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26 条记录 (耗时 0.021 秒)

    Method and apparatus for wavelength conversion
    1.
    发明授权
    Method and apparatus for wavelength conversion 失效
    用于波长转换的方法和装置

    公开(公告)号：US06831775B2

    公开(公告)日：2004-12-14

    申请号：US10053231

    申请日：2002-01-17

    申请人： Shunichi Matsushita ,  Osamu Aso ,  Misao Sakano

    发明人： Shunichi Matsushita ,  Osamu Aso ,  Misao Sakano

    IPC分类号： G02F202

    CPC分类号： H01S5/50 ,  G02F1/3536 ,  G02F2/004 ,  H01S5/041 ,  H01S5/5054 ,  H04B10/2563 ,  H04B10/29

    摘要： A wavelength converting method and apparatus which converts wavelength division multiplexed (WDM) signal light, having a plurality of channels, by four-wave mixing the WDM signal light with at least one pump lightwave. Wavelength conversion of the WDM signal is accomplished without producing noise by FWM the WDM signal with a pump lightwave, wherein the pump lightwave frequency is separated from the WDM signal by an interval equal to or greater than the bandwidth of the WDM signal. Two pump lightwaves can be used instead of one, wherein one of the pump lightwaves has a frequency on one side of the bandwidth of the WDM signal, and the average frequency of the two pump lightwaves is on the other side of the WDM signal bandwidth.

    摘要翻译： 一种波长转换方法和装置，其通过将WDM信号光与至少一个泵浦光波进行四波混频来转换具有多个通道的波分复用（WDM）信号光。 WDM信号的波长转换通过FWM产生具有泵浦光波的WDM信号的噪声，其中泵浦光波频率与WDM信号分离等于或大于WDM信号的带宽的间隔。 可以使用两个泵浦波，而不是一个泵浦光波，其中一个泵浦光波在WDM信号的带宽的一侧具有频率，并且两个泵浦光波的平均频率在WDM信号带宽的另一侧。

    Optical pulse generator
    2.
    发明授权
    Optical pulse generator 有权
    光脉冲发生器

    公开(公告)号：US06920263B2

    公开(公告)日：2005-07-19

    申请号：US10056925

    申请日：2002-01-24

    申请人： Masateru Tadakuma ,  Osamu Aso ,  Shunichi Matsushita ,  Misao Sakano ,  Shu Namiki

    发明人： Masateru Tadakuma ,  Osamu Aso ,  Shunichi Matsushita ,  Misao Sakano ,  Shu Namiki

    IPC分类号： G02F1/365 ,  G02F1/35 ,  G02B6/26

    CPC分类号： G02F1/3519 ,  G02F2203/26 ,  H04B10/508

    摘要： An optical pulse generator comprises a comb-like dispersion profiled fiber formed into an optical loop mirror. The fiber may comprise three or more segments of fiber having alternating highly dispersive and highly nonlinear characteristics. The optical loop mirror construction splits an input pulse into two portions that propagate through the CDPF in opposite directions. The pulse portions are re-combined, and a compressed pulse with reduced noise is produced.

    摘要翻译： 光脉冲发生器包括形成光环路镜的梳状分散型纤维。 纤维可以包括具有交替的高度分散和高度非线性特性的三个或更多个纤维段。 光环路镜结构将输入脉冲分成两部分，它们以相反的方向传播通过CDPF。 脉冲部分被重新组合，并且产生具有降低的噪声的压缩脉冲。

    System for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber
    3.
    发明申请
    System for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber 有权
    用于测量光纤的波长色散和非线性系数的系统

    公开(公告)号：US20070035722A1

    公开(公告)日：2007-02-15

    申请号：US11580473

    申请日：2006-10-13

    申请人： Masateru Tadakuma ,  Yu Mimura ,  Misao Sakano ,  Osamu Aso ,  Takeshi Nakajima ,  Katsutoshi Takahashi

    发明人： Masateru Tadakuma ,  Yu Mimura ,  Misao Sakano ,  Osamu Aso ,  Takeshi Nakajima ,  Katsutoshi Takahashi

