公开(公告)号：US07978319B2

公开(公告)日：2011-07-12

申请号：US12002762

申请日：2007-12-19

申请人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

发明人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

IPC分类号： G01N21/00 ,  G01J4/00 ,  H04B10/00

CPC分类号： H04J14/08 ,  G01J4/04 ,  G01R13/347 ,  G02F1/3519 ,  H04B10/0775 ,  H04J14/06 ,  H04Q11/0005 ,  H04Q2011/0035 ,  H04Q2011/0039 ,  H04Q2213/1301

摘要： In a method and an optical switch by which a signal light is accurately switched even if a polarization state of a signal light inputted has a fluctuation, power of an output light of a polarizer which receives a signal light extracted from an output light of a nonlinear optical medium is monitored and a polarization state of an input signal light to the nonlinear optical medium is controlled so that the power becomes minimum (or maximum). The polarization state of the input signal light is monitored, a calculation of performing a predetermined conversion is executed to the polarization state of the input signal light, and a calculated polarization state is recorded (or recorded without conversion). A polarization state of a control light with respect to the input signal light is monitored and the polarization state of the control light is controlled so as to coincide with the polarization state of the input signal light recorded.

摘要翻译： 在即使输入的信号光的偏振状态具有波动的情况下信号光被精确地切换的方法和光开关中，也可以接收从非线性的输出光中提取的信号光的偏振器的输出光的功率 监视光学介质，并且控制对非线性光学介质的输入信号光的偏振状态，使得功率变为最小（或最大）。 监视输入信号光的偏振状态，对输入信号光的偏振状态执行预定转换的计算，计算出的偏振状态被记录（或不进行转换记录）。 监视控制光相对于输入信号光的偏振状态，并控制控制光的偏振状态，以便与记录的输入信号光的偏振态一致。

公开(公告)号：US07397975B2

公开(公告)日：2008-07-08

申请号：US11627423

申请日：2007-01-26

申请人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami ,  Shunsuke Ono

发明人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami ,  Shunsuke Ono

IPC分类号： G02F1/295 ,  G02B6/24 ,  G02B6/00

CPC分类号： G02F1/3536 ,  G02F1/365 ,  G02F2201/17 ,  G02F2201/34

摘要： Reflection means such as a mirror are provided on the output end of an optical fiber, and the input signal light and control light are returned to the optical fiber. Although the zero-dispersion wavelength of the optical fiber fluctuates in the longitudinal direction, if the length is relatively short, it is possible to manufacture a high yield of optical fibers, which monotonically changes the zero-dispersion wavelength. Therefore, a relatively short optical fiber with a monotonic zero-dispersion change can be used. Since the zero-dispersion change is monotonic and the optical fiber is short, the amount of change in the zero-dispersion wavelength is small and the bandwidth becomes broader when the control light is set at the position of the average zero-dispersion wavelength. Additionally, although the length of the optical fiber is short, the operating length is twice as long and thus the generation efficiency does not degrade.

摘要翻译： 在光纤的输出端设置反射镜等反射装置，输入信号光和控制光返回到光纤。 虽然光纤的零色散波长在长度方向上波动，但是如果长度相对较短，则可以制造高产率的光纤，其单调地改变零色散波长。 因此，可以使用具有单调零色散变化的相对短的光纤。 由于零色散变化是单调的并且光纤短，所以当色散波长的平均值位于控制光时，零色散波长的变化量小，带宽变宽。 此外，虽然光纤的长度短，但是操作长度是两倍长，因此发电效率不降低。

公开(公告)号：US07953322B2

公开(公告)日：2011-05-31

申请号：US11987576

申请日：2007-11-30

申请人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

发明人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

IPC分类号： H04J14/00

CPC分类号： H04Q11/0005 ,  G02F1/0126 ,  H04J14/06 ,  H04J14/08 ,  H04Q2011/0035 ,  H04Q2011/0039 ,  H04Q2011/0041

摘要： According to an aspect of embodiment, an optical switch comprises a signal light input unit, a control light input unit, a first polarization controller, a second polarization controller, a coupler, a nonlinear medium, a monitor and a controller.The first polarization controller controls a polarization of a signal light. The second polarization controller controls a polarization of a control light. The nonlinear medium generates an intensity correlation signal. The monitor monitors a polarization state of light outputted from the nonlinear medium. The controller controls the first polarization controller and the second polarization controller on the basis of the polarization of the signal light and the polarization of the control light.

