公开(公告)号：US07006769B1

公开(公告)日：2006-02-28

申请号：US09256079

申请日：1999-02-24

申请人： Yumiko Kawasaki ,  Kazuo Yamane ,  Takashi Tsuda ,  Satoru Okano

发明人： Yumiko Kawasaki ,  Kazuo Yamane ,  Takashi Tsuda ,  Satoru Okano

IPC分类号： H04B10/00 ,  H04B10/12

CPC分类号： H04B10/2525 ,  G02F1/0121 ,  G02F1/0123 ,  G02F2203/25 ,  H04B10/0775 ,  H04B10/07953 ,  H04B10/0799 ,  H04B2210/077 ,  H04B2210/252 ,  H04B2210/254

摘要： The invention, relates to a method for optical fiber communication. An optical signal having chirping determined by a chirp parameter is output to an optical fiber transmission line. The optical signal transmitted by the optical fiber transmission line is converted into an electrical signal. A bit error of the electrical signal is detected. Then, the chirp parameter is controlled so that the bit error detected above is reduced. According to this method, the chirp parameter is controlled so that the bit error detected is reduced. Accordingly, a chirping occurring in the optical fiber transmission line can be suppressed by the chirping of the optical signal to be output to the optical fiber transmission line, thereby compensating for chromatic dispersion and nonlinearity.

摘要翻译： 本发明涉及一种光纤通信方法。 将具有由啁啾参数确定的啁啾的光信号输出到光纤传输线。 由光纤传输线传输的光信号被转换为电信号。 检测到电信号的位错误。 然后，控制啁啾参数，使得上面检测到的位错误减少。 根据该方法，控制啁啾参数，使得检测到的位错误减少。 因此，可以通过对输出到光纤传输线的光信号的线性调频来抑制在光纤传输线中发生的线性调频，从而补偿色散和非线性。

公开(公告)号：US07079771B2

公开(公告)日：2006-07-18

申请号：US10272995

申请日：2002-10-18

申请人： Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki ,  Satoru Okano

发明人： Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki ,  Satoru Okano

IPC分类号： H04J14/02 ,  H04B10/04 ,  H01S3/00

CPC分类号： H04J14/02 ,  H04B10/506 ,  H04B10/564 ,  H04B10/572

摘要： The invention provides a wavelength multiplexing transmission apparatus includes a plurality of optical signal outputting sections for outputting optical signals having different wavelengths from each other, and a wavelength multiplexing section for wavelength multiplexing the optical signals outputted from the optical signal outputting sections and sending out a resulting optical signal. Each of the optical signal outputting sections includes a transmission light source driven by an electric signal for outputting an optical signal of a predetermined wavelength, and a wavelength filter capable of passing therethrough and sending out only an optical signal of the predetermined wavelength to be outputted from the transmission light source to prevent a wavelength drift of the optical signal outputted from the transmission light source. A variation of the wavelength of the transmission light source is detected, and the transmission light source is shut down in order to prevent otherwise possible crosstalk with another channel and prevent a further influence of the same.

公开(公告)号：US06295147B1

公开(公告)日：2001-09-25

申请号：US09115914

申请日：1998-07-15

申请人： Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki ,  Satoru Okano

发明人： Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki ,  Satoru Okano

IPC分类号： H04J1402

CPC分类号： H04J14/02 ,  H04B10/506 ,  H04B10/564 ,  H04B10/572

摘要： The invention provides a wavelength multiplexing transmission apparatus includes a plurality of optical signal outputting sections for outputting optical signals having different wavelengths from each other, and a wavelength multiplexing section for wavelength multiplexing the optical signals outputted from the optical signal outputting sections and sending out a resulting optical signal. Each of the optical signal outputting sections includes a transmission light source driven by an electric signal for outputting an optical signal of a predetermined wavelength, and a wavelength filter capable of passing therethrough and sending out only an optical signal of the predetermined wavelength to be outputted from the transmission light source to prevent a wavelength drift of the optical signal outputted from the transmission light source. A variation of the wavelength of the transmission light source is detected, and the transmission light source is shut down in order to prevent otherwise possible crosstalk with another channel and prevent a further influence of the same.

