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：US06768872B1

公开(公告)日：2004-07-27

申请号：US09670003

申请日：2000-09-25

申请人： Takehiro Tsuritani ,  Keiji Tanaka ,  Noboru Edagawa ,  Masatoshi Suzuki

发明人： Takehiro Tsuritani ,  Keiji Tanaka ,  Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： H04J1402

CPC分类号： H04B10/25253

摘要： An optical transmitter outputs WDM signal lights comprising signal lights with 100 wavelengths of 10 Gbit/s, onto an optical transmission fiber. In the optical transmission line, a transmission fiber and a local area dispersion compensation fiber are disposed per repeater span defined by an optical amplification repeater, the local area dispersion compensation fiber is for compensating the average chromatic dispersion in the repeater span to become 2 ps/nm/km as well as a dispersion slope to become zero, and a wide area dispersion compensation fiber for compensating the average chromatic dispersion to become −0.2 ps/nm/km as well as the dispersion slope to become zero is disposed per predetermined number of optical repeater spans. The optical transmission fiber comprises a single mode optical fiber with large core diameter having a zero dispersion wavelength at a 1.3 &mgr;m band and plus chromatic dispersion at a signal wavelength band (a 1.55 &mgr;m band). The optical amplification repeater comprises an erbium-doped optical fiber to be pumped by a 0.98 &mgr;m band pumping light.

摘要翻译： 光发射机将包含10兆比特/秒波长的信号光的WDM信号灯输出到光传输光纤上。 在光传输线路中，在由光放大中继器限定的每个中继器跨度上布置传输光纤和局部色散补偿光纤，局部色散补偿光纤用于将中继器跨度中的平均色散补偿为2ps / nm / km以及色散斜率为零，并且将用于将平均色散补偿为-0.2ps / nm / km以及将色散斜率补偿为零的广域色散补偿光纤设置为每个预定数量的 光中继器。 光传输光纤包括在1.3mum波段处具有零色散波长的大芯径的单模光纤，并且在信号波长带（1.55μm波段）处加上色散。 光放大中继器包括一个掺铒光纤，通过0.98 mum带激发光泵浦。

公开(公告)号：US06748178B2

公开(公告)日：2004-06-08

申请号：US09795245

申请日：2001-02-26

申请人： Takayuki Miyakawa ,  Masatoshi Suzuki ,  Noboru Edagawa

发明人： Takayuki Miyakawa ,  Masatoshi Suzuki ,  Noboru Edagawa

IPC分类号： H04B1018

CPC分类号： H04B10/2916 ,  H04B2210/003

摘要： An optical fiber (12a) with a large effective core area and a large chromatic dispersion value is disposed on an input side of signal light, and an optical fiber (12b) with a small effective core area and a small chromatic dispersion value or a chromatic dispersion value of negative polarity is disposed on an output side of the signal light. A pumping light source (14) generates pumping light of 1450 nm to cause Raman amplification of 1550 nm in the optical fiber (12b). The output light from the pumping light source (14) enters the optical fiber (12b) from the back through a WDM optical coupler (16). Provided that y=(Pin−&agr;)/(Pp·10 Log L) where input power of the optical fiber (12a) (i.e. output power of an optical transmitter (10)) is Pin, a total loss of the optical fibers (12a and 12b) is &agr;, pumping power for Raman amplification is Pp, and a total length of the optical fibers (12a and 12b) is L, the relation between ratio x (0≦x≦1) of the optical fiber (12b) and y is expressed as y=6.63×10−2x−0.077. Here, the satisfactory x value is in a range from +0.2 to −0.2 of the y value.

摘要翻译： 具有大的有效核​​心面积和大的色散值的光纤（12a）被布置在信号光的输入侧，并且具有小的有效核心区域和小的色散值或色度的光纤（12b） 负极性的色散值被设置在信号光的输出侧。 泵浦光源（14）产生1450nm的泵浦光，以在光纤（12b）中引起1550nm的拉曼放大。 来自泵浦光源（14）的输出光通过WDM光耦合器（16）从后面进入光纤（12b）。 假设光纤（12a）的输入功率（即，光发射器（10）的输出功率））为Pin的y =（Pin-alpha）/（Pp.10Log L），光纤的总损耗 12a和12b）为α，用于拉曼放大的泵送功率为Pp，光纤（12a和12b）的总长度为L，光纤的比例x（0 <= x <= 1） 12b），y表示为y = 6.63×10 -2 x-0.077。 这里，满意的x值在y值的+0.2〜-0.2的范围内。

