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1. 发明申请

US20090060433A1 OPTICAL FIBER 有权
标题翻译：光纤
公开(公告)号：US20090060433A1
公开(公告)日：2009-03-05
申请号：US12197596
申请日：2008-08-25
申请人： Masateru TADAKUMA
发明人： Masateru TADAKUMA
IPC分类号： G02B6/00
CPC分类号： G02B6/03627 , C03B2201/12 , C03B2201/31 , C03B2201/32 , C03C13/046 , G02B6/0281
摘要： An optical fiber made of silica-based material includes a core and a cladding formed around the core. The core is doped with germanium dioxide, which increases refractive index and decreases acoustic-wave velocity, and aluminum oxide, which increases both refractive index and acoustic-wave velocity, satisfying −2.814+0.594×W1≦W2≦54.100+0.218×W1, W1+W2≦60, and W2≧56.63−2.04×W1, where W1 is doping amount of germanium dioxide in weight percentage, which is larger than 4.74, and W2 is doping amount of aluminum oxide in weight percentage. A nonlinear coefficient of the optical fiber is equal to or larger than 2.6×10−9W−1.
摘要翻译：由二氧化硅基材料制成的光纤包括在芯周围形成的芯和包层。核心掺杂有二氧化锗，其增加折射率并降低声波速度，并且氧化铝增加了折射率和声波速度，满足-2.814 + 0.594xW1 <= W2 <= 54.100 + 0.218xW1， W1 + W2 <= 60，W2> = 56.63〜0.04xW1，其中W1是二氧化锗的掺杂量，重量百分比大于4.74，W2是氧化铝的掺杂量。光纤的非线性系数等于或大于2.6×10-9W-1。

2. 发明申请

US20090003786A1 OPTICAL FIBER MODULE AND OPTICAL DEVICE 有权
标题翻译：光纤模块和光学设备
公开(公告)号：US20090003786A1
公开(公告)日：2009-01-01
申请号：US12203796
申请日：2008-09-03
申请人： Masanori TAKAHASHI , Jiro Hiroishi , Masateru Tadakuma , Takeshi Yagi
发明人： Masanori TAKAHASHI , Jiro Hiroishi , Masateru Tadakuma , Takeshi Yagi
IPC分类号： G02B6/02 , G02B6/00
CPC分类号： G02B6/022 , G02B6/14 , G02B6/3502 , G02B6/3552 , G02B6/3594 , G02B6/4457 , G02F1/0134 , G02F1/3536 , G02F1/365 , G02F2001/3505 , G02F2201/02
摘要： An optical fiber module includes an optical fiber that transmits a light and a holding unit that holds the optical fiber in a state in which the optical fiber is stretched in its longitudinal direction to change optical characteristics of the optical fiber.
摘要翻译：光纤模块包括在光纤沿其纵向方向拉伸的状态下传输光的光纤和保持光纤的保持单元以改变光纤的光学特性。

3. 发明授权

US07424191B2 System for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber 有权
标题翻译：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。

4. 发明申请

US20070216993A1 Optical Fiber Laser Using Rare Earth-Added Fiber And Wide Band Light Source 审中-公开
标题翻译：使用稀土光纤和宽带光源的光纤激光器
公开(公告)号：US20070216993A1
公开(公告)日：2007-09-20
申请号：US10591665
申请日：2005-03-04
申请人： Keiichi Aiso , Masateru Tadakuma , Yuichi Takushima
发明人： Keiichi Aiso , Masateru Tadakuma , Yuichi Takushima
IPC分类号： H01S3/00
CPC分类号： H01S3/1112 , H01S3/06712 , H01S3/06725 , H01S3/06791
摘要： A fiber laser includes in a resonator: a normal dispersion optical fiber; an anomalous dispersion optical fiber; a rare earth-doped optical fiber as a gain medium; and a mode locking mechanism, in which at least the rare earth-doped optical fiber is included as the normal dispersion optical fiber, and a length of the rare earth-doped optical fiber is set shorter than that of the anomalous dispersion optical fiber.
摘要翻译：光纤激光器包括谐振器：正常色散光纤; 异常色散光纤; 作为增益介质的稀土掺杂光纤; 以及至少包含稀土掺杂光纤作为普通色散光纤的模式锁定机构，并且稀土掺杂光纤的长度被设定为短于异常色散光纤的长度。

5. 发明申请

US20050058417A1 Method and system for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber, method of manufacturing optical fibers, method of measuring wavelength-dispersion distribution, method of compensating for measurement errors, and method of specifying conditions of measurement 有权
标题翻译：用于测量光纤的波长色散和非线性系数的方法和系统，制造光纤的方法，测量波长色散分布的方法，补偿测量误差的方法以及指定测量条件的方法
公开(公告)号：US20050058417A1
公开(公告)日：2005-03-17
申请号：US10832875
申请日：2004-04-27
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： G01M11/00 , G02B6/02 , H04B10/08 , H04B10/18
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 thee 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。并根据变化率，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。

