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公开(公告)号：US5912750A
公开(公告)日：1999-06-15
申请号：US779780
申请日：1997-01-07
CPC分类号： H04J14/0221
摘要： Wavelength multiplexed optical signals which are input into a first optical amplifier from an optical transmission terminal device over an optical fiber are differently amplified in respective wavelengths due to unevenness of gain of the optical amplifiers and then output. By providing M-transmission optical filters having an M-type transmission characteristic to cancel gain deviation of the optical amplifiers in respective wavelengths, a flat gain characteristic can be achieved even after the optical signals are transmitted via a plurality of optical amplifiers and a plurality of M-transmission optical filters. Also, by removing ASE in a wavelength range of 1.53 .mu.m which prevents signal amplification in a wavelength range of 1.55 .mu.m, the wavelength multiplexed optical signals which are sufficiently amplified can be transmitted to an optical reception terminal device over the optical fiber.
摘要翻译： 通过光纤从光传输终端装置输入到第一光放大器中的波分复用光信号由于光放大器的增益不均匀而在各波长中不同地被放大，然后被输出。 通过提供具有M型传输特性的M传输光学滤波器来消除各个波长的光放大器的增益偏差，即使在通过多个光放大器传输光信号和多个光放大器之后，也可以获得平坦的增益特性 M型传输滤光片。 此外，通过在1.53μm的波长范围内去除ASE，防止在1.55μm的波长范围内的信号放大，可以充分放大的波长复用光信号可以通过光纤传输到光接收终端装置。
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公开(公告)号：US5926300A
公开(公告)日：1999-07-20
申请号：US797393
申请日：1997-02-10
IPC分类号： G02B27/10 , G02B6/34 , G02B27/28 , H04B10/07 , H04B10/2507 , H04B10/27 , H04B10/29 , H04J14/02
CPC分类号： G02B6/2932 , G02B6/29383 , H04J14/0201 , H04J14/0206 , H04J14/0213
摘要： The present invention is directed towards an optical ADM apparatus provided with a narrow band-pass filter which is capable of minimizing declination of the transmission characteristics. An optical transmission prohibiting element composed of an optical isolator and a fiber grating is connected in series to the downstream of a fiber grating interposed between two optical circulators. The drop light is reflected by the fiber grating and released from an output optical fiber of the optical circulator. A leak component of the drop light having passed through the fiber grating appears on the side of the isolator and runs across the isolator to the other fiber grating. Most of the leak component is however reflected by the fiber grating while its small portion enters the optical circulator via the fiber grating. The small portion of the leak component is as small as negligible and will hardly interfere with the add light. The optical transmission prohibiting element may be an optical circulator.
摘要翻译： 本发明涉及一种具有窄带通滤波器的光学ADM装置，其能够最小化传输特性的偏差。 由光隔离器和光纤光栅构成的光传输禁止元件串联连接到插入在两个光循环器之间的光纤光栅的下游。 该光束由光纤光栅反射并从光环行器的输出光纤中释放。 穿过光纤光栅的液滴光的泄漏分量出现在隔离器的侧面，并穿过隔离器到另一个光纤光栅。 然而，大多数泄漏分量反射光纤光栅，而其小部分通过光纤光栅进入光环行器。 泄漏部件的一小部分可以忽略不计，几乎不会妨碍加光。 光传输禁止元件可以是光循环器。
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3.发明授权Method and device for optical add/drop multiplexing using high speed polarization scrambler 失效使用高速极化扰频器进行光分插复用的方法和装置
公开(公告)号：US5920413A
公开(公告)日：1999-07-06
申请号：US833097
申请日：1997-04-04
IPC分类号： G02B27/28 , G02B6/293 , H04B10/07 , H04B10/2507 , H04B10/27 , H04B10/29 , H04J14/00 , H04J14/02
CPC分类号： H04J14/0201 , H04J14/0206
摘要： An optical add/drop multiplexing scheme capable of reducing the degradation of the transmission characteristic due to the beat noises caused by the interference of the fiber grating leakage components. An optical add/drop multiplexing device is formed by a high speed polarization scrambler for entering signal lights with a data modulation at a high speed bit rate applied thereto, and scrambling polarization states of entered signal lights at high speed, and an optical add/drop element for receiving the signal lights with the polarization states scrambled by the high speed polarization scrambler, and carrying out an add/drop multiplexing operation for signal lights in a specific wavelength among received signal lights. The high speed polarization scrambler scrambles the polarization states of the entered signal lights so as to lower a probability for having worst polarization states of signal lights and interference lights, by scrambling the polarization states of the entered signal lights into every possible polarization states at nearly equal probabilities.