摘要翻译： 根据实施例的一个方面，光开关包括信号光输入单元，控制光输入单元，第一偏振控制器，第二偏振控制器，耦合器，非线性介质，监视器和控制器。 第一偏振控制器控制信号光的偏振。 第二偏振控制器控制控制光的偏振。 非线性介质产生强度相关信号。 监视器监视从非线性介质输出的光的偏振状态。 控制器基于信号光的偏振和控制光的偏振来控制第一偏振控制器和第二偏振控制器。

公开(公告)号：US07518711B2

公开(公告)日：2009-04-14

申请号：US11477538

申请日：2006-06-30

申请人： Fumio Futami ,  Shigeki Watanabe ,  Shunsuke Ono ,  Ryou Okabe

发明人： Fumio Futami ,  Shigeki Watanabe ,  Shunsuke Ono ,  Ryou Okabe

IPC分类号： G01N21/00

CPC分类号： G01J9/04 ,  G01J11/00 ,  H04B10/07

摘要： A first polarization controller controls a polarization state of measured light. A second polarization controller controls a polarization state of an optical sampling pulse. The measured light and the optical sampling pulse having the polarization states controlled are input to an optical fiber. An optical signal output from the optical fiber is transmitted to a polarizer. A first control unit adjusts the first polarization controller based on the measured light output from the optical fiber and the measured light output from the polarizer. A second control unit adjusts the second polarization controller based on an optical sampling pulse output from the optical fiber. Waveform measurement is performed by using the output of the polarizer.

摘要翻译： 第一偏振控制器控制测量光的偏振状态。 第二偏振控制器控制光采样脉冲的偏振状态。 测量的光和具有受控的偏振态的光采样脉冲输入到光纤。 从光纤输出的光信号被传输到偏振器。 第一控制单元基于来自光纤的测量光输出和从偏振器输出的测量光来调节第一偏振控制器。 第二控制单元基于从光纤输出的光采样脉冲来调整第二偏振控制器。 通过使用偏振器的输出来进行波形测量。

公开(公告)号：US20080151244A1

公开(公告)日：2008-06-26

申请号：US12002762

申请日：2007-12-19

申请人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

发明人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

IPC分类号： G01J4/00

CPC分类号： H04J14/08 ,  G01J4/04 ,  G01R13/347 ,  G02F1/3519 ,  H04B10/0775 ,  H04J14/06 ,  H04Q11/0005 ,  H04Q2011/0035 ,  H04Q2011/0039 ,  H04Q2213/1301

摘要： In a method and an optical switch by which a signal light is accurately switched even if a polarization state of a signal light inputted has a fluctuation, power of an output light of a polarizer which receives a signal light extracted from an output light of a nonlinear optical medium is monitored and a polarization state of an input signal light to the nonlinear optical medium is controlled so that the power becomes minimum (or maximum). The polarization state of the input signal light is monitored, a calculation of performing a predetermined conversion is executed to the polarization state of the input signal light, and a calculated polarization state is recorded (or recorded without conversion). A polarization state of a control light with respect to the input signal light is monitored and the polarization state of the control light is controlled so as to coincide with the polarization state of the input signal light recorded.

