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31. 发明授权

US6021235A Wavelength-division multiplexing optical transmission system 失效
标题翻译：波分复用光传输系统
公开(公告)号：US6021235A
公开(公告)日：2000-02-01
申请号：US127564
申请日：1998-07-31
申请人： Shu Yamamoto , Hidenori Taga , Masatoshi Suzuki , Noboru Edagawa , Shigeyuki Akiba
发明人： Shu Yamamoto , Hidenori Taga , Masatoshi Suzuki , Noboru Edagawa , Shigeyuki Akiba
IPC分类号： H04J14/00 , G02B6/02 , H04B10/2507 , H04B10/2525 , H04J14/02 , G02B6/28
CPC分类号： H04B10/2525 , H04B2210/252 , H04B2210/254
摘要： A new two-way WDM optical transmission system is provided. The WDM optical transmission system comprises a two-way optical fiber cable, a first dispersion compensation optical fiber (DCOF) connected to one end of the optical fiber cable, a second DCOF connected to another end of the optical fiber cable, a chromatic dispersion compensating transmitter unit and a chromatic dispersion compensating receiver unit. The two-way optical fiber cable comprises a plurality of segments. The first DCOF is connected to one end of the optical fiber cable and has a compensation amount of a half of a one segment dispersion D.sub.c of the optical fiber cable. The second DCOF is connected to another end of the optical fiber cable and has the compensation amount of the half of the one segment dispersion D.sub.c. And the chromatic dispersion compensating transmitter unit compensates accumulated residual chromatic dispersions to be caused by higher-order wavelength dispersion of the optical fiber cable at each signal wavelength. Further, the chromatic dispersion compensating receiver unit compensates accumulated residual chromatic dispersions caused by higher-order wavelength dispersion of the optical fiber cable at each signal wavelength. The chromatic dispersion compensating transmitter unit has a plurality of optical transmitters, a multiplexer combining a plurality of different wavelength bands and a plurality of chromatic dispersion compensators. And the chromatic dispersion compensating receiver unit has a demultiplexer, a plurality of optical receiver and a plurality of chromatic dispersion compensators.
摘要翻译：提供了一种新的双向WDM光传输系统。 WDM光传输系统包括双向光纤电缆，连接到光纤电缆的一端的第一色散补偿光纤（DCOF），连接到光纤电缆的另一端的第二DCOF，色散补偿发射单元和色散补偿接收单元。双向光缆包括多个段。第一DCOF连接到光纤电缆的一端，并且具有光纤电缆的一个分段色散Dc的补偿量的一半。第二DCOF连接到光纤电缆的另一端，并且具有一个分段分散体Dc的一半的补偿量。并且色散补偿发送单元补偿在每个信号波长处由光纤电缆的高阶波长色散引起的累积残余色散。此外，色散补偿接收单元补偿由每根信号波长的光纤缆线的高阶波长色散引起的累积的残留色散。色散补偿发射器单元具有多个光发射器，多个组合多个不同波长带的多路复用器和多个色散补偿器。并且色散补偿接收单元具有解复用器，多个光接收器和多个色散补偿器。

32. 发明授权

US6005702A Optical transmission device, WDM optical transmission apparatus, and optical transmission system using return-to-zero optical pulses 失效
标题翻译：光传输设备，WDM光传输设备和使用归零光脉冲的光传输系统
公开(公告)号：US6005702A
公开(公告)日：1999-12-21
申请号：US802698
申请日：1997-02-19
申请人： Masatoshi Suzuki , Itsuro Morita , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
发明人： Masatoshi Suzuki , Itsuro Morita , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： G02F1/01 , H04B10/2507 , H04B10/2525 , H04B10/508 , H04B10/516 , H04B10/524 , H04B10/556 , H04B10/58 , H04B10/61 , H04J14/00 , H04J14/02 , H04L25/02 , H04L25/49 , H04B10/04 , H04B10/12
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/506 , H04B10/508 , H04J14/02
摘要： An optical transmission device using return-to-zero optical pulses as transmission optical pulses, which is capable of enhancing a transmission distance as well as a wavelength range with satisfactory transmission characteristics and enabling an easy realization of the wavelength division multiplexing optical transmission. The optical transmission device is formed by an optical transmitter for transmitting transmission optical pulses by superposing digital data signals onto return-to-zero optical pulses, and a modulator for applying one of a phase modulation and a frequency modulation in synchronization with a transmission rate of the transmission optical pulses, to the transmission optical pulses transmitted by the optical transmitter. This optical transmission device can be utilized in forming a wavelength division multiplexing optical transmission apparatus and an optical transmission system.
摘要翻译：一种使用归零光脉冲作为传输光脉冲的光传输装置，其能够增强传输距离以及具有令人满意的传输特性的波长范围，并且能够容易地实现波分复用光传输。光传输装置由光发射机形成，用于通过将数字数据信号叠加在归零光脉冲上来发送传输光脉冲;以及调制器，用于将相位调制和频率调制中的一个与传输速率传输光脉冲，由光发送器传输的传输光脉冲。该光传输装置可以用于形成波分复用光传输装置和光传输系统。

