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。

公开(公告)号：US06285477B1

公开(公告)日：2001-09-04

申请号：US09469936

申请日：1999-12-21

申请人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

发明人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

IPC分类号： H04J1402

CPC分类号： H01S3/2383 ,  H01S3/06791 ,  H01S3/08086 ,  H04J14/02

摘要： In a light source for generating light containing multiple wavelengths substantially uniform in intensity, a wavelength demultiplexing element 10 (for example, waveguide-type wavelength selecting filter) demultiplexes input light into a plurality of wavelengths &lgr;1 through &lgr;32. Optical amplifiers 14-1 through 14-32 amplify outputs of the element 10 and applies them to input ports of a wavelength multiplexing element 12. The wavelength multiplexing element 12 wavelength-multiplexes their input. Output of the wavelength multiplexing element 12 is applied to a fiber coupler 16 which, in turn, applies one of its outputs to the wavelength demultiplexing element 10. The optical amplifiers 14 have a gain larger by approximately 10 dB than the loss in the optical loop made of the element 10, optical amplifier 14, element 12 and fiber coupler 16. The other output of the fiber coupler 16 is wavelength-multiplex light containing wavelengths &lgr;1 through &lgr;32.

摘要翻译： 在用于产生强度基本均匀的多个波长的光的光源中，波长解复用元件10（例如，波导型波长选择滤波器）将输入光分离成多个波长lambd1至lambd32。 光放大器14-1至14-32放大元件10的输出并将其施加到波长多路复用元件12的输入端口。波长复用元件12对其输入进行波长多路复用。 波长多路复用元件12的输出被施加到光纤耦合器16，光纤耦合器16又将其一个输出施加到波长解复用元件10.光放大器14具有比光环路中的损耗大约10dB的增益 由元件10，光放大器14，元件12和光纤耦合器16制成。光纤耦合器16的另一个输出是波长lambd1至lambd32的波长多路复用光。

公开(公告)号：US06219163B1

公开(公告)日：2001-04-17

申请号：US09625385

申请日：2000-07-26

申请人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

发明人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

IPC分类号： H04J1402

CPC分类号： H01S3/2383 ,  H01S3/067 ,  H01S3/06791 ,  H01S3/08086 ,  H04B2210/258 ,  H04J14/02

摘要： In a light source for generating light containing multiple wavelengths substantially uniform in intensity, a wavelength demultiplexing element 10 (for example, waveguide-type wavelength selecting filter) demultiplexes input light into a plurality of wavelengths &lgr;1 through &lgr;32. optical amplifiers 14-1 through 14-32 amplify outputs of the element 10 and applies them to input ports of a wavelength multiplexing element 12. The wavelength multiplexing element 12 wavelength-multiplexes their input. Output of the wavelength multiplexing element 12 is applied to a fiber coupler 16 which, in turn, applies one of its outputs to the wavelength demultiplexing element 10. The optical amplifiers 14 have a gain larger by approximately 10 dB than the loss in the optical loop made of the element 10, optical amplifier 14, element 12 and fiber coupler 16. The other output of the fiber coupler 16 is wavelength-multiplex light containing wavelengths &lgr;1 through &lgr;32.

摘要翻译： 在用于产生强度基本均匀的多个波长的光的光源中，波长解复用元件10（例如，波导型波长选择滤波器）将输入光分离成多个波长lambd1至lambd32。 光放大器14-1至14-32放大元件10的输出并将其施加到波长多路复用元件12的输入端口。波长复用元件12对其输入进行波长多路复用。 波长多路复用元件12的输出被施加到光纤耦合器16，光纤耦合器16又将其一个输出施加到波长解复用元件10.光放大器14具有比光环路中的损耗大约10dB的增益 由元件10，光放大器14，元件12和光纤耦合器16制成。光纤耦合器16的另一个输出是波长lambd1至lambd32的波长多路复用光。

公开(公告)号：US06331907B1

公开(公告)日：2001-12-18

申请号：US09625386

申请日：2000-07-26

申请人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

发明人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

IPC分类号： H04J1402

CPC分类号： H01S3/2383 ,  H01S3/067 ,  H01S3/06791 ,  H01S3/08086 ,  H04B2210/258 ,  H04J14/02

摘要： In a light source for generating light containing multiple wavelengths substantially uniform in intensity, a wavelength demultiplexing element 10 (for example, waveguide-type wavelength selecting filter) demultiplexes input light into a plurality of wavelengths &lgr;1 through &lgr;32. Optical amplifiers 14-1 through 14-32 amplify outputs of the element 10 and applies them to input ports of a wavelength multiplexing element 12. The wavelength multiplexing element 12 wavelength-multiplexes their input. Output of the wavelength multiplexing element 12 is applied to a fiber coupler 16 which, in turn, applies one of its outputs to the wavelength demultiplexing element 10. The optical amplifiers 14 have a gain larger by approximately 10 dB than the loss in the optical loop made of the element 10, optical amplifier 14, element 12 and fiber coupler 16. The other output of the fiber coupler 16 is wavelength-multiplex light containing wavelengths &lgr;1 through &lgr;32.