公开(公告)号：US06728437B2

公开(公告)日：2004-04-27

申请号：US09882352

申请日：2001-06-15

申请人： Noboru Edagawa ,  Masatoshi Suzuki

发明人： Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： G02B626

CPC分类号： H01S3/09415 ,  H01S3/09408 ,  H01S3/302

摘要： An object of the present invention is to prevent an increase of the degree of polarization of an output pumping light even if one of pumping light sources has a failure. Laser diodes (30a, 30b) are composed of FP-LDs made of InGaAsP to laser-oscillate at 1480 nm band. The outputs from the laser diodes (30a, 30b) enter a polarizing beam splitter (32) in orthogonal state of polarization and are combined there. The combined light by the polarizing beam splitter (32) enters a depolarizing element (34) and is depolarized there.

摘要翻译： 本发明的一个目的是防止输出泵浦光的偏振度的增加，即使其中一个泵浦光源有故障。 激光二极管（30a，30b）由由InGaAsP制成的FP-LD组成，以1480nm波段激光振荡。 来自激光二极管（30a，30b）的输出以正交偏振态进入偏振光束分离器（32）并在其中组合。 由偏振分束器（32）组合的光进入去极化元件（34），并在那里去极化。

公开(公告)号：US5892608A

公开(公告)日：1999-04-06

申请号：US770455

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 ,  H04B10/06

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：US06867908B2

公开(公告)日：2005-03-15

申请号：US10401748

申请日：2003-03-31

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： H03F3/08 ,  H04B3/36 ,  H04B10/03 ,  H04B10/079 ,  H04B10/29 ,  H04B10/293 ,  H04B10/80 ,  H01S3/00

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.

摘要翻译： 根据本发明的光放大器被构造成使得通过电流检测装置首先检测馈送到馈电线2a的电流量，然后对每个旁路电路22和23产生设置信号 根据这样检测到的馈电电流量，然后分别由旁路电路22和23控制每个光中继器电路11和12的输出电平，使得这些中继器电路11和12的输出电平 可以根据馈送到馈电线2a的电流量进行控制。

公开(公告)号：US06754420B2

公开(公告)日：2004-06-22

申请号：US10056999

申请日：2002-01-25

申请人： Takehiro Tsuritani ,  Keiji Tanaka ,  Noboru Edagawa ,  Masatoshi Suzuki

发明人： Takehiro Tsuritani ,  Keiji Tanaka ,  Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： G02B602

CPC分类号： H04B10/2525

摘要： An optical fiber transmission line for realizing satisfactory long haul transmission characteristics using two kinds of optical fibers. The optical fiber transmission line includes a plurality of local dispersion compensating spans, wide dispersion compensating spans disposed at predetermined intervals, and optical repeating amplifiers to connect each span. The local dispersion compensating span includes a first optical fiber with positive dispersion having an effective core area of 130 &mgr;m2 or more and a second optical fiber with a negative dispersion value of −50 ps/nm/km or less to transmit the light output from the first optical fiber. The wide dispersion compensating span consists of a third optical fiber having the same configuration and composition with the first optical fiber.

摘要翻译： 一种用于使用两种光纤实现令人满意的长距离传输特性的光纤传输线。 光纤传输线包括多个局部色散补偿范围，以预定间隔设置的宽色散补偿跨度以及连接每个跨度的光学重复放大器。 局部色散补偿范围包括具有130μm或更大的有效核​​心面积的正色散的第一光纤和具有-50ps / nm / km或更小的负色散值的第二光纤传输光 从第一光纤输出。 宽色散补偿范围由具有与第一光纤具有相同配置和组成的第三光纤组成。

公开(公告)号：US06744990B1

公开(公告)日：2004-06-01

申请号：US09434679

申请日：1999-11-05

申请人： Masatoshi Suzuki ,  Noriyuki Takeda ,  Noboru Edagawa ,  Hideaki Tanaka ,  Shinichi Nakagawa ,  Hidenori Taga ,  Koji Goto

发明人： Masatoshi Suzuki ,  Noriyuki Takeda ,  Noboru Edagawa ,  Hideaki Tanaka ,  Shinichi Nakagawa ,  Hidenori Taga ,  Koji Goto