摘要翻译： 一种能够降低由于光纤光栅泄漏部件的干扰引起的节拍噪声导致的传输特性劣化的光分插复用方案。 通过高速偏振加扰器形成光分插多路复用装置，用于以高速比特率对数据调制进入信号光，并以高速加扰输入的信号光的偏振状态，以及光分插 用于接收具有由高速偏振加扰器加扰的偏振状态的信号光的元件，并对接收到的信号光中的特定波长的信号光进行分插复用操作。 高速极化扰频器对输入的信号光的极化状态加扰，从而通过将输入的信号光的偏振状态加扰到几乎相等的每个可能的极化状态，降低具有信号光和干涉光的最差极化状态的概率 概率
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公开(公告)号：US5589969A
公开(公告)日：1996-12-31
申请号：US542058
申请日：1995-10-12
IPC分类号： H04J14/00 , H04B10/2507 , H04B10/2563 , H04J14/02
CPC分类号： H04B10/2572 , H04J14/0224
摘要： The present invention provides a wavelength division multiplexed optical fiber transmission equipment which can increase the number of channels of the WDM signal by reducing a required bandwidth of optical signals while suppressing an interference between signals caused by four-wave mixing. A WDM optical transmitting terminal comprises five or more optical transmitters and the wavelengths of optical signals from the optical transmitters are set such that the spacing between the wavelengths of two signals is re-used as the spacing between the wavelengths of other two signals separated by the above signals by two or more waves and there is no periodicity in the channel spacing s. For instance, the wavelengths of the optical signals are set as shown in FIG. 1. As the result, deterioration in the transmission characteristics of the optical signals can be effectively reduced and, at the same time, the maximum number of channels of the WDM signal can be increased. To the WDM optical transmitting terminal is added polarization state controllers for controlling the state of polarization such that the states of polarizations of adjacent signals cross each other at an output of the WDM optical transmitting terminal.
摘要翻译： 本发明提供一种波分复用光纤传输设备，其可以通过减少光信号的所需带宽，同时抑制由四波混频引起的信号之间的干扰，从而增加WDM信号的信道数。 WDM光发射终端包括五个或更多个光发射机，并且来自光发射机的光信号的波长被设置为使得两个信号的波长之间的间隔被重新使用为由其间隔开的其它两个信号的波长之间的间隔 上述信号由两个或更多个波，并且在信道间隔s中没有周期性。 例如，光信号的波长如图5所示设定。 结果，可以有效地降低光信号的传输特性的劣化，并且同时可以增加WDM信号的最大信道数。 对于WDM光发射终端，增加了用于控制极化状态的偏振状态控制器，使得相邻信号的偏振状态在WDM光发送终端的输出端彼此交叉。
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公开(公告)号：US5559910A
公开(公告)日：1996-09-24
申请号：US452028
申请日：1995-05-26
IPC分类号： G02F1/35 , H04B10/2507 , H04B10/2525 , H04B10/2563 , G02B6/28
CPC分类号： H04B10/25253 , H04B10/2563
摘要： It is the object of the present invention to optimize the degradation due to the four-wave mixing of wavelength multiplexed signals and the distortion due to the chromatic dispersion, thereby to provide a wavelength division multiplexed optical fiber transmission equipment having good transmission characteristics. A WDM transmitting terminal consists of four transmitters of channels 1 to 4, and a wavelength-division multiplexer. Further, a WDM receiving terminal consists of an equalization optical fiber, a wavelength-division demultiplexer, and four receivers of the channels 1 to 4. The WDM transmitting terminal and the WDM receiving terminal are interconnected by transmission optical fibers and an optical amplifier. The equipment is designed so that the wavelengths .lambda..sub.1, .lambda..sub.2, .lambda..sub.3 and .lambda..sub.4 of the optical signals output from the transmitters all lie on the short-wavelength side with respect to the average zero-dispersion wavelength .lambda..sub.0. This allows the distortion due to the four-wave mixing of a wavelength multiplexed signal to be reduced. The equalization optical fiber has a chromatic dispersion of a sign opposite to the chromatic dispersion of the optical fibers forming a transmitting path, thereby for compensating the chromatic dispersion of the optical signals output from the transmitters.