摘要翻译： 本发明提供了一种波长复用传输装置，包括：多个光信号输出部分，用于输出具有不同波长的光信号;以及波长多路复用部分，用于对从光信号输出部分输出的光信号进行波长多路复用， 光信号。 每个光信号输出部分包括由用于输出预定波长的光信号的电信号驱动的透射光源和能够通过其的波长滤光器，并且仅发出预定波长的光信号以从 传输光源，以防止从传输光源输出的光信号的波长漂移。 检测发送光源的波长的变化，并且关闭发送光源，以防止与另一个信道的可能的串扰，并防止其进一步的影响。

公开(公告)号：US06288836B1

公开(公告)日：2001-09-11

申请号：US09040323

申请日：1998-03-18

申请人： Yumiko Kawasaki ,  Satoru Okano ,  Kazuo Yamane ,  Hiroshi Nishimoto ,  Takashi Tsuda

发明人： Yumiko Kawasaki ,  Satoru Okano ,  Kazuo Yamane ,  Hiroshi Nishimoto ,  Takashi Tsuda

IPC分类号： G01J328

CPC分类号： H04B10/2935 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/1301 ,  H04B10/2912 ,  H04B10/2942

摘要： The present invention relates to an optical amplifier and an optical communication system applied to WDM (wavelength division multiplexing). The optical amplifier includes an optical amplifying medium to which WDM signal light obtained by wavelength division multiplexing a plurality of optical signals having different wavelengths is supplied, a pumping unit for pumping the optical amplifying medium such that the medium gives a gain to the WDM signal light, a feedback loop for controlling the pumping unit so that the gain is maintained constant, and an optical attenuator for giving a variable attenuation to the WDM signal light. Through the structure of the present invention, it becomes possible to provide an optical amplifier which can maintain constant the optical output level per channel of WDM and can maintain the gain characteristic constant.

摘要翻译： 本发明涉及一种应用于WDM（波分复用）​​的光放大器和光通信系统。 该光放大器包括一个光放大介质，通过波分多路复用多个具有不同波长的光信号获得的WDM信号光，一个泵浦单元，用于泵浦光放大介质，使得介质给予WDM信号光增益 ，用于控制泵送单元以使增益保持恒定的反馈回路，以及用于向WDM信号光提供可变衰减的光衰减器。 通过本发明的结构，可以提供一种能够维持WDM每通道的光输出电平恒定并且可以保持增益特性恒定的光放大器。

公开(公告)号：US06496288B2

公开(公告)日：2002-12-17

申请号：US09922777

申请日：2001-08-07

申请人： Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki ,  Satoru Okano

发明人： Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki ,  Satoru Okano

IPC分类号： H04J1400

CPC分类号： H04J14/02 ,  H04B10/506 ,  H04B10/564 ,  H04B10/572

摘要： The invention provides a wavelength multiplexing transmission apparatus includes a plurality of optical signal outputting sections for outputting optical signals having different wavelengths from each other, and a wavelength multiplexing section for wavelength multiplexing the optical signals outputted from the optical signal outputting sections and sending out a resulting optical signal. Each of the optical signal outputting sections includes a transmission light source driven by an electric signal for outputting an optical signal of a predetermined wavelength, and a wavelength filter capable of passing therethrough and sending out only an optical signal of the predetermined wavelength to be outputted from the transmission light source to prevent a wavelength drift of the optical signal outputted from the transmission light source. A variation of the wavelength of the transmission light source is detected, and the transmission light source is shut down in order to prevent otherwise possible crosstalk with another channel and prevent a further influence of the same.