    IPC分类号： G01N21/00

    CPC分类号： G01M11/3172 ,  G01M11/31 ,  G01M11/3181 ,  G01M11/319 ,  G01M11/39

    摘要： A method of simultaneously specifying the wavelength dispersion and nonlinear coefficient of an optical fiber. Pulsed probe light and pulsed pump light are first caused to enter an optical fiber to be measured. Then, the power oscillation of the back-scattered light of the probe light or idler light generated within the optical fiber is measured. Next, the instantaneous frequency of the measured power oscillation is obtained, and the dependency of the instantaneous frequency relative to the power oscillation of the pump light in a longitudinal direction of the optical fiber is obtained. Thereafter, a rate of change in the longitudinal direction between phase-mismatching conditions and nonlinear coefficient of the optical fiber is obtained from the dependency of the instantaneous frequency. And based on the rate of change, the longitudinal wavelength-dispersion distribution and longitudinal nonlinear-coefficient distribution of the optical fiber are simultaneously specified.

    摘要翻译： 一种同时指定光纤的波长色散和非线性系数的方法。 首先引入脉冲探头光和脉冲泵浦光，进入要测量的光纤。 然后，测量在光纤内产生的探测光或空载光的背散射光的功率振荡。 接下来，获得测量的功率振荡的瞬时频率，并且获得瞬时频率相对于光纤在纵向方向上的功率振荡的依赖性。 此后，根据瞬时频率的依赖性，获得相位不匹配条件和光纤的非线性系数之间的纵向变化率。 并且基于变化率，同时规定了光纤的纵向波长色散分布和纵向非线性系数分布。

    System for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber
    5.
    发明授权
    System for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber 有权
    用于测量光纤的波长色散和非线性系数的系统

    公开(公告)号：US07424191B2

    公开(公告)日：2008-09-09

    申请号：US11580473

    申请日：2006-10-13

    申请人： Masateru Tadakuma ,  Yu Mimura ,  Misao Sakano ,  Osamu Aso ,  Takeshi Nakajima ,  Katsutoshi Takahashi

    发明人： Masateru Tadakuma ,  Yu Mimura ,  Misao Sakano ,  Osamu Aso ,  Takeshi Nakajima ,  Katsutoshi Takahashi

    IPC分类号： G02B6/00 ,  H04B10/08 ,  H04B17/00 ,  G01N21/00

    CPC分类号： G01M11/3172 ,  G01M11/31 ,  G01M11/3181 ,  G01M11/319 ,  G01M11/39

    摘要： A method of simultaneously specifying the wavelength dispersion and nonlinear coefficient of an optical fiber. Pulsed probe light and pulsed pump light are first caused to enter an optical fiber to be measured. Then, the power oscillation of the back-scattered light of the probe light or idler light generated within the optical fiber is measured. Next, the instantaneous frequency of the measured power oscillation is obtained, and the dependency of the instantaneous frequency relative to the power oscillation of the pump light in a longitudinal direction of the optical fiber is obtained. Thereafter, a rate of change in the longitudinal direction between phase-mismatching conditions and nonlinear coefficient of the optical fiber is obtained from the dependency of the instantaneous frequency. And based on the rate of change, the longitudinal wavelength-dispersion distribution and longitudinal nonlinear-coefficient distribution of the optical fiber are simultaneously specified.

    摘要翻译： 一种同时指定光纤的波长色散和非线性系数的方法。 首先引入脉冲探头光和脉冲泵浦光，进入要测量的光纤。 然后，测量在光纤内产生的探测光或空载光的背散射光的功率振荡。 接下来，获得测量的功率振荡的瞬时频率，并且获得瞬时频率相对于光纤在纵向方向上的功率振荡的依赖性。 此后，根据瞬时频率的依赖性，获得相位不匹配条件和光纤的非线性系数之间的纵向变化率。 并且基于变化率，同时规定了光纤的纵向波长色散分布和纵向非线性系数分布。

    Multi-frequency light source
    7.
    发明授权
    Multi-frequency light source 失效
    多频光源

