公开(公告)号：US5959764A

公开(公告)日：1999-09-28

申请号：US923349

申请日：1997-09-04

申请人： Noboru Edagawa ,  Masatoshi Suzuki ,  Shu Yamamoto

发明人： Noboru Edagawa ,  Masatoshi Suzuki ,  Shu Yamamoto

IPC分类号： G02F2/02 ,  G02F1/015 ,  G02F2/00 ,  G02F3/00 ,  H04B10/2507 ,  H04B10/29 ,  H04B10/516 ,  H04B10/54 ,  H04B10/572 ,  H04B10/58 ,  H04B10/61 ,  H04J14/08 ,  G02F1/39

CPC分类号： G02F2/004 ,  G02F2001/0157 ,  H01S5/509 ,  H04J14/08

摘要： A waveform converter includes a transmission-type InGaAsP electroabsorption optical modulator 10 using the Franz-Keldysh effect. Continuous light (probe light) 12 as a target of wavelength conversion is fed to an end surface 10a of the optical modulator 10 while a constant voltage of 3 V is applied to the optical modulator 10. An optical circulator 14 is supplied with original signal light (signal light to be waveform-converted) 16 through its terminal A, and delivers it from the terminal B thereof to another end surface 10b of the optical modulator 10. The optical modulator 10 gives a loss to the probe light 12 according to the intensity of the original signal light 16 and makes the waveform of the probe light 12 to be substantially the same as the original signal light. The probe light waveform-converted by the optical modulator 10 and output from the end surface 10b is fed to a terminal B of an optical circulator 14 as a waveform-converted light 18 and output from its terminal C.

摘要翻译： 波形转换器包括使用Franz-Keldysh效应的透射型InGaAsP电吸收光调制器10。 将作为波长转换的目标的连续光（探测光）12馈送到光调制器10的端面10a，同时将3V的恒定电压施加到光调制器10。光环行器14被提供有原始信号光 （要被波形转换的信号光）16，并将其从端子B传送到光调制器10的另一端面10b。光调制器10根据强度给探测光12带来损耗 的原始信号光16，使探测光12的波形基本上与原始信号光相同。 由光调制器10波形转换并从端面10b输出的探测光被作为波形转换光18馈送到光环行器14的端子B，并从其端子C输出。

公开(公告)号：US06614588B1

公开(公告)日：2003-09-02

申请号：US09725288

申请日：2000-11-29

申请人： Aritomo Uemura ,  Kiwami Matsushita ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Aritomo Uemura ,  Kiwami Matsushita ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H01S300

CPC分类号： H04B10/29 ,  H04B10/2918 ,  H04B10/808

摘要： The optical amplifier according to the present invention is constructed such that the amount of the electric current fed to the power feeding line 2a is first detected by the current detection means, and then a setting signal is generated to each of the bypass circuits 22 and 23 in accordance with the thus detected amount of the fed current, and thereafter the output level of each of the optical repeater circuits 11 and 12 is controlled respectively by the bypass circuits 22 and 23, so that the output level of these repeater circuits 11 and 12 can be controlled in accordance with the amount of the current fed to the power feeding line 2a.

公开(公告)号：US06519078B2

公开(公告)日：2003-02-11

申请号：US09887915

申请日：2001-06-21

申请人： Takayuki Miyakawa ,  Noboru Edagawa ,  Masatoshi Suzuki

发明人： Takayuki Miyakawa ,  Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： H01S330

CPC分类号： H01S3/302

摘要： The object of this invention is to improve SNR in the Raman amplification. An optical fiber (10) consists of a dispersion shift fiber in which a zero dispersion wavelength is shifted to the 1.55 &mgr;m band, and an optical fiber (12) consists of a single mode optical fiber having the effective core area of 100 &mgr;m2 which is larger than that of the optical fiber (10). An optical coupler 14 is disposed at the optical signal emission end of the optical fiber (12). A laser diode (16) outputs the laser light of 1455 nm as a Raman pumping light source. The output light from the laser diode (16) is introduced into the optical fiber (12) from the back, namely in the opposite direction to that of the optical signal propagation. The ratio of the Raman gain coefficient of the optical fiber (12) to that of the optical fiber (11) should be 1/1.08 or less, preferably 1/1.1 or less.

公开(公告)号：US5737110A

公开(公告)日：1998-04-07

申请号：US770454

申请日：1996-12-20

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 ,  H04B10/00

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：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：US06515793B2

公开(公告)日：2003-02-04

申请号：US09752132

申请日：2000-12-26

申请人： Noboru Edagawa ,  Masatoshi Suzuki

发明人： Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： G02F200

CPC分类号： H04B10/299

摘要： An optical waveform shaper comprising a probe light source for generating probe light with a constant amplitude, a signal copier to which input signal light of a signal wavelength and the probe light output from the probe light source is applied and which copies the signal of the input signal light onto the probe light, and an extinction ratio improver for improving the extinction ratio of output light from the signal copier is described.

摘要翻译： 一种光波形整形器，包括用于产生恒定幅度的探测光的探测光源，信号复用器，信号波长的输入信号光和从探测光源输出的探测光被施加到该信号复制器，并且复制输入的信号 信号光到探测光，并且描述了用于改善来自信号复印机的输出光的消光比的消光比改进剂。

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：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。

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。