeats the signal including both said test code and the data to be transmitted. The reception terminal analyzes the response signal of each repeater to determine the error rate of each repeaters.
摘要翻译： 通过发送测试信号并通过光数据传输线监视中继器的响应信号，而不使用间隙铜对，在陆上的终端站监视插入在光传输线路中的中继器的错误率和操作。 每个中继器具有特定的识别码，并且发送终端以具有中继器识别码的测试码和具有时间分割的空比特位置的确认块与要发送的数据进行发送。 在测试代码中找到他的识别码的中继器将响应插入到确认块中，并重复包括所述测试码和要发送的数据的信号。 接收终端分析每个中继器的响应信号，以确定每个中继器的错误率。
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公开(公告)号：US4211920A
公开(公告)日：1980-07-08
申请号：US710
申请日：1979-01-03
申请人： Hiroharu Wakabayashi
发明人： Hiroharu Wakabayashi
IPC分类号： H04B10/07 , G01M11/00 , H04B10/00 , H04B10/077 , H04B10/16 , H04B10/29 , H04B17/40 , H04L25/02 , H04B9/00 , H04B3/46
CPC分类号： H04B10/0777 , H04B10/29 , H04B2210/074
摘要： An optical repeating path fault location system for a PCM optical transmission system which is composed of a backward transmission path and a forward transmission path respectively formed of separated optical fibers and having disposed therein a plurality of PCM optical regenerative repeaters at the same repeating positions for the transmission paths. For each of the transmission paths at each repeater position, there are provided a detector for extracting from each one of the transmission paths at least one of frequency signal components individually assigned to the repeaters to provide a detected output, and pulse generating means responsive to the detected output to generate a predetermined common test pattern pulse train for applying as an optical signal to the input portion of the corresponding repeater in each the other of the transmission paths. Repeater identify signals including the frequency signal components respectively assigned to the sequentially disposed PCM regenerative repeaters of each one of the transmission paths are sequentially transmitted from a signal transmitting station of each one of the transmission paths. Each the other of the transmission paths is monitored for a fault on the basis of the reception result of the test pattern pulse train received by the signal transmitting station via each the other of the transmission paths.
摘要翻译： 一种用于PCM光传输系统的光学重复路径故障定位系统，其由分离的光纤分别形成的反向传输路径和正向传输路径组成，并且在相同的重复位置处设置有多个PCM光学再生中继器 传输路径。 对于每个中继器位置的每个传输路径，提供一个检测器，用于从传输路径中的每一个提取分别分配给转发器的频率信号分量中的至少一个，以提供检测到的输出，以及脉冲发生装置， 检测输出以产生预定的公共测试图案脉冲串，用于将光信号施加到每个传输路径中的每一个的相应中继器的输入部分。 从每个传输路径的信号发送站顺序地发送包括分别分配给每个传输路径的顺序布置的PCM再生中继器的频率信号分量的中继器识别信号。 基于由信号发送站通过其他传输路径接收的测试图案脉冲串的接收结果，监视其中每个传输路径中的故障。
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