摘要翻译： 本发明的目的是优化由于波分复用信号的四波混频和由于色散导致的失真的劣化，从而提供具有良好传输特性的波分复用光纤传输设备。 WDM发射终端由通道1至4的四个发射器和波分复用器组成。 此外，WDM接收终端由均衡光纤，波分多路分解器，以及通道1〜4的4个接收器构成.WDM发送终端和WDM接收终端由发送光纤和光放大器互连。 设备的设计使得从发射机输出的光信号的波长λ1，λ2，λ3和λ4相对于平均零色散波长λ0位于短波长侧。这允许 由于要减少的波长复用信号的四波混频引起的失真。 均衡光纤具有与形成发送路径的光纤的色散相反的符号的色散，从而补偿从发送器输出的光信号的色散。
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公开(公告)号：US5978529A
公开(公告)日：1999-11-02
申请号：US36485
申请日：1998-03-06
IPC分类号： H04B10/2507 , H04B10/25 , H04B10/293 , H04J14/02 , G02B6/28
CPC分类号： H04B10/2935 , H04J14/0221
摘要： This invention provides the gain equalizer positioned to an optical amplifying transmission line for equalizing gains of said optical amplifying transmission line, comprising a plurality of first optical filters varying transmittance periodically in at least predetermined wavelength range, and one or more second optical filters that their transmittance peaks at a wavelength substantially coinciding to the predetermined transmittance bottom wavelength of the first optical filters and decreases in a predetermined range at both side of the predetermined transmittance bottom wavelength.
摘要翻译： 本发明提供了一种位于光放大传输线上的增益均衡器，用于均衡所述光放大传输线的增益，包括在至少预定波长范围内周期性地改变透射率的多个第一滤光器和一个或多个第二滤光器， 在与第一光学滤波器的预定透射率底部波长基本一致的波长处的峰值在预定透射率底部波长的两侧的预定范围内减小。
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7.发明授权WDM optical communication method with pre-emphasis technique and an apparatus therefor 失效具有预加重技术的WDM光通信方法及其装置
公开(公告)号：US5790289A
公开(公告)日：1998-08-04
申请号：US651218
申请日：1996-05-22
申请人： Hidenori Taga , Noriyuki Takeda , Shu Yamamoto , Shigeyuki Akiba
发明人： Hidenori Taga , Noriyuki Takeda , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J14/00 , H04B10/077 , H04B10/25 , H04B10/2507 , H04B10/294 , H04B10/54 , H04B10/564 , H04J14/02
CPC分类号： H04B10/2935 , H04J14/0221
摘要： A wavelength division multiplexed (WDM) optical communication method and apparatus uses a pre-emphasis technique to adjust the attenuation or amplification of a particular optical channel at a transmitter terminal to produce identical signal-to-noise ratios for all of the optical channels at a receiver terminal. The pre-emphasis adjustments to the transmitted signals are made on the basis of signal-to-noise ratio measurements performed at the receiver terminal. The signal-to-noise ratio values for each channel are transmitted through a facing line that is also used to transmit data along optical communication lines from the receiver terminal back to the transmitter terminal. The present invention also provides a method and apparatus for monitoring optical transmission paths for the deterioration of optical amplifier repeaters or an optical fiber. The optical signals are then adjusted to account for the location of the particular amplifier or fiber that has deteriorated.
摘要翻译： 波分多路复用（WDM）光通信方法和装置使用预加重技术来调整在发射机终端处的特定光信道的衰减或放大，以便在所有光信道处产生相同的信噪比 接收终端。 基于在接收机终端执行的信噪比测量，对发射信号进行预加重调整。 每个通道的信噪比值通过面对线传输，该对面线也用于沿着光通信线路将数据从接收机终端发送回发射机终端。 本发明还提供了一种用于监测光放大器中继器或光纤的劣化的光传输路径的方法和装置。 然后调整光信号以考虑已劣化的特定放大器或光纤的位置。
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公开(公告)号：US5822095A
公开(公告)日：1998-10-13
申请号：US702274
申请日：1996-08-23
IPC分类号： H04J14/00 , G02B6/293 , G02B6/34 , H04B10/2507 , H04B10/27 , H04B10/29 , H04J14/02 , H04L12/40 , H04Q11/00
CPC分类号： H04Q11/0003 , G02B6/29361 , G02B6/29362 , G02B6/29383 , H04J14/0206 , H04J14/0213 , H04Q2011/0009 , H04Q2011/0015 , H04Q2011/0035
摘要： An object of the present invention is to provide an optical add-drop multiplexer capable of giving improved characteristics with a simple, inexpensive arrangement which needs not a corresponding number of optical bandpass filters to the wavelength components of a light signal to be carried. The wavelength components .lambda.1 to .lambda.n of an input n-wave signal is received by an input optical fiber and transmitted through an optical circulator and an optical fiber to an optical bandpass filter which allows a specific wavelength .lambda.1 to pass but rejects the other wavelengths .lambda.2 to .lambda.n. While the rejected wavelengths .lambda.2 to .lambda.n are returned back to the optical fiber, the specific wavelength .lambda.1 runs through another optical fiber and another optical circulator and then is dropped from an output optical fiber. Meanwhile, another signal component of the wavelength .lambda.1 is added and introduced from another input optical fiber through the another optical circulator and the another optical fiber to the optical bandpass filter. Upon the added wavelength .lambda.1 having passed the optical bandpass filter and entering the optical fiber, it is mixed with the rejected wavelengths .lambda.2 to .lambda.n. A resultant sum signal of the full wavelengths .lambda.1 to .lambda.n is passed through the optical circulator and transmitted from an output optical fiber.
