公开(公告)号：US20080165412A1

公开(公告)日：2008-07-10

申请号：US11785494

申请日：2007-04-18

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： H04B10/12

CPC分类号： G02F1/395 ,  G02F1/3536 ,  G02F2001/392 ,  G02F2203/06 ,  H04B10/2912

摘要： In an optical parametric amplifier of the invention, pumping light which is amplified using a practical optical amplifier such as an EDFA is supplied together with signal light having a wavelength outside the amplification band of the optical amplifier, to a nonlinear optical medium via a multiplexer, to thereby amplify the signal light by an optical parametric amplification effect due to the pumping light in the nonlinear optical medium. As a result, the amplification band of a practical optical amplifier such as an EDFA, can be extended, and the noise characteristics can be improved.

摘要翻译： 在本发明的光学参量放大器中，使用诸如EDFA的实际光学放大器放大的泵浦光与具有光放大器的放大频带外的波长的信号光一起通过多路复用器提供给非线性光学介质， 从而由于非线性光学介质中的泵浦光而通过光学参量放大效应来放大信号光。 结果，可以扩展诸如EDFA的实际光放大器的放大频带，并且可以提高噪声特性。

公开(公告)号：US07379637B2

公开(公告)日：2008-05-27

申请号：US11012115

申请日：2004-12-16

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： G02B6/42

CPC分类号： H04B10/25133 ,  H04B10/2531

摘要： The present invention relates to a method for optical fiber transmission which can increase a transmission distance. A first optical fiber having dispersion is first provided. An optical signal is next supplied to the first optical fiber so that the optical signal is compressed on the time axis as propagating in the first optical fiber. In the case that the dispersion is normal dispersion, for example, prechirping is performed so that the optical signal has down-chirp. A compressed optical signal output from the first optical fiber is supplied to an optical device having a saturated gain. According to this method, the transmission distance can be increased by the effective combination of compression of the optical signal and waveform shaping by the optical device.

摘要翻译： 本发明涉及一种可以增加传输距离的光纤传输方法。 首先提供具有分散体的第一光纤。 光信号随后被提供给第一光纤，使得光信号在时间轴上被压缩以在第一光纤中传播。 在分散是正常色散的情况下，例如，进行预先激励，使得光信号具有下啁啾。 从第一光纤输出的压缩光信号被提供给具有饱和增益的光学装置。 根据该方法，可以通过光信号的压缩和光学装置的波形整形的有效组合来提高传输距离。

公开(公告)号：US20070230518A1

公开(公告)日：2007-10-04

申请号：US11520727

申请日：2006-09-14

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： H01S3/10

CPC分类号： H04B10/299

摘要： An optical signal and pump light are input to a nonlinear optical medium. In the nonlinear optical medium, the optical signal is amplified with a nonlinear effect caused by the pump light. A monitor circuit monitors parametric gain in the nonlinear optical medium. A first power controller increases input power of the optical signal so that the gain reaches saturation. A second power controller controls input power of the pump light so as to obtain a desired gain.

摘要翻译： 光信号和泵浦光被输入到非线性光学介质。 在非线性光学介质中，光信号由泵浦光引起的非线性效应被放大。 监视器电路监视非线性光学介质中的参数增益。 第一功率控制器增加光信号的输入功率，使得增益达到饱和。 第二功率控制器控制泵浦光的输入功率以获得期望的增益。

公开(公告)号：US20060051100A1

公开(公告)日：2006-03-09

申请号：US11216213

申请日：2005-09-01

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： H04B10/00

CPC分类号： H04J14/08 ,  G01J11/00 ,  G02F1/3515 ,  G02F1/39 ,  H04B10/07953

摘要： The polarization direction of an optical signal is changed by a polarization controller so as to be orthogonal to a main axis of a polarizer. A control pulse generator generates control pulses from control beam with a wavelength which is different from the wavelength of the optical signal. The optical signal and the control pulse are input to a nonlinear optical fiber. In the nonlinear optical fiber, the optical signal, during a time period in which the optical signal and the control pulse coincide, is amplified with optical parametric amplification around a polarization direction of the control pulse. The optical signal, during the time period in which the optical signal and the control pulse coincide, passes through the polarizer.

