公开(公告)号：US5642215A

公开(公告)日：1997-06-24

申请号：US521952

申请日：1995-08-31

申请人： Masatoshi Suzuki ,  Itsuro Morita ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Itsuro Morita ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  H01S3/10 ,  H04B10/2507 ,  H04B10/508 ,  H04B10/524 ,  H04B10/58 ,  H04B10/00

CPC分类号： H04B10/25077

摘要： An optical transmission system which permits long-distance, ultrafast, high-capacity optical soliton transmission by suppressing timing jitter with simple means. In an optical transmission system which uses a transmission line composed of an optical fiber for transmitting therethrough a lightwave signal having digital information added to a return-to-zero lightwave pulse and a plurality of optical amplifying repeaters for compensating for losses by the optical fiber and in which the pulse compression effect by the nonlinear optical effect on the optical pulse and the pulse expansion effect by the dispersion effect are compensated, at least one optical band limited element which has a flat group delay characteristic near the center frequency is disposed in the transmission line at intervals of a period Z equal to the soliton period Z.sub.sol and the product, aB.sub.sol.spsb.2, of the curvature a of the product of the intensity transfer funtions of the optical band limited elements in the vicinity of the center frequency in the soliton period and the square of the full width at half maximum, B.sub.sol, of the spectrum of the lightwave pulse to be transmitted is set to a value in the range of 2.1.times.10.sup.-2 to 8.3.times.10.sup.-2.

摘要翻译： 一种光传输系统，通过简单的手段抑制定时抖动，允许长距离，超快速，高容量的光孤子传输。 在光传输系统中，使用由光纤组成的传输线通过其传输具有添加到归零光波脉冲的数字信息的光波信号和用于补偿光纤损耗的多个光放大中继器，以及 其中通过非线性光学效应对光脉冲的脉冲压缩效应和由色散效应产生的脉冲扩展效应被补偿，至少一个在中心频率附近具有平坦组延迟特性的光学带限制元件设置在透射 以等于孤子周期Zsol的周期Z的间隔和在孤子周期中的中心频率附近的光学带限制元件的强度转移功率的乘积的曲率a的乘积aBsol2，以及 要发送的光波脉冲的频谱的半峰全宽Bsol被设定为t o在2.1×10-2至8.3×10-2的范围内的值。

公开(公告)号：US5574590A

公开(公告)日：1996-11-12

申请号：US521838

申请日：1995-08-31

申请人： Noboru Edagawa ,  Masatoshi Suzuki ,  Hidenori Taga ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Noboru Edagawa ,  Masatoshi Suzuki ,  Hidenori Taga ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/29 ,  H04B10/291 ,  H04B10/508 ,  H04B10/524 ,  H04B10/58 ,  H04B10/16 ,  H04B10/12

CPC分类号： H04B10/2935 ,  H04B10/25253

摘要： An optical amplifying transmission system is disclosed in which a large quantity of optical fiber whose zero dispersion wavelength is longer than the wavelength of the lightwave signal is introduced to provide an RZ lightwave signal transmission system. In this system, the average zero dispersion wavelength by the optical fiber is shorter than the wavelength of the lightwave signal, the zero dispersion wavelength by the optical fiber whose length is in the range of one-thirds to two-thirds of the entire length of the optical fiber is longer than the wavelength of the lightwave signal, and the absolute value of the wavelength dispersion is larger than one-half the absolute value of the average wavelength dispersion value over the entire length of the optical fiber.

摘要翻译： 公开了一种光放大传输系统，其中引入了零色散波长比光波信号的波长长的大量光纤，以提供RZ光波信号传输系统。 在该系统中，光纤的平均零色散波长比光波信号的波长短，其长度为全长的三分之一到三分之二的光纤的零色散波长 光纤比光波信号的波长长，波长色散的绝对值大于光纤的整个长度上的平均波长色散值的绝对值的一半。

公开(公告)号：US5471333A

公开(公告)日：1995-11-28

申请号：US125428

申请日：1993-09-22

申请人： Hidenori Taga ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto ,  Hiroharu Wakabayashi

发明人： Hidenori Taga ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto ,  Hiroharu Wakabayashi

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。

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。

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。

公开(公告)号：US06459518B1

公开(公告)日：2002-10-01

申请号：US09329867

申请日：1999-06-11

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto

IPC分类号： H04B1000

CPC分类号： H04B10/532

摘要： A laser diode continuously laser-oscillates and its output light is applied to an optical modulator. A pulse driver drives the optical modulator according to a data to be transmitted. A phase modulator is driven by a phase modulator driver and phase-modulates the output from the optical modulator. The polarization direction of the incident light of the phase modulator is set so that the modulation efficiency of the phase modulator becomes the maximum. The output light of the phase modulator inputs a birefringent medium and applies to an optical transmission line after transmitting the birefringent medium. The principal axis of the birefringent medium is disposed so as to be at an angle of 45° to the polarization direction of the output light from the phase modulator.