摘要翻译： 本发明提供了一种波长复用传输装置，包括：多个光信号输出部分，用于输出具有不同波长的光信号;以及波长多路复用部分，用于对从光信号输出部分输出的光信号进行波长多路复用， 光信号。 每个光信号输出部分包括由用于输出预定波长的光信号的电信号驱动的透射光源和能够通过其的波长滤波器，并且仅发送预定波长的光信号以从 传输光源，以防止从传输光源输出的光信号的波长漂移。 检测发送光源的波长的变化，并且关闭发送光源，以防止与另一个信道的可能的串扰，并防止其进一步的影响。

公开(公告)号：US06738584B1

公开(公告)日：2004-05-18

申请号：US09349446

申请日：1999-07-08

申请人： Takashi Tsuda ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Satoru Okano

发明人： Takashi Tsuda ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Satoru Okano

IPC分类号： H04J1402

CPC分类号： H04B10/11 ,  H04B10/2525 ,  H04B2210/252 ,  H04B2210/254

摘要： The present invention relates to a method for optical fiber communication, and a terminal device and system for use in carrying out the method, and an object of the present invention is to compensate for chromatic dispersion and nonlinearity. A device for outputting an optical signal having a variable optical power into an optical fiber transmission line is provided. The optical signal transmitted by the transmission line is converted into an electrical signal by an optical receiver. A parameter related to waveform degradation of the electrical signal is detected by a monitor unit. A control unit controls the optical power of the optical signal to be output from the device so that the waveform degradation is improved.

摘要翻译： 本发明涉及一种光纤通信方法，以及用于实施该方法的终端装置和系统，其目的在于补偿色散和非线性。 提供一种用于将具有可变光功率的光信号输出到光纤传输线中的装置。 由传输线传输的光信号由光接收机转换成电信号。 与电信号的波形劣化相关的参数由监视器单元检测。 控制单元控制要从设备输出的光信号的光功率，从而提高波形劣化。

公开(公告)号：US06449074B1

公开(公告)日：2002-09-10

申请号：US09039567

申请日：1998-03-16

申请人： Satoru Okano ,  Hiroshi Nishimoto ,  Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki

发明人： Satoru Okano ,  Hiroshi Nishimoto ,  Kazuo Yamane ,  Takashi Tsuda ,  Yumiko Kawasaki

IPC分类号： H04J1402

CPC分类号： H04B10/2942 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/506 ,  H04J14/0221

摘要： The present invention relates to an optical transmission device and an optical communication system applied to wavelength division multiplexing (WDM). The optical transmission device includes an optical multiplexer for wavelength division multiplexing a plurality of optical signals to generate WDM signal light and outputting the WDM signal light to an optical transmission line, a detecting unit for detecting a break of each optical signal according to the power of each optical signal, and a compensator for adding light having a predetermined wavelength to the WDM signal light when at least one of the optical signals is cut off. Through the structure of the present invention it becomes possible to prevent a deterioration in transmission quality in the case that the number of WDM channels is changed.

摘要翻译： 本发明涉及一种应用于波分复用（WDM）的光传输设备和光通信系统。 光传输装置包括：光复用器，用于对多个光信号进行波分复用，以产生WDM信号光并将WDM信号光输出到光传输线;检测单元，用于根据光信号的功率检测每个光信号的中断 每个光信号以及当至少一个光信号被切断时将具有预定波长的光添加到WDM信号光的补偿器。 通过本发明的结构，可以防止在WDM信道的数量改变的情况下传输质量的恶化。

公开(公告)号：US07068876B1

公开(公告)日：2006-06-27

申请号：US09432112

申请日：1999-11-02

申请人： Takashi Tsuda ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Satoru Okano

发明人： Takashi Tsuda ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Satoru Okano

IPC分类号： G02B6/28

CPC分类号： H04B10/25133

摘要： An optical fiber transmission line composed of a plurality of segments each having a length falling within a predetermined range is provided. An optical transmitter for supplying an optical signal to the transmission line is provided at one end of the transmission line. An optical receiver for receiving the optical signal from the transmission line is provided at the other end of the transmission line. An optical amplifier is provided between any two adjacent ones of the segments. A dispersion compensator is provided in association with each of the optical transmitter, the optical receiver, and the optical amplifier. The dispersion compensator provides a dispersion selected from a plurality of stepwise varying dispersions determined according to the predetermined range.