33. 发明授权

US5966228A Optical transmission system and optical repeater 失效
标题翻译：光传输系统和光中继器
公开(公告)号：US5966228A
公开(公告)日：1999-10-12
申请号：US756609
申请日：1996-11-26
申请人： Shigeyuki Akiba , Shu Yamamoto , Masatoshi Suzuki , Noboru Edagawa , Hidenori Taga
发明人： Shigeyuki Akiba , Shu Yamamoto , Masatoshi Suzuki , Noboru Edagawa , Hidenori Taga
IPC分类号： G02F1/35 , G02B6/34 , H04B10/2507 , H04B10/2519 , H04B10/2525 , H04B10/29 , H04B10/291 , H04J14/00 , H04J14/02 , H04B10/18
CPC分类号： H04B10/2935 , H04B10/25253 , G02B6/29317 , G02B6/29394
摘要： An optical transmission system comprises transmission optical fibers 14 connected between an optical transmission terminal 10 and an optical receiving terminal 12 via optical amplifying repeaters 16, and equalizing fiber 18 each connected in each equalizing interval. The equalizing fiber 18 is typically located at the terminal end of each equalizing interval. Each transmission optical fiber 14 is a dispersion-shifted fiber whose wavelength dispersion is substantially zero in a specific band, for example, 1.5 .mu.m. The optical amplifying repeaters 16 include an optical amplifier, and a dispersion compensating optical element having wavelength dispersion characteristics that exhibit an inclination opposite from that of wavelength characteristics of wavelength dispersion of the transmission optical fiber 14 (more specifically, a minus inclination with respect to the wavelength). The dispersion compensating optical element compensates offset values of cumulative wavelength dispersion among different wavelengths. The dispersion compensating optical element can be made by a fiber grating technology.
摘要翻译：光传输系统包括经由光放大中继器16连接在光传输终端10和光接收终端12之间的传输光纤14，以及均衡光纤18，每个均衡间隔均连接。均衡纤维18通常位于每个均衡间隔的终端处。各透射光纤14是在特定频带例如1.5μm的波长色散基本为零的色散位移光纤。光放大中继器16包括光放大器和具有波长色散特性的色散补偿光学元件，其具有与透射光纤14的波长色散的波长特性相反的倾斜度（更具体地说，相对于波长）。色散补偿光学元件补偿不同波长之间的累积波长色散的偏移值。色散补偿光学元件可以通过光纤光栅技术制成。

34. 发明授权

US5920413A Method and device for optical add/drop multiplexing using high speed polarization scrambler 失效
标题翻译：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
申请人： Takayuki Miyakawa , Hidenori Taga , Shu Yamamoto , Shigeyuki Akiba
发明人： Takayuki Miyakawa , Hidenori Taga , Shu Yamamoto , Shigeyuki Akiba
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