    公开(公告)号：US07408701B2

    公开(公告)日：2008-08-05

    申请号：US11407141

    申请日：2006-04-20

    申请人： Osamu Aso ,  Shunichi Matushita ,  Misao Sakano ,  Masateru Tadakuma

    发明人： Osamu Aso ,  Shunichi Matushita ,  Misao Sakano ,  Masateru Tadakuma

    IPC分类号： G02F1/35 ,  G02F1/39 ,  H04J14/02

    CPC分类号： G02F1/3536 ,  G02F2/004 ,  G02F2201/16 ,  G02F2203/58 ,  H01S5/041 ,  H01S5/50 ,  H01S5/5054 ,  H04B10/29 ,  H04B10/505 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02

    摘要： A multi-frequency light producing method and apparatus multiplies the number of optical channels present in an incident wavelength division multiplexed (WDM) signal light source by four-wave mixing (FWM) the WDM signal with at least one pump lightwave at least one time. By FWM the WDM light and a pump lightwave multiple times, wherein each FWM process is executed with a pump lightwave having a different frequency, either in series or parallel, the number of optical channels produced as a result of FWM effectively increases the number of optical channels present in addition to those from the WDM signal. The light producing method and apparatus can be employed in a telecommunications system as a an inexpensive light source producing a plurality of optical frequencies.

    摘要翻译： 多频光产生方法和装置通过四波混频（FWM）将入射波分复用（WDM）信号光源中存在的光通道的数量与至少一个泵浦光波至少一次相乘。 通过FWM WDM光和泵浦光波多次，其中每个FWM处理都是以具有不同频率的泵浦光波串联或并联执行的，由FWM产生的光通道数量有效地增加了光学数 除了来自WDM信号的信道之外还存在通道。 该光产生方法和装置可以用在电信系统中，作为产生多个光频率的廉价光源。

    SYSTEM FOR MEASURING THE WAVELENGTH DISPERSION AND NONLINEAR COEFFICIENT OF AN OPTICAL FIBER
    9.
    发明申请
    SYSTEM FOR MEASURING THE WAVELENGTH DISPERSION AND NONLINEAR COEFFICIENT OF AN OPTICAL FIBER 有权
    用于测量光纤的波长分散度和非线性系数的系统

    公开(公告)号：US20080225276A1

    公开(公告)日：2008-09-18

    申请号：US12029626

    申请日：2008-02-12

    申请人： Masateru Tadakuma ,  Yu Mimura ,  Misao Sakano ,  Osamu Aso ,  Takeshi Nakajima ,  Katsutoshi Takahashi

    发明人： Masateru Tadakuma ,  Yu Mimura ,  Misao Sakano ,  Osamu Aso ,  Takeshi Nakajima ,  Katsutoshi Takahashi

    IPC分类号： G01N21/00

    CPC分类号： G01M11/3172 ,  G01M11/31 ,  G01M11/3181 ,  G01M11/319 ,  G01M11/39

    摘要： A method of simultaneously specifying the wavelength dispersion and nonlinear coefficient of an optical fiber. Pulsed probe light and pulsed pump light are first caused to enter an optical fiber to be measured. Then, the power oscillation of the back-scattered light of the probe light or idler light generated within the optical fiber is measured. Next, the instantaneous frequency of the measured power oscillation is obtained, and the dependency of the instantaneous frequency relative to the power oscillation of the pump light in a longitudinal direction of the optical fiber is obtained. Thereafter, a rate of change in the longitudinal direction between phase-mismatching conditions and nonlinear coefficient of the optical fiber is obtained from the dependency of the instantaneous frequency. And based on the rate of change, the longitudinal wavelength-dispersion distribution and longitudinal nonlinear-coefficient distribution of the optical fiber are simultaneously specified.

    摘要翻译： 一种同时指定光纤的波长色散和非线性系数的方法。 首先引入脉冲探头光和脉冲泵浦光，进入要测量的光纤。 然后，测量在光纤内产生的探测光或空载光的背散射光的功率振荡。 接下来，获得测量的功率振荡的瞬时频率，并且获得瞬时频率相对于光纤在纵向方向上的功率振荡的依赖性。 此后，根据瞬时频率的依赖性，获得相位不匹配条件和光纤的非线性系数之间的纵向变化率。 并且基于变化率，同时规定了光纤的纵向波长色散分布和纵向非线性系数分布。