6. 发明授权

US07447444B2 Light source in optical transmission system, waveform shaper, optical pulse train generator, and optical reproduction system 有权
标题翻译：光传输系统中的光源，波形整形器，光脉冲发生器和光学再现系统
公开(公告)号：US07447444B2
公开(公告)日：2008-11-04
申请号：US11134275
申请日：2005-05-23
申请人： Koji Igarashi , Yoshihiro Emori , Atsushi Oguri , Shu Namiki , Osamu Aso , Masateru Tadakuma
发明人： Koji Igarashi , Yoshihiro Emori , Atsushi Oguri , Shu Namiki , Osamu Aso , Masateru Tadakuma
IPC分类号： H04B10/04
CPC分类号： G02F1/365 , G02F1/3513 , G02F2203/17 , G02F2203/26 , H01S5/0623 , H04B10/25077 , H04B10/291
摘要： The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering).
摘要翻译：本发明提供一种脉冲串发生器，包括：用于产生双频信号的双频信号光源; 用于孤子整形的孤子整形器来自双频信号光源的输出光; 以及用于对来自孤子整形器的输出光进行绝热孤子压缩的绝热孤子压缩器，并且还提供在该脉冲串发生器中使用的波形整形器，包括多个高度非线性的光传输线和多个低非线性光传输线其具有比多个高度非线性光传输线的非线性系数低的非线性系数，并且具有绝对值与多个高度非线性光传输线的绝对值不同的二阶色散值。此外，本发明提供了一种光源，其包括至少一个以多模振荡的多个连续光源; 多路复用器，用于复用来自连续光源的输出光; 以及用于在来自多路复用器的输出光上产生非线性现象以抑制SBS（受激布里渊散射）的非线性现象产生器。

7. 发明申请

US20080225276A1 SYSTEM FOR MEASURING THE WAVELENGTH DISPERSION AND NONLINEAR COEFFICIENT OF AN OPTICAL FIBER 有权
标题翻译：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。

8. 发明授权

US07155095B2 Method for efficient four-wave mixing generation and short pulse generation equipment using the method 失效
标题翻译：使用该方法的高效四波混频发生和短脉冲发生设备的方法
公开(公告)号：US07155095B2
公开(公告)日：2006-12-26
申请号：US10331565
申请日：2002-12-31
申请人： Osamu Aso , Masateru Tadakuma , Shu Namiki
发明人： Osamu Aso , Masateru Tadakuma , Shu Namiki
IPC分类号： G02B6/02
CPC分类号： G02F1/3536 , G02B6/2766 , G02F2201/02
摘要： The present invention provides a method for generating four-wave mixing to obtain idler light with high efficiency, in which the range of lengths of an optical fiber is appropriately set, and probe light and pumping light, having different frequencies, are launched into the optical fiber. When the nonlinear coefficient of the optical fiber, the loss per unit distance, and the wavelength and intensity of the probe light and pumping light are set to certain values, the idler light conversion efficiency at the output end of the optical fiber is a periodic function of an optical fiber having a maximal value and a minimal value. The maximum length of the optical fiber to be used to obtain four-wave mixing is set to be equal to or less than the length Lmax (Lmax=Lm+ΔL) which is given by adding the length of the optical fiber Lm, at which the idler light conversion efficiency takes on the first maximal value in the aforementioned periodic function and distance ΔL or 10% of L.
摘要翻译：本发明提供了一种用于产生四波混频的方法，以高效率获得惰性光，其中适当地设置光纤的长度范围，并且将具有不同频率的探测光和泵浦光发射到光学纤维。当光纤的非线性系数，每单位距离的损耗以及探测光和泵浦光的波长和强度被设置为一定值时，光纤输出端的惰轮光转换效率是周期性函数具有最大值和最小值的光纤。用于获得四波混频的光纤的最大长度被设定为等于或小于通过将光纤Lm的长度相加给出的长度Lmax（Lmax = Lm +ΔLL），其中，空转光转换效率在上述周期函数和距离DeltaL或L的10％处于第一最大值。

9. 发明授权

US07003202B2 Method and system for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber, method of manufacturing optical fibers, method of measuring wavelength-dispersion distribution, method of compensating for measurement errors, and method of specifying conditions of measurement 有权
标题翻译：用于测量光纤的波长色散和非线性系数的方法和系统，光纤的制造方法，测量波长色散分布的方法，补偿测量误差的方法以及指定测量条件的方法
公开(公告)号：US07003202B2
公开(公告)日：2006-02-21
申请号：US10832875
申请日：2004-04-27
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 thee 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。并根据变化率，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。

10. 发明申请

US20060029342A1 Method and system for measuring the wavelength dispersion and nonlinear coefficient of an optical fiber, method of manufacturing optical fibers, method of measuring wavelength-dispersion distribution, method of compensating for measurement errors, and method of specifying conditions of measurement 有权
公开(公告)号：US20060029342A1
公开(公告)日：2006-02-09
申请号：US11249808
申请日：2005-10-13
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
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.

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