35. 发明授权

US5877878A Surveillance method of optical amplifier-repeater transmission system 失效
标题翻译：光放大器 - 中继器传输系统的监控方法
公开(公告)号：US5877878A
公开(公告)日：1999-03-02
申请号：US757290
申请日：1996-11-27
申请人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
发明人： Yukio Horiuchi , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J14/00 , H04B10/035 , H04B10/07 , H04B10/077 , H04B10/2507 , H04B10/29 , H04B10/297 , H04B10/54 , H04B10/548 , H04B10/572 , H04J14/02 , H04B10/02
CPC分类号： H04B10/0777 , H04B2210/078
摘要： The purpose of the invention is to detect a surveillance signal in a shorter time without lowering the usable merit of wavelength. The transmission signal transmitting through the optical fiber transmission lines is specified as a light FDM signal multiplexed in wavelength, and the surveillance light signal is interposed in the middle of two adjacent channel slots. The surveillance light signal is produced such that the spread spectrum is applied to the surveillance carrier and thereby a light signal is modulated in intensity. The light FDM signal and surveillance light signal are turned to the facing transmission lines in the optical repeaters to be received by each terminal station, and the modulation rate of the surveillance light signal can be made deeper so that the surveillance signal can be detected in a shorter time.
摘要翻译：本发明的目的是在更短的时间内检测监视信号，而不降低波长的可用优点。通过光纤传输线传输的传输信号被指定为以波长复用的光FDM信号，并且监视光信号插入在两个相邻信道时隙的中间。产生监视光信号，使得扩频被应用于监视载体，从而强度调制光信号。光FDM信号和监视光信号转到每个终端接收的光中继器中的面向传输线，并且可以使监视光信号的调制速率更深，从而可以在时间较短

36. 发明授权

US5786918A Optical communication system and optical transmitting device 失效
标题翻译：光通信系统和光传输设备
公开(公告)号：US5786918A
公开(公告)日：1998-07-28
申请号：US575174
申请日：1995-12-19
申请人： Masatoshi Suzuki , Hidenori Taga , Noboru Edagawa , Hideaki Tanaka , Shu Yamamoto , Shigeyuki Akiba
发明人： Masatoshi Suzuki , Hidenori Taga , Noboru Edagawa , Hideaki Tanaka , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： G02F1/35 , H04B10/07 , H04B10/2507 , H04B10/2543 , H04B10/294 , H04B10/516 , H04B10/61 , H04J14/08 , H04B10/00
CPC分类号： H04B10/25077 , H04J14/08
摘要： An optical communication system of a construction wherein the average wavelength dispersion value of the transmission optical fiber used, the optical output intensity of each optical amplifier repeater inserted in the transmission optical fiber and the widths of return-to-zero optical pulses transmitted over the transmission line are determined so as to compensate for the pulse compression effect by the nonlinear optical effect produced on the optical pulses by the pulse spreading effect by the wavelength dispersion effect. An optical multiplexer in the optical transmitting device time-division multiplexes the return-to-zero optical pulses, and the optical multiplexed signal is provided as an alternating-amplitude optical signal with the amplitudes of the return-to-zero optical pulses alternated.
摘要翻译：一种结构的光通信系统，其中使用的传输光纤的平均波长色散值，插入在传输光纤中的每个光放大器中继器的光输出强度以及通过传输传输的归零光脉冲的宽度线被确定为通过由脉冲扩散效应通过波长色散效应在光脉冲上产生的非线性光学效应来补偿脉冲压缩效应。光发射装置中的光复用器对归零光脉冲进行时分复用，并且光复用信号被提供为交替振幅的光信号，并且返回到零的光脉冲的幅度交替。

37. 发明授权

US5430795A Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit 失效
标题翻译：光发射机与信号光的偏振度降低和光学去极化电路
公开(公告)号：US5430795A
公开(公告)日：1995-07-04
申请号：US58108
申请日：1993-05-06
申请人： Hidenori Taga , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba , Hiroharu Wakabayashi
发明人： Hidenori Taga , Noboru Edagawa , Shu Yamamoto , Shigeyuki Akiba , Hiroharu Wakabayashi
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。