摘要翻译： 提供由长度落在预定范围内的多个段组成的光纤传输线。 在传输线的一端设置用于向传输线提供光信号的光发射机。 用于从传输线接收光信号的光接收机设置在传输线的另一端。 在任何两个相邻片段之间提供光放大器。 与每个光发射机，光接收机和光放大器相关联地提供色散补偿器。 色散补偿器提供从根据预定范围确定的多个逐步变化的色散中选出的色散。

公开(公告)号：US6038063A

公开(公告)日：2000-03-14

申请号：US40372

申请日：1998-03-18

申请人： Takashi Tsuda ,  Hiroshi Nishimoto ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Satoru Okano

发明人： Takashi Tsuda ,  Hiroshi Nishimoto ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Satoru Okano

IPC分类号： H01S3/094 ,  H01S3/06 ,  H01S3/067 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/13 ,  H01S3/131 ,  H04B10/077 ,  H04B10/079 ,  H04B10/29 ,  H04B10/296 ,  H01S3/00

CPC分类号： H04B10/2931 ,  H01S3/1301 ,  H04B10/2912 ,  H04B10/296 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/10023

摘要： An optical amplifier relates to WDM (wavelength division multiplexing). The optical amplifier includes an optical amplifying unit, an ALC (automatic output level control) circuit for controlling the unit based on the output level thereof, and AGC (automatic gain control) circuit for controlling the unit based on the input and output levels thereof. A selecting circuit alternatively selects and operates the ALC and AGC circuits in accordance with a predetermined rule. Accordingly, the inconvenience occurring in the case of performing only one of ALC and AGC can be eliminated.

摘要翻译： 光放大器涉及WDM（波分复用）​​。 光放大器包括光放大单元，用于基于其输出电平控制单元的ALC（自动输出电平控制）电路和用于基于输入和输出电平来控制该单元的AGC（自动增益控制）电路。 选择电路根据预定规则交替地选择和操作ALC和AGC电路。 因此，可以消除在仅执行ALC和AGC中的一个的情况下发生的不便。

公开(公告)号：US5680246A

公开(公告)日：1997-10-21

申请号：US412290

申请日：1995-03-28

申请人： Tsukasa Takahashi ,  Hiroyuki Itou ,  Yuji Tamura ,  Michikazu Shima ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Keisuke Imai ,  Yoshinori Ohkuma ,  Kazuhiro Suzuki ,  Yasunori Nagakubo ,  Takashi Tsuda ,  Yuji Miyaki

发明人： Tsukasa Takahashi ,  Hiroyuki Itou ,  Yuji Tamura ,  Michikazu Shima ,  Kazuo Yamane ,  Yumiko Kawasaki ,  Keisuke Imai ,  Yoshinori Ohkuma ,  Kazuhiro Suzuki ,  Yasunori Nagakubo ,  Takashi Tsuda ,  Yuji Miyaki

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  H01S3/13 ,  H01S3/131 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/29 ,  H04B10/293 ,  H04B10/564 ,  H04B10/572 ,  H01S3/00

CPC分类号： H04B10/564 ,  H01S3/1301 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/2912 ,  H04B10/2931 ,  H01S3/06754

摘要： The optical amplifier includes a doped fiber doped with a rare earth element, a pumping light source, means for introducing signal light and pumping light into the doped fiber, detection means for detecting whether or not amplified signal light is included in light outputted from the doped fiber, and means for decreasing the intensity of the pumping light when it is detected that amplified signal light is not included. It can be possible to eliminate an influence of an optical surge arising from a characteristic of the doped fiber.

摘要翻译： 光放大器包括掺杂有稀土元素的掺杂光纤，泵浦光源，用于将信号光和泵浦光引入掺杂光纤的装置，用于检测放大信号光是否包含在从掺杂光 光纤，以及当检测到不包括放大信号光时降低泵浦光强度的装置。 可以消除由掺杂光纤的特性引起的光学浪涌的影响。