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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：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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13.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：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：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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16.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：US5539557A
公开(公告)日：1996-07-23
申请号：US343528
申请日：1994-11-17
IPC分类号： H04J14/00 , H04B10/07 , H04B10/077 , H04B10/2507 , H04B10/29 , H04J14/04 , H04J14/06 , H04B10/08
CPC分类号： H04B10/0777 , H04B2210/074 , H04B2210/078
摘要： At the time of receiving a repeater supervisory signal superimposed on or combined by wavelength multiplexing with a main optical signal in an optical amplifier repeater system, the received optical signal is subjected to a photoelectric conversion by a photodetector and then branched into two electric signals, the one of which is subjected to equalizing amplification, timing extraction and discrimination and regeneration to extract only the main signal component. The main signal component thus extracted and the main signal contained in the other electric signal, which is not regenerated, are respectively subjected to required equalization, delay adjustment and amplitude adjustment so that they match with one another in waveform, phase and amplitude. In addition, the amplitude adjustment of the main signal is automatically controlled. By differentially combining these signals to remove only the main signal component to minimize its residual value, thereby extracting the supervisory signal to be obtained.
摘要翻译： PCT No.PCT / JP94 / 00653 Sec。 371日期：1994年11月17日 102（e）1994年11月17日PCT PCT 1994年4月20日PCT公布。 公开号WO94 / 24779 日期1994年10月27日在光学放大器中继器系统中接收到与主光信号叠加或组合在一起的中继器监视信号的时间，接收的光信号经受光电检测器的光电转换，然后分支成 两个电信号，其中一个经受均衡放大，定时提取和鉴别和再生以仅提取主信号分量。 如此提取的主信号分量和未再生的另一电信号中所包含的主信号分别经受所需的均衡，延迟调整和振幅调整，使得它们在波形，相位和幅度上彼此匹配。 另外，主信号的幅度调整也被自动控制。 通过差分地组合这些信号以仅去除主信号分量以最小化其残留值，从而提取要获得的监控信号。
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公开(公告)号：US4408831A
公开(公告)日：1983-10-11
申请号：US295311
申请日：1981-08-24
IPC分类号： G02B6/35 , G02B26/08 , H04B10/00 , H04B10/032 , H04B10/077 , H04B10/079 , H04B10/27 , G05D25/00
CPC分类号： G02B6/3512 , G02B26/08 , H04B10/032 , G02B6/3546 , G02B6/3572 , G02B6/358 , G02B6/3598
摘要： An optical switch for switching laser beams, having a transparent glass plate with a reflection film on the surface of the same has been found. When the reflection film is at the first position, the first input beam is coupled with the output beam through the transparent glass plate, while the second input beam is prevented by said reflection film. When the reflection film is at the second position, the first input beam is prevented by said reflection film, and the second input beam is coupled with the output beam through the reflection by said reflection film. Thus, according to the displacement of the transparent glass plate together with the reflection film, the input beams are switched. Due to the above operational principle, the output optical level does not decrease even during the transient time, and then, the present optical switch is utilized in an optical repeater for digital communication.
摘要翻译： 已经发现了用于切换激光束的光学开关，其具有在其表面上具有反射膜的透明玻璃板。 当反射膜处于第一位置时，第一输入光束通过透明玻璃板与输出光束耦合，而第二输入光束被所述反射膜阻止。 当反射膜位于第二位置时，通过所述反射膜防止第一输入光束，并且第二输入光束通过所述反射膜的反射与输出光束耦合。 因此，根据透明玻璃板与反射膜的位移，切换输入光束。 由于上述操作原理，即使在瞬态时间期间，输出光电位也不会降低，然后将本光开关用于用于数字通信的光中继器。
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19.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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