IPC分类号： H04B1012

CPC分类号： H04B10/2935 ,  H04B10/25253 ,  H04J14/0221

摘要： An object of the present invention is to realize almost the same transmission characteristic in all wavelengths at a transmission rate of 10 Gb/s or more. An optical transmitter 10 outputs WDM signal light multiplexed with signal light of a plurality of wavelengths toward an optical transmission line 12. The optical transmission line 12 comprises an optical transmission fiber 14, an optical repeating amplifier 16 and a dispersion compensating fiber 18. The gain characteristic of the optical repeating amplifier 16 is set so that the gain becomes the maximum at the effective zero dispersion wavelength of the optical transmission line 12 and that lowers inversely proportional to the distance from the effective zero dispersion wavelength. The whole optical transmission line 12 is set so that the peak power deviation between the effective zero dispersion wavelength &lgr;0 and the wavelength &lgr;1 or &lgr;n on both end becomes approximately 4 dB.

摘要翻译： 本发明的目的是以10Gb / s以上的传输速率实现所有波长的几乎相同的传输特性。 光发送器10将与多个波长的信号光复用的WDM信号光输出到光传输线12.光传输线12包括光传输光纤14，光中继放大器16和色散补偿光纤18.增益 光学重复放大器16的特性被设置为使得增益在光传输线路12的有效零色散波长处变为最大值，并且降低与距有效零色散波长的距离成反比。 整个光传输线路12被设置为使得有效零色散波长λ0和两端的波长λ1或兰博丹之间的峰值功率偏差变为大约4dB。

公开(公告)号：US06594428B1

公开(公告)日：2003-07-15

申请号：US09520481

申请日：2000-03-08

申请人： Keiji Tanaka ,  Takehiro Tsuritani ,  Noboru Edagawa ,  Masatoshi Suzuki

发明人： Keiji Tanaka ,  Takehiro Tsuritani ,  Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： G02B616

CPC分类号： H04B10/25253

摘要： A dispersion compensating optical transmission line comprises a plurality of optical transmission fibers for transmitting signal light, at least one first dispersion compensator disposed at a first dispersion compensating cycle for compensating an accumulated chromatic dispersion of the signal light so that an average chromatic dispersion is equal to a first desired value, and a plurality of second dispersion compensators disposed at a second dispersion compensating cycle shorter than the first dispersion compensating cycle for compensating the accumulated chromatic dispersion of the signal light so that an average chromatic dispersion is equal to a second desired value which absolute value is larger than that of the first desired value.

摘要翻译： 色散补偿光传输线包括用于传输信号光的多个光传输光纤，至少一个以第一色散补偿周期布置的第一色散补偿器，用于补偿信号光的累积色散，使得平均色散等于 第一期望值，以及多个第二色散补偿器，其布置在比第一色散补偿周期短的第二色散补偿周期，用于补偿信号光的累积色散，使得平均色散等于第二期望值， 绝对值大于第一个期望值的绝对值。

公开(公告)号：US06532091B1

公开(公告)日：2003-03-11

申请号：US09246256

申请日：1999-02-08

申请人： Tetsuya Miyazaki ,  Tomohiro Otani ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto

发明人： Tetsuya Miyazaki ,  Tomohiro Otani ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto

IPC分类号： H04B1002

CPC分类号： H04B10/299

摘要： An optical digital regenerator for digitally regenerating an input signal in an intact optical state. A first operating unit has a first probe light generator for generating a first probe light and a first optical operator for converting a waveform of the first probe light output from a first probe light generator according to an optical intensity waveform of the input signal light. A clock extractor extracts a clock component of the input signal light from a photocurrent generated by the first optical operator. A second optical operating unit has a second probe light generator for generating a second probe light pulsed in accordance with the clock output from the clock extractor and a second optical operator for sampling the second probe pulse light output from the second probe light generator.

摘要翻译： 一种用于以完整光学状态数字再生输入信号的光学数字再生器。 第一操作单元具有用于产生第一探测光的第一探测光发生器和用于根据输入信号光的光强度波形转换从第一探测光发生器输出的第一探测光的波形的第一光学操作器。 时钟提取器从由第一光学运算器产生的光电流提取输入信号光的时钟分量。 第二光学操作单元具有第二探测光发生器，用于产生根据来自时钟提取器的时钟输出脉冲的第二探测光，以及第二光学操作器，用于对从第二探测光发生器输出的第二探测脉冲光进行采样。