摘要翻译： 本发明的一个目的是提供一种光分插复用器，其能够以简单且便宜的布置提供改进的特性，其不需要相对数量的光带通滤波器到待承载的光信号的波长分量。 输入n波信号的波长分量λ1至λn由输入光纤接收，并通过光环行器和光纤传输到允许特定波长λ1通过但拒绝其他的光学带通滤波器 波长λ2到λn。 当被拒绝的波长λ2到λn返回到光纤时，特定波长λ1穿过另一个光纤和另一个光环行器，然后从输出光纤中掉落。 同时，波长λ1的另一个信号分量从另一个输入光纤通过另一光环行器和另一光纤引入光带通滤波器。 当经过光带通滤波器并进入光纤的附加波长λ1时，将其与被拒绝的波长λ2与λn混合。 全波长λ1至λn的合成和信号通过光环行器并从输出光纤传输。
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公开(公告)号：US6091538A
公开(公告)日：2000-07-18
申请号：US987433
申请日：1997-12-09
IPC分类号： H01S3/10 , H04B10/2507 , H04B10/29 , H04B10/291 , H04J14/00 , H04J14/02 , H01S3/00
CPC分类号： H04B10/294 , H04J14/0221 , H04B2210/258
摘要： An equalizing apparatus for equalizing gains of wideband wavelength-division multiplexed light and for improving the S/N ratio comprises a plurality of optical amplifyer for optically amplifying light in different wavelength groups, respectively; and multiplexer for multiplexing optically amplified light from said plurality of optically amplifying means.
摘要翻译： 用于均衡宽带波分复用光的增益并用于提高S / N比的均衡装置包括分别用于光学放大不同波长组中的光的多个光放大器; 以及用于对来自所述多个光学放大装置的光放大的光进行复用的多路复用器。
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10.发明授权公开(公告)号：US06181449B2
公开(公告)日：2001-01-30
申请号：US09032537
申请日：1998-02-27
申请人： Hidenori Taga , Kaoru Imai , Masatoshi Suzuki , Shu Yamamoto , Shigeyuki Akiba
发明人： Hidenori Taga , Kaoru Imai , Masatoshi Suzuki , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J1402
CPC分类号： H04B10/2935 , H04B10/25073 , H04B10/25133 , H04J14/0221
摘要： A wavelength division multiplexed optical processing device and an optical communication transmission path which are capable of significantly improving the transmission characteristic of wavelength division multiplexed optical signals. A wavelength division multiplexed optical processing device is formed by a first arrayed optical waveguide for demultiplexing entered wavelength division multiplexed optical signals, and outputting demultiplexed optical signals; a plurality of correction units for correcting respective optical signals demultiplexed by the first arrayed optical waveguide; and a second arrayed optical waveguide for multiplexing optical signals corrected by the correction unit, and outputting multiplexed optical signals. An optical communication transmission path is formed by an optical transmission path; and at least one wavelength division multiplexed optical processing device using an arrayed optical waveguide having a transmission wavelength characteristic with a flat top shape, which is inserted into the optical transmission path at a prescribed interval.
摘要翻译： 能够显着提高波分复用光信号的传输特性的波分复用光处理装置和光通信传输路径。 波分复用光处理装置由第一阵列光波导形成，用于对输入的波分复用光信号进行解复用，并输出解复用的光信号; 多个校正单元，用于校正由第一阵列光波导解复用的各个光信号; 以及第二阵列光波导，用于复用由所述校正单元校正的光信号，并且输出复用的光信号。 光通信传输路径由光传输路径形成; 以及使用具有平坦顶部形状的透射波长特性的排列光波导的至少一个波分复用光学处理装置，其以规定的间隔插入到光传输路径中。
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