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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：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：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：US4411520A
公开(公告)日：1983-10-25
申请号：US222973
申请日：1981-01-07
CPC分类号： G01N21/412 , G01J7/00
摘要： A light dispersion measuring apparatus, provided with a light source for generating reference light pulses of short duration and of a constant frequency and also variable-frequency light pulses in synchronization with the reference light pulses but at a frequency different therefrom. A variable optical delay line delays the reference light pulses. An optical transmission medium, to be detected and to which the variable-frequency light pulses are applied is provided. An optical non-linear effect element receiver the output light pulses from the variable optical delay line and the optical transmission medium and is disposed so that when the two light pulses coincide emitted from the light source with each other, the sum component of the frequencies of the two types of light pulses produces a maximum output. A photo detector detects the sum component. Light dispersion in the optical transmission medium being measured from the delay of the variable optical delay line is adjusted so that the sum components yields a maximum output with respect to the frequency of the variable-frequency light pulses. The frequency of the reference light pulses can be made to be equal to the variable-frequency of the variable-frequency light pulses.
摘要翻译： 一种光分散测量装置，设置有用于产生短持续时间的参考光脉冲和恒定频率以及与参考光脉冲同步但与其不同的频率的可变频光脉冲的光源。 可变光延迟线延迟参考光脉冲。 提供待检测并且施加可变频光脉冲的光传输介质。 光学非线性效应元件接收来自可变光学延迟线和光学传输介质的输出光脉冲，并且被布置成使得当两个光脉冲从光源发射相互重合时，频率的和分量 两种类型的光脉冲产生最大输出。 光电检测器检测和分量。 调整从可变光学延迟线的延迟测量的光传输介质中的光散射，使得和分量相对于可变频率光脉冲的频率产生最大输出。 可以使参考光脉冲的频率等于可变频率光脉冲的可变频率。
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公开(公告)号：US4304489A
公开(公告)日：1981-12-08
申请号：US144863
申请日：1980-04-29
摘要： An optical loss in a single mode optical device is measured by utilizing multi-mode equipment. The present system comprises of an optical source (1), a sample (30) to be tested, a reference optical attenuator (31) for replacing the optical loss in the sample (30), a first optical switch (40) provided between the optical source (1) and the sample (30) through a single mode optical fiber, a second optical switch (41) provided between the sample (30) and the light receiver (2) through the multi-mode optical fiber, said reference optical attenuator (31) being provided between the first optical switch (40) and the second optical switch (41) so that the optical path is switched either to the sample (30) or to the reference attenuator (31), the optical fiber between the sample (30) and the second optical switch (41) and the optical fiber connected to the input and the output of the reference attenuator (31) being a multi-mode optical fiber.
摘要翻译： 通过利用多模式设备测量单模光学装置中的光损耗。 本系统包括光源（1），待测试样品（30），用于替换样品（30）中的光损耗的参考光衰减器（31），设置在样品（30）之间的第一光开关 通过单模光纤的光源（1）和样品（30），通过多模光纤设置在样品（30）和光接收器（2）之间的第二光开关（41），所述参考光 衰减器（31）设置在第一光开关（40）和第二光开关（41）之间，使得光路切换到采样（30）或参考衰减器（31），光纤 样品（30）和第二光开关（41），连接到参考衰减器（31）的输入和输出的光纤是多模光纤。
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公开(公告)号：US4710976A
公开(公告)日：1987-12-01
申请号：US731642
申请日：1985-05-07
IPC分类号： H04B10/00 , H04B10/07 , H04B10/077 , H04B10/079 , H04B10/29 , H04B10/524 , H04B10/556 , H04B17/40 , H04L1/00 , H04L25/02 , H04B9/00
CPC分类号： H04L1/0063 , H04B17/405
摘要： An optical repeater for an optical digital transmission line has a pair of in-service monitoring circuits (55, 55') each of which includes a flip-flop (57) for dividing frequency of transmission data to derive commands and burst carrier in the first line (54). A counting means (59, 61) is provided for detecting parity errors and counting the errors in an opposite second line (65). A timing generation means (62) is provided for reading out the counting means (61) upon receipt of the burst carrier. A phase modulator (64) provides phase modulation to a clock pulse in an opposite second line (65) according to the output of the timing generation means (62). The number of errors in the second line (65) is stored in the counting means (61) according to commands in a first line (54) from a terminal transmitter (52). The content of the counting means (61) is forwarded to a terminal receiver (66) through phase modulation of clock pulses in a second line (65) upon receipt of the burst carrier. The commands and burst carrier are constituted by arranging parity bits of in-service data in the first line (54).