摘要翻译： 激光二极管连续激光振荡，其输出光被施加到光学调制器。 脉冲驱动器根据要发送的数据驱动光调制器。 相位调制器由相位调制器驱动器驱动并对来自光调制器的输出进行相位调制。 相位调制器的入射光的偏振方向被设定为使得相位调制器的调制效率达到最大。 相位调制器的输出光输入双折射介质，并在透射双折射介质之后施加到光传输线。 双折射介质的主轴被布置成与来自相位调制器的输出光的偏振方向成45°的角度。

公开(公告)号：US5808789A

公开(公告)日：1998-09-15

申请号：US873568

申请日：1997-06-12

申请人： Noboru Edagawa ,  Hidenori Taga ,  Masatoshi Suzuki ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Noboru Edagawa ,  Hidenori Taga ,  Masatoshi Suzuki ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H01S3/10 ,  H01S3/06 ,  H04B3/04 ,  H04B10/2513 ,  H04B10/29 ,  H04B10/294 ,  H04J14/00 ,  H04J14/02 ,  G02B6/26 ,  H04B3/14

CPC分类号： H04B10/2935 ,  H04B10/2912

摘要： An optically amplifying transmission system available for wider signal bands includes an optical transmission line 42 divided into two sections 42a and 42b, optically amplifying repeaters 48a having 7 m-long erbium-doped optical fibers to repeat transmission optical fibers 46a in the section 42a, and optically amplifying repeaters 48b having 10.8 m-long erbium-doped optical fibers to repeat transmission optical fibers 46b in the section 42b. The transmission optical fibers 46a an 46b are optical fibers absolutely identical in construction and length.

摘要翻译： 可用于更宽信号频带的光放大传输系统包括分为两部分42a和42b的光传输线42，光放大具有7m长掺铒光纤的中继器48a，以重复部分42a中的传输光纤46a，以及 将具有10.8m长的掺铒光纤的光放大中继器48b重复部分42b中的传输光纤46b。 透射光纤46a，46b是结构和长度完全相同的光纤。

公开(公告)号：US5625479A

公开(公告)日：1997-04-29

申请号：US372668

申请日：1995-01-13

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/40 ,  H04B10/50 ,  H04B10/508 ,  H04B10/556 ,  H04B10/58 ,  H04B10/60 ,  H04J14/08

CPC分类号： H04B10/25077 ,  H04J14/08

摘要： An optical transmitter which reverses the ON-OFF state of the optical intensity of a bright soliton lightwave and generates a dark soliton lightwave having an optical phase shift, an optical receiver for the dark soliton lightwave, and a superfast, high-capacity optical transmission system which is capable of increasing the soliton pulse array density while suppressing timing jitter. The optical transmission system is provided with the optical transmitter which transmits a dark soliton lightwave having digital information, the optical receiver which receives the dark soliton lightwave as a return-to-zero pulse and a transmission optical fiber interconnecting the transmitter and the receiver. The system has a construction in which the transmission optical fiber has, at the wavelength of the transmission lightwave, a normal dispersion value which makes negative the average wavelength dispersion value over the entire length of the optical fiber, and the average value of the wavelength dispersion value and the optical output intensity of the transmission optical fiber have values so that a non-linear optical effect and a wavelength dispersion effect, which are exerted on the transmission lightwave, are balanced with each other.

摘要翻译： 一种光发射器，其反转明亮的孤子光波的光强度的ON-OFF状态并产生具有光学相移的暗孤子光波，用于暗孤子光波的光接收器，以及超快大容量光传输系统 其能够在抑制定时抖动的同时增加孤子脉冲阵列密度。 光传输系统设置有发射具有数字信息的暗孤子光波的光发射机，接收暗孤子光波作为归零脉冲的光接收机和互连发射机和接收机的传输光纤。 该系统具有这样的结构，其中传输光纤在传输光波长的波长处具有在光纤的整个长度上使平均波长色散值为负的正常色散值，并且波长色散的平均值 值和发射光纤的光输出强度具有使得施加在透射光波上的非线性光学效应和波长色散效应彼此平衡的值。

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。

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。