摘要翻译： 光信号的偏振方向由偏振控制器改变为与偏振器的主轴正交。 控制脉冲发生器从与光信号的波长不同的波长产生来自控制光束的控制脉冲。 光信号和控制脉冲输入到非线性光纤。 在非线性光纤中，在光信号和控制脉冲重合的时间段期间，光信号在控制脉冲的偏振方向附近被光参量放大放大。 在光信号和控制脉冲重合的时间段期间，光信号通过偏振器。

公开(公告)号：US20060018006A1

公开(公告)日：2006-01-26

申请号：US10995320

申请日：2004-11-24

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： G02F1/365

CPC分类号： G01J11/00

摘要： A measured optical pulse and a sampling optical pulse having different wavelengths are input to a nonlinear optical effect, that is, (i) a nonlinear optical medium generating four optical wave mixing or three optical wave mixing, and the optical intensity of the wavelength converted light generated by the four optical wave mixing or four optical wave mixing generated in a common portion in time of the two optical pulses is detected, thereby observing the waveform of a measured light, or (ii) a nonlinear optical medium generating mutual phase modulation which generates mutual phase modulation, and the optical intensity of converted light switched using a phase shift by mutual phase modulation generated in a common portion in time is detected, thereby observing the waveform of measured light.

摘要翻译： 将具有不同波长的测量光脉冲和采样光脉冲输入到非线性光学效应，即（i）产生四个光波混合或三个光波混合的非线性光学介质，以及波长转换光的光强度 检测在两个光脉冲的公共部分中产生的四个光波混合或四个光波混合产生的光，从而观察测量的光的波形，或者（ii）产生相位调制的非线性光学介质， 检测相互相位调制，通过在公共部分中产生的相位调制使用相移开关的转换光的光强度，从而观察被测光的波形。

公开(公告)号：US20050185965A1

公开(公告)日：2005-08-25

申请号：US11057365

申请日：2005-02-15

申请人： Shigeki Watanabe ,  Masataka Nakazawa

发明人： Shigeki Watanabe ,  Masataka Nakazawa

IPC分类号： G02F1/05 ,  G02F1/35 ,  G02F3/00 ,  H04B10/25 ,  H04B10/29 ,  H04B10/508 ,  H04B10/516 ,  H04B10/548 ,  H04B10/58 ,  H04B10/61 ,  H04B10/00

CPC分类号： H04B10/25137

摘要： The phase modulation in which the frequency chirp becomes 0 at the timing which the user wants to synchronize, and the frequency chirp becomes larger as the time deviates in a positive or negative direction from this timing is applied to the signal light with each wavelength comprising pulse train of different timing. Thus, the optical pulses which deviate from the timing which the user wants to synchronize receive the frequency chirp in accordance with the amount of the timing deviation. The WDM signal light which has been chirped in this way is made to pass a linear dispersive medium, and the dispersion fit for the amount of frequency chirp is made to be given. By adjusting the amount of dispersion, it is possible to obtain the pulses which conform to the timing at which the user wants to synchronize the pulses of each wavelength.

摘要翻译： 在用户想要同步的定时，频率啁啾变为0的相位调制，并且随着从该定时向正或负方向偏离的时间，频率啁啾变大，对每个波长包括脉冲的信号光 不同时间的火车 因此，偏离用户想要同步的定时的光脉冲根据定时偏差量接收频率啁啾声。 已经以这种方式啁啾的WDM信号光通过线性色散介质，并且给出了频率啁啾量的色散配合。 通过调整色散量，可以获得符合用户想要使每个波长的脉冲同步的定时的脉冲。

公开(公告)号：US06893082B2

公开(公告)日：2005-05-17

申请号：US10743650

申请日：2003-12-22

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： B62D25/20 ,  B62D21/09 ,  B62D21/11 ,  B62D25/08

CPC分类号： B62D25/088

摘要： A vehicle suspension mounting structure capable of sufficiently improving the strength and rigidity of a strut fixing part, while minimizing adverse effects such as increased vehicle weight. Side members of a sectional shape having an upper opening are curved inward in the vehicle width direction so as not to interfere with strut mounting faces. Notched portions are formed to extend from the strut mounting faces to outer side faces of the side members, and brackets made of a thick plate to which upper portions of struts are fixed are disposed in the notched portion and spot welded thereto.

