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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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4.发明授权
公开(公告)号：US5430795A
公开(公告)日：1995-07-04
申请号：US58108
申请日：1993-05-06
IPC分类号： H04B10/25 , H04B10/532 , G02B6/00
CPC分类号： H04B10/532 , H04B10/25
摘要： An optical transmitter for providing a signal light with a reduced degree of polarization, the transmitter being used as a transmitting terminal of an optical repeater system that encompasses optical amplifiers at a signal light transmitter, the optical transmitter includes an optical source for transmitting a signal light source; and a degree of polarization reducing circuit including a polarizing beam splitter splitting the signal light source from the optical source means into a first polarized component and a second polarized component that are orthogonal to each other; a first optical path transmitting the first polarized component input from the polarizing beam splitter while maintaining the polarization plane of the first polarized component; a second optical path, which is spatially separate from the first optical path, transmitting the second polarized component input from the polarizing beam splitter while maintaining the polarization plane of the second polarized component; and a polarizing beam mixer mixing the first polarized component and the second polarized component that were transmitted over the first optical path and the second optical path, respectively; the length A1 of the first optical path and the length A2 of the second optical path satisfying the equation.vertline.A2.times.n2-A1.times.n1.vertline..gtoreq.0.22.div..DELTA.v.times.Cwhere n1 is the refractive index of the first optical path, n2 is the refractive index of the second optical path, .DELTA.v is the line width of the signal light source, and C is light velocity.
摘要翻译： 一种用于提供具有降低的偏振度的信号光的光发射机，所述发射机被用作在信号光发射机处包含光放大器的光中继器系统的发射终端，所述光发射机包括用于发射信号光的光源 资源; 以及偏振光降低电路，其包括将信号光源从光源装置分离为彼此正交的第一偏振分量和第二偏振分量的偏振分束分离器; 第一光路，其在保持所述第一偏振分量的偏振面的同时，从所述偏振分束器输入的所述第一偏振分量; 与第一光路在空间上分离的第二光路，在保持第二偏振分量的偏振面的同时透射从偏振分束器输入的第二偏振分量; 以及分别混合在第一光路和第二光路上透射的第一偏振分量和第二偏振分量的偏振光束混合器; 第一光路的长度A1和第二光路的长度A2满足方程式| A2xn2-A1xn1 |> = 0.22 DIVIDED DELTA vxC其中n1是第一光路的折射率，n2是折射率 第二光路，DELTA v是信号光源的线宽，C是光速。
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公开(公告)号：US5162936A
公开(公告)日：1992-11-10
申请号：US655530
申请日：1991-02-14
IPC分类号： H01S3/067 , H01S3/131 , H04B10/07 , H04B10/077 , H04B10/29 , H04B10/54 , H04B10/564
CPC分类号： H04B10/2931 , H04B10/0777 , H04B10/2912 , H04B10/2918 , H01S3/06754 , H01S3/10015 , H01S3/1301 , H04B2210/074
摘要： Apparatus for monitoring a plurality of optical repeaters of an optical communication system in which each said repeater directly amplifies an optical signal transmitted in an optical fiber and passing through the respective optical repeater, including an optical division circuit for dividing an outgoing main line signal and a monitoring signal, a format conversion circuit by which monitoring information is converted into binary information, a previous modulation circuit by which a monitoring signal is modulated with a sine wave, a comparison circuit which compares the monitoring signal with a reference voltage, a voltage controlled amplifier which amplifies the modulated monitoring signal, an automatic gain control circuit which regulates the output from the outgoing optical repeater, and an outgoing optical repeater which includes a stimulating light source, a wave synthesizer and a doped optical fiber.
摘要翻译： 一种用于监视光通信系统的多个光中继器的设备，其中每个所述中继器直接放大在光纤中传输的光信号并通过相应的光中继器，包括用于划分输出主线信号的光分路电路和 监视信号，将监视信息转换为二进制信息的格式转换电路，用正弦波调制监视信号的先前调制电路，将监视信号与参考电压进行比较的比较电路，压控放大器 其放大调制监视信号，调节输出光中继器的输出的自动增益控制电路和包括刺激光源，波合成器和掺杂光纤的输出光中继器。
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公开(公告)号：US5042039A
公开(公告)日：1991-08-20
申请号：US452806
申请日：1989-12-19
CPC分类号： H01S3/06708
摘要： An Er-doped optical fiber laser device adapted for pumping by light from a pumping light source in an erbium (Er)-doped optical fiber which enters a single mode at the wavelength of amplified light. In accordance with the present invention, the Er-doped optical fiber is further doped with at least one of holmium (Ho), thulium (Tm) and dysprosium (Dy). The pumping light source emits light in a 1.1 to 1.4 .mu.m band. The output light from the pumping light source and signal light incident to the Er-doped optical fiber are combined by a combining optical fiber coupler.
摘要翻译： 掺铒光纤激光器装置，适用于通过掺铒（Er）掺杂的光纤中的泵浦光源的光进行泵浦，该光纤以放大的光的波长进入单一模式。 根据本发明，铒掺杂光纤进一步掺杂有钬（Ho），ium（Tm）和镝（Dy）中的至少一种。 泵浦光源发射1.1至1.4微米波段的光。 来自泵浦光源的输出光和入射到掺铒光纤的信号光通过组合光纤耦合器组合。
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公开(公告)号：US4720162A
公开(公告)日：1988-01-19
申请号：US850453
申请日：1986-04-11
CPC分类号： G02B6/4215 , G02B6/2713 , G02B6/274 , G02B6/2773
摘要： An optical coupler is formed of at least one polarization maintaining single mode fiber, a polarizing beam splitter connected to the polarization maintaining single mode fiber, and a main optical fiber which is connected with the polarizing beam splitter at one end thereof. This optical coupler is useful as a changeover switch for a light source.
摘要翻译： 光耦合器由至少一个偏振保持单模光纤，连接到偏振保持单模光纤的偏振分束器和与其偏振分束器的一端连接的主光纤形成。 该光耦合器可用作光源的转换开关。
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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：US4320968A
公开(公告)日：1982-03-23
申请号：US131396
申请日：1980-03-18
CPC分类号： G01M11/3172
摘要： A fault location system for locating the fault point of an optical fiber transmission system has been found. The present system comprises a laser for generating an optical beam, a sweep oscillator for modulating said laser beam, a half mirror mounted between the outlet of the laser and the inlet of the optical fiber to be tested, an optical receiver for converting the optical beam reflected by the fault point to an electrical signal through said half mirror, a modulator for providing the frequency difference between the instantaneous output frequency of said sweep oscillator and the output frequency of said optical receiver, a low pass filter connected to the output of said modulator, and a spectrum analyzer connected to the output of the low pass filter. The present system has the advantage that the S/N of the system is excellent, and plural fault points can be located at the same time.
摘要翻译： 已经发现了用于定位光纤传输系统的故障点的故障定位系统。 本系统包括用于产生光束的激光器，用于调制所述激光束的扫描振荡器，安装在激光器的出口与被测光纤的入口之间的半反射镜，用于将光束 由故障点反射到通过所述半反射镜的电信号，用于提供所述扫频振荡器的瞬时输出频率与所述光接收机的输出频率之间的频率差的调制器，连接到所述调制器的输出端的低通滤波器 ，以及连接到低通滤波器的输出的频谱分析仪。 本系统的优点是系统的S / N优异，同时可以同时定位多个故障点。
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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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