摘要翻译： 在即使输入的信号光的偏振状态具有波动的情况下信号光被精确地切换的方法和光开关中，也可以接收从非线性的输出光中提取的信号光的偏振器的输出光的功率 监视光学介质，并且控制对非线性光学介质的输入信号光的偏振状态，使得功率变为最小（或最大）。 监视输入信号光的偏振状态，对输入信号光的偏振状态执行预定转换的计算，计算出的偏振状态被记录（或不进行转换记录）。 监视控制光相对于输入信号光的偏振状态，并控制控制光的偏振状态，以便与记录的输入信号光的偏振态一致。

公开(公告)号：US20100221014A1

公开(公告)日：2010-09-02

申请号：US12696847

申请日：2010-01-29

申请人： Shigeki WATANABE ,  Fumio Futami ,  Ryou Okabe

发明人： Shigeki WATANABE ,  Fumio Futami ,  Ryou Okabe

IPC分类号： H04B10/12 ,  H04J14/02

CPC分类号： H04B10/299

摘要： An optical fiber transmission system including: a first transmission-line optical fiber to input first wavelength signal light output from a transmitter, and to change a waveform of the signal light; an optical coupler to combine the first wavelength signal light that has been propagated through the first transmission-line optical fiber with second wavelength pumping light; an optical limiter to input coupled light output from the optical coupler, saturating a gain as power of the coupled light increases using a nonlinear optical medium, thereby suppressing an optical noise component included in the coupled light, and to output signal light including the first wavelength optical component obtained from the nonlinear optical medium; and a second transmission-line optical fiber to input to a receiver after signal light output from the optical limiter is input and a waveform change by the first transmission-line optical fiber in the signal light is compensated for.

摘要翻译： 一种光纤传输系统，包括：第一传输线光纤，用于输入从发射机输出的第一波长信号光，并改变信号光的波形; 将通过第一传输线光纤传播的第一波长信号光与第二波长泵浦光组合的光耦合器; 用于输入从光耦合器输出的耦合光的光限制器，使用非线性光学介质使耦合光的功率增加的增益饱和，由此抑制耦合光中包括的光噪声分量，并输出包括第一波长的信号光 从非线性光学介质获得的光学部件; 以及输入从光限制器输出的信号光之后输入到接收器的第二传输线光纤，并补偿信号光中的第一传输线光纤的波形变化。

公开(公告)号：US20080131137A1

公开(公告)日：2008-06-05

申请号：US11987576

申请日：2007-11-30

申请人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

发明人： Ryou Okabe ,  Shigeki Watanabe ,  Fumio Futami

IPC分类号： H04B10/00

CPC分类号： H04Q11/0005 ,  G02F1/0126 ,  H04J14/06 ,  H04J14/08 ,  H04Q2011/0035 ,  H04Q2011/0039 ,  H04Q2011/0041

摘要： According to an aspect of embodiment, an optical switch comprises a signal light input unit, a control light input unit, a first polarization controller, a second polarization controller, a coupler, a nonlinear medium, a monitor and a controller.The first polarization controller controls a polarization of a signal light. The second polarization controller controls a polarization of a control light. The nonlinear medium generates an intensity correlation signal. The monitor monitors a polarization state of light outputted from the nonlinear medium. The controller controls the first polarization controller and the second polarization controller on the basis of the polarization of the signal light and the polarization of the control light.

摘要翻译： 根据实施例的一个方面，光开关包括信号光输入单元，控制光输入单元，第一偏振控制器，第二偏振控制器，耦合器，非线性介质，监视器和控制器。 第一偏振控制器控制信号光的偏振。 第二偏振控制器控制控制光的偏振。 非线性介质产生强度相关信号。 监视器监视从非线性介质输出的光的偏振状态。 控制器基于信号光的偏振和控制光的偏振来控制第一偏振控制器和第二偏振控制器。