摘要翻译： 一种能够充分提高支柱固定部件的强度和刚度的车辆悬架安装结构，同时尽量减少诸如增加车辆重量的不利影响。 具有上开口的截面形状的侧构件在车宽方向上向内弯曲，从而不会干扰支柱安装面。 形成从支柱安装面向侧部件的外侧面延伸的切口部，并且，在切口部上配置由固定有支柱上部的厚板构成的支架，并点焊。

公开(公告)号：US20050099674A1

公开(公告)日：2005-05-12

申请号：US10644873

申请日：2003-08-21

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： G02F1/35 ,  G02F2/02 ,  G02B6/00

CPC分类号： H04B10/2531 ,  G02F1/3538 ,  H04B10/255

摘要： The device according to the present invention relates to phase conjugate conversion and wavelength conversion. This device includes a polarization beam splitter and a polarization maintaining fiber (PMF). The polarization beam splitter has first, second, and third ports. The first port is supplied with signal light including first and second polarization components respectively having first and second polarization planes orthogonal to each other, and with pump light. The first and second ports are coupled by the first polarization plane, and the first and third ports are coupled by the second polarization plane. The PMF has first and second ends, and has a polarization mode to be maintained between the first and second ends. The first end is optically connected to the second port so that the first polarization plane is adapted to the polarization mode, and the second end is optically connected to the third port so that the second polarization plane is adapted to the polarization mode. Converted light generated by four-wave mixing based on the signal light and the pump light in the PMF is output from the first port, so that the converted light can be taken out by an optical circulator.

公开(公告)号：US06626592B2

公开(公告)日：2003-09-30

申请号：US10004789

申请日：2001-12-07

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： H04B1012

CPC分类号： H04B10/255 ,  G02F1/3538 ,  H04B10/2531

摘要： An optical communication system which uses optical phase conjugation to compensate for chromatic dispersion and optical Kerr effect. The optical communication system includes a first fiber, a phase conjugator, and a second fiber. The first fiber transmits a light signal therethrough, and is a polarization maintaining fiber. The light signal is a linear polarized wave. The phase conjugator receives the light signal from the first fiber and produces a corresponding phase conjugate light signal. The second fiber receives the phase conjugate light signal from the phase conjugator and transmits the phase conjugate light signal therethrough. A wavelength division multiplexing optical communication system is also provided which uses optical phase conjugation to compensate for dispersion and optical Kerr effect.

摘要翻译： 一种使用光相位共轭补偿色散和光克尔效应的光通信系统。 光通信系统包括第一光纤，相位共轭器和第二光纤。 第一光纤透过光信号，并且是保偏光纤。 光信号是线偏振波。 相位共轭器从第一光纤接收光信号并产生相应的相位共轭光信号。 第二光纤从相位共轭器接收相位共轭光信号，并透过相位共轭光信号。 还提供了一种波分复用光通信系统，其使用光相位共轭来补偿色散和光克尔效应。

公开(公告)号：US06307984B1

公开(公告)日：2001-10-23

申请号：US09051788

申请日：1998-04-20

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： G02B626

CPC分类号： H04B10/2531 ,  H04B10/2543 ,  H04B10/2563

摘要： An optical fiber communication system according to the present invention has, for example, first and second phase conjugators. The first phase conjugator converts a signal beam from a first optical fiber into a first phase conjugate beam. The first phase conjugate beam is supplied to the second phase conjugator by a second optical fiber. The second phase conjugator converts the first phase conjugate beam into a second phase conjugate beam. The second phase conjugate beam is transmitted by a third optical fiber. The second optical fiber is composed of a first portion located between the first phase conjugator and a system midpoint and a second portion located between the system midpoint and the second phase conjugator. The total dispersion of the first optical fiber substantially coincides with the total dispersion of the first portion, and the total dispersion of the second portion substantially coincides with the total dispersion of the third optical fiber. By the construction, waveform distortion by chromatic dispersion or nonlinearity is compensated for.