38. 发明授权

US5401957A Optical waveform shaping device for peforming waveform equalization and timing synchronization 失效
标题翻译：用于波形均衡和定时同步的波形整形装置
公开(公告)号：US5401957A
公开(公告)日：1995-03-28
申请号：US215887
申请日：1994-03-21
申请人： Masatoshi Suzuki , Noboru Edagawa , Hideaki Tanaka , Shu Yamamoto , Yuichi Matsushima
发明人： Masatoshi Suzuki , Noboru Edagawa , Hideaki Tanaka , Shu Yamamoto , Yuichi Matsushima
IPC分类号： H01S5/06 , G02B6/12 , G02F1/015 , H04B10/07 , H04B10/2507 , H01J5/16
CPC分类号： H04B10/299
摘要： To perform waveform shaping, retiming and amplification of the transmitted pulse signal of a binary PCM fiber optic communication employing an optical pulse signal which has a pulse duty factor within 1 with respect to a time slot, an optical waveform shaping device is proposed in which the optical pulse signal is branched by an optical branch circuit into two optical signals. The one transmitted optical signal passes through a photodetector, a band-pass filter for extracting the fundamental frequency component of the signal, an amplifier and a delay circuit, so that the signal is converted to a sinusoidal voltage synchronized with the optical pulse signal. The other optical signal passes through a semiconductor electrical absorption type optical modulator which is driven by the sinusoidal voltage and a DC voltage, so that the width of a gate waveform is changed by controlling the amplitude of the sinusoidal voltage and the DC voltage.
摘要翻译：为了对采用相对于时隙的脉冲占空比为1的脉冲信号的二进制PCM光纤通信的发送脉冲信号进行波形整形，重新定时和放大，提出了一种光波形整形装置，其中光脉冲信号由光分支电路分支成两个光信号。一个发送的光信号通过光电检测器，用于提取信号的基频分量的带通滤波器，放大器和延迟电路，使得信号被转换成与光脉冲信号同步的正弦电压。另一个光信号通过由正弦电压和直流电压驱动的半导体吸电型光调制器，从而通过控制正弦电压和直流电压的幅度来改变门波形的宽度。

39. 发明授权

US5162936A Apparatus for monitoring the operation of an optical repeater 失效
标题翻译：用于监测光学重复器的操作的装置
公开(公告)号：US5162936A
公开(公告)日：1992-11-10
申请号：US655530
申请日：1991-02-14
申请人： Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Hiroharu Wakabayashi
发明人： Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Hiroharu Wakabayashi
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。

40. 发明授权

US4490020A Coupling system for output light of semiconductor laser 失效
标题翻译：半导体激光器输出光耦合系统
公开(公告)号：US4490020A
公开(公告)日：1984-12-25
申请号：US267554
申请日：1981-05-27
申请人： Haruo Sakaguchi , Norio Seki , Shu Yamamoto
发明人： Haruo Sakaguchi , Norio Seki , Shu Yamamoto
IPC分类号： G02B6/32 , G02B6/42 , G02B27/09 , H01S5/00 , G02B5/172
CPC分类号： G02B19/0009 , G02B19/0052 , G02B27/09 , G02B27/0966 , G02B6/32 , G02B6/4203 , G02B6/4204 , G02B6/4206
摘要： A coupling system for the output light of a semiconductor laser, characterized in that an end portion of an optical fiber is made as a focusing lens to be coupled with the output light from an active layer of the semiconductor laser is formed so that, at least in a plane parallel to the optical axis of the output light and perpendicular to the junction plane of the semiconductor laser, the width of the end portion continuously decreases towards its tip to provide a required curvature at the tip and that the distribution of light of the semiconductor laser and that of the optical fiber and the focusing lens are matched with each other in the plane perpendicular to the junction plane of the semiconductor laser. The end portion of the optical fiber defining the focusing lens may be formed to have a fixed width in a plane parallel to the junction plane of the semiconductor laser. The end portion of the optical fiber or focusing lens may be formed so that it has a required curvature in a plane parallel to the plane of junction of the semiconductor laser and that the distribution of light of the semiconductor laser and that of the optical fiber and focusing lens are matched with each other also in a plane parallel to the junction plane of the semiconductor laser.
摘要翻译：一种用于半导体激光器的输出光的耦合系统，其特征在于，将光纤的端部制成为与来自半导体激光器的有源层的输出光耦合的聚焦透镜，使得至少在平行于输出光的光轴并且垂直于半导体激光器的结面的平面中，端部的宽度朝向其尖端连续地减小，以在尖端处提供所需的曲率，并且，半导体激光器和光纤和聚焦透镜的半导体激光器在垂直于半导体激光器的结面的平面中彼此匹配。限定聚焦透镜的光纤的端部可以形成为在平行于半导体激光器的接合面的平面中具有固定的宽度。光纤或聚焦透镜的端部可以形成为使得其在平行于半导体激光器的结的平面的平面中具有所需的曲率，并且半导体激光器和光纤的光分布聚焦透镜在平行于半导体激光器的结面的平面中彼此匹配。

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