公开(公告)号：US20070292070A1

公开(公告)日：2007-12-20

申请号：US11627423

申请日：2007-01-26

申请人： Ryou OKABE ,  Shigeki Watanabe ,  Fumio Futami ,  Shunsuke Ono

发明人： Ryou OKABE ,  Shigeki Watanabe ,  Fumio Futami ,  Shunsuke Ono

IPC分类号： G02B6/00

CPC分类号： G02F1/3536 ,  G02F1/365 ,  G02F2201/17 ,  G02F2201/34

摘要： Reflection means such as a mirror are provided on the output end of an optical fiber, and the input signal light and control light are returned to the optical fiber. Although the zero-dispersion wavelength of the optical fiber fluctuates in the longitudinal direction, if the length is relatively short, it is possible to manufacture a high yield of optical fibers, which monotonically changes the zero-dispersion wavelength. Therefore, a relatively short optical fiber with a monotonic zero-dispersion change can be used. Since the zero-dispersion change is monotonic and the optical fiber is short, the amount of change in the zero-dispersion wavelength is small and the bandwidth becomes broader when the control light is set at the position of the average zero-dispersion wavelength. Additionally, although the length of the optical fiber is short, the operating length is twice as long and thus the generation efficiency does not degrade.

摘要翻译： 在光纤的输出端设置反射镜等反射装置，输入信号光和控制光返回到光纤。 虽然光纤的零色散波长在长度方向上波动，但是如果长度相对较短，则可以制造高产率的光纤，其单调地改变零色散波长。 因此，可以使用具有单调零色散变化的相对短的光纤。 由于零色散变化是单调的并且光纤短，所以当色散波长的平均值位于控制光时，零色散波长的变化量小，带宽变宽。 此外，虽然光纤的长度短，但是操作长度是两倍长，因此发电效率不降低。

公开(公告)号：US20070211252A1

公开(公告)日：2007-09-13

申请号：US11477538

申请日：2006-06-30

申请人： Fumio Futami ,  Shigeki Watanabe ,  Shunsuke Ono ,  Ryou Okabe

发明人： Fumio Futami ,  Shigeki Watanabe ,  Shunsuke Ono ,  Ryou Okabe

IPC分类号： G01J4/00

CPC分类号： G01J9/04 ,  G01J11/00 ,  H04B10/07

摘要： A first polarization controller controls a polarization state of measured light. A second polarization controller controls a polarization state of an optical sampling pulse. The measured light and the optical sampling pulse having the polarization states controlled are input to an optical fiber. An optical signal output from the optical fiber is transmitted to a polarizer. A first control unit adjusts the first polarization controller based on the measured light output from the optical fiber and the measured light output from the polarizer. A second control unit adjusts the second polarization controller based on an optical sampling pulse output from the optical fiber. Waveform measurement is performed by using the output of the polarizer.

摘要翻译： 第一偏振控制器控制测量光的偏振状态。 第二偏振控制器控制光采样脉冲的偏振状态。 测量的光和具有受控的偏振态的光采样脉冲输入到光纤。 从光纤输出的光信号被传输到偏振器。 第一控制单元基于来自光纤的测量光输出和从偏振器输出的测量光来调节第一偏振控制器。 第二控制单元基于从光纤输出的光采样脉冲来调整第二偏振控制器。 通过使用偏振器的输出来进行波形测量。

公开(公告)号：US08190032B2

公开(公告)日：2012-05-29

申请号：US12340177

申请日：2008-12-19

申请人： Fumio Futami ,  Shigeki Watanabe

发明人： Fumio Futami ,  Shigeki Watanabe

IPC分类号： H04B10/00

CPC分类号： H04J14/08 ,  H04B10/29

摘要： An O/E conversion element converts an input NRZ optical signal into an electric signal. A clock recovery circuit recovers a clock signal from the electric signal obtained by the O/E conversion element. A phase modulator applies phase modulation to the NRZ optical signal, using the recovered clock signal. An intensity modulator applies intensity modulation to the NRZ optical signal, using the recovered clock signal. A dispersion medium compensates for a frequency chirp of an optical signal output from the intensity modulator.

摘要翻译： O / E转换元件将输入NRZ光信号转换为电信号。 时钟恢复电路从O / E转换元件获得的电信号中恢复时钟信号。 相位调制器使用恢复的时钟信号向NRZ光信号施加相位调制。 强度调制器使用恢复的时钟信号向NRZ光信号施加强度调制。 分散介质补偿从强度调制器输出的光信号的频率啁啾。