摘要翻译： 一种用于光数字传输线的光中继器具有一对在用监视电路（55,55'），每一个都包括用于分配传输数据的频率的触发器（57），以在第一 线（54）。 提供计数装置（59,61），用于检测奇偶错误并计数相对的第二行（65）中的错误。 提供定时产生装置（62），用于在接收到突发载波时读出计数装置（61）。 相位调制器（64）根据定时产生装置（62）的输出，向相对的第二行（65）中的时钟脉冲提供相位调制。 根据来自终端发送器（52）的第一行（54）中的命令，将第二行（65）中的错误数存储在计数装置（61）中。 计数装置（61）的内容通过在接收到突发载波时在第二行（65）中的时钟脉冲的相位调制被转发到终端接收器（66）。 命令和突发载波通过布置第一行（54）中的在役数据的奇偶校验位来构成。
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公开(公告)号：US4300239A
公开(公告)日：1981-11-10
申请号：US115236
申请日：1980-01-24
IPC分类号： H04B10/07 , G01M11/00 , H04B10/00 , H04B10/035 , H04B10/077 , H04B10/29 , H04B17/00 , H04B17/02 , H04L25/02 , H04B9/00
CPC分类号： H04B10/07 , H04B17/406
摘要： An optical repeater monitoring system for a digital signal transmission circuit utilizing an optical fiber transmission cable, in which a terminal station at the extreme end of the cable transmits the repeater recognition signal for designating the particular repeater to be tested and the test signal following immediately after said repeater recognition signal to the optical fiber transmission cable, the repeater thus designated by said repeater recognition signal composes the return optical path in the repeater by switching ON an optical switch for reflecting said repeater recognition signal and the repeater test signal to the terminal station, and the terminal station then analyzes the returned repeater test signal to determine the error rate of the digital signal in the cable.
摘要翻译： 一种用于使用光纤传输电缆的数字信号传输电路的光中继器监视系统，其中，电缆最末端的终端发送用于指定要测试的特定中继器的中继器识别信号，以及紧接在之后的测试信号 所述中继器识别信号到光纤传输电缆，由所述中继器识别信号指定的中继器通过接通用于将所述中继器识别信号和中继器测试信号反映到终端站的光开关构成中继器中的返回光路， 然后终端站分析返回的中继器测试信号，以确定电缆中数字信号的错误率。
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公开(公告)号：US4201959A
公开(公告)日：1980-05-06
申请号：US854103
申请日：1977-11-23
IPC分类号： H04B3/10
CPC分类号： H04B3/10
摘要： In a long line transmission system, the signal level at the transmission station is pre-equalized by the value L.sub.s which is adjustable according to the signal level at the receiving station. The receiving station equalizes the received signal to the standard level at the output of the receiving station. The difference between the actual level L.sub.r at the input of the receiving station and the standard level there, is fed back to the transmission station through a return transmission line, and said difference is utilized to adjust the pre-equalization value L.sub.s at the transmission station. The ratio L.sub.s /L.sub.r is controlled to be constant by the operation of the pre-equalization level distributor installed at the transmission station.
摘要翻译： 在长线路传输系统中，发送站处的信号电平被按照接收站的信号电平可调节的值Ls进行前置均衡。 接收站在接收站的输出端将接收信号均衡为标准电平。 接收站输入端的实际电平Lr与其间的标准电平之间的差异通过返回传输线路反馈到发送站，并且利用所述差值来调整发送站处的预均衡值Ls 。 通过安装在发送站的预均衡水平分配器的操作将比率Ls / Lr控制为恒定。
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公开(公告)号：US4270029A
公开(公告)日：1981-05-26
申请号：US20873
申请日：1979-03-15
CPC分类号： H04B17/406
摘要： A digital signal repeater selecting system for a digital signal transmission system equipped with a plurality of digital signal repeaters disposed on a transmission line at desired intervals, in which there are provided in each of the repeaters a delay circuit having a particular delay time corresponding to an integral multiple of the unit code length of a digital signal and assigned to the repeater and having its input terminal connected to the transmission line, and a code comparator for comparing the input signal to and the output signal from the delay circuit with each other to produce a predetermined output signal when the both signals are decided to be substantially identical with each other, and in which when a repeater selecting code train repeating in synchronism with the delay time is applied to the transmission line, the repeater to which the delay time is assigned produces the predetermined output signal from the code comparator to allow an operation of selecting the repeater. The above principle can be applied to monitor the condition of the transmission line.
摘要翻译： 一种用于数字信号传输系统的数字信号中继器选择系统，该数字信号传输系统配备有以所需间隔设置在传输线上的多个数字信号中继器，其中在每个中继器中设置延迟电路，该延迟电路具有对应于 数字信号的单位码长度的整数倍，分配给中继器并将其输入端连接到传输线;以及代码比较器，用于将输入信号与来自延迟电路的输出信号相互比较，以产生 当两个信号被确定为彼此基本相同时，预定的输出信号，并且当将与延迟时间同步的中继器选择代码序列应用于传输线时，分配了延迟时间的中继器 从代码比较器产生预定的输出信号，以允许选择重复的操作 呃 上述原理可用于监测传输线的状况。
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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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