公开(公告)号：US06215566B1

公开(公告)日：2001-04-10

申请号：US09625387

申请日：2000-07-26

申请人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

发明人： Tetsuya Miyazaki ,  Noboru Edagawa ,  Shu Yamamoto

IPC分类号： H04J1406

CPC分类号： H01S3/2383 ,  H01S3/067 ,  H01S3/06791 ,  H01S3/08086 ,  H04B2210/258 ,  H04J14/02

摘要： In a light source for generating light containing multiple wavelengths substantially uniform in intensity, a wavelength demultiplexing element 10 (for example, waveguide-type wavelength selecting filter) demultiplexes input light into a plurality of wavelengths &lgr;1 through &lgr;32. Optical amplifiers 14-1 through 14-32 amplify outputs of the element 10 and applies them to input ports of a wavelength multiplexing element 12. The wavelength multiplexing element 12 wavelength-multiplexes their input. Output of the wavelength multiplexing element 12 is applied to a fiber coupler 16 which, in turn, applies one of its outputs to the wavelength demultiplexing element 10. The optical amplifiers 14 have a gain larger by approximately 10 dB than the loss in the optical loop made of the element 10, optical amplifier 14, element 12 and fiber coupler 16. The other output of the fiber coupler 16 is wavelength-multiplex light containing wavelengths &lgr;1 through &lgr;32.

公开(公告)号：US06445478B1

公开(公告)日：2002-09-03

申请号：US09764271

申请日：2001-01-19

申请人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

发明人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

IPC分类号： H04B1004

摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.

公开(公告)号：US06188510B1

公开(公告)日：2001-02-13

申请号：US09248399

申请日：1999-02-10

申请人： Noboru Edagawa ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Noboru Edagawa ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H01S300

CPC分类号： H04B10/2918

摘要： An optical amplifying transmission system comprising a first optical amplifying transmission line including a first optical amplifier, a second optical amplifying transmission line including a second optical amplifier, a pumping light generator for generating pumping lights to be supplied to said first and second amplifiers, the powers of the pumping lights being variable, and first and second terminal stations which connect respectively to both ends of said first and second optical amplifying transmission lines.

摘要翻译： 一种光放大传输系统，包括第一光放大传输线，包括第一光放大器，包括第二光放大器的第二光放大传输线，用于产生供给所述第一和第二放大器的泵浦光的泵浦光发生器， 的泵浦光是可变的，以及分别连接到所述第一和第二光放大传输线的两端的第一和第二终端站。

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：US5629795A

公开(公告)日：1997-05-13

申请号：US521973

申请日：1995-08-31

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

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

IPC分类号： H04B10/2507 ,  H04B10/2525 ,  H04B10/29 ,  H04B10/291 ,  H01S3/00 ,  H04B10/02

CPC分类号： H04B10/25253

摘要： An optical amplifying-repeating transmission system is disclosed which is composed of an optical fiber for transmitting a lightwave signal with digital information added to return-to-zero lightwave pulses and a plurality of optical amplifying repeaters inserted in the optical fiber for transmission use. The mean value of wavelengths at which the wavelength dispersion of the optical fiber is zero is smaller than the wavelength of the lightwave signal which is transmitted over the system. The accumulated wavelength dispersion value of the optical fiber tends to increase with the distance of transmission, from a macroscopic viewpoint. The optical fiber for transmission is divided into a plurality of sections. In accordance with the accumulated wavelength dispersion value of the optical fiber in each section except at least the last one, a wavelength dispersion medium, which locally changes the wavelength dispersion in a manner to cancel the accumulated wavelength dispersion in the section at the wavelength of the lightwave signal, is inserted in the section to eliminate the accumulation of the timing jitter.

摘要翻译： 公开了一种光放大重复传输系统，其由用于传输光波信号的光纤与添加到归零光波脉冲的数字信息以及插入光纤中的多个光放大中继器组成，用于传输使用。 光纤的波长色散为零的波长的平均值小于在系统上传输的光波信号的波长。 从宏观的观点来看，光纤的累积波长色散值随着透射距离而增加。 用于传输的光纤被分成多个部分。 根据除了至少最后一个部分之外的每个部分中的光纤的累积波长色散值，波长色散介质以局部改变波长色散的方式来消除在波长的波长处的部分中的累积波长色散 光波信号，插入该部分以消除定时抖动的累积。

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.