公开(公告)号：US07061664B2

公开(公告)日：2006-06-13

申请号：US10688197

申请日：2003-10-17

申请人： Osamu Aso ,  Shu Namiki ,  Kouki Sato ,  Hijiri Nimura

发明人： Osamu Aso ,  Shu Namiki ,  Kouki Sato ,  Hijiri Nimura

IPC分类号： G02F1/365 ,  G02F1/39

CPC分类号： H04B10/299 ,  G02F1/3536 ,  G02F2/004 ,  H04B10/2563 ,  H04J14/02 ,  H04J14/0201 ,  H04J14/0213

摘要： A wavelength converter using difference frequency generation (DFG) is disclosed. In one embodiment, the wavelength converter comprises (a) a first optical filter configured to filter out one or more lightwaves requiring wavelength conversion from wavelength-division multiplexed (WDM) lightwaves, and (b) a broadband multi-channel simultaneous wavelength conversion portion comprising a pump source that generates pump light for use in the process of the DFG, a first optical combiner for combining said pump light with said filtered lightwaves, a high non-linear medium configured to generate wavelength converted lightwaves from said filtered lightwaves using the DFG, and a second optical filter for filtering said wavelength converted from said filtered lightwaves.

摘要翻译： 公开了使用差频产生（DFG）的波长转换器。 在一个实施例中，波长转换器包括（a）第一滤光器，被配置为从波分复用（WDM）光波滤出需要波长转换的一个或多个光波，以及（b）宽带多通道同时波长转换部分，包括 产生用于DFG过程中的泵浦光的泵浦源，用于将所述泵浦光与所述经滤波的光波组合的第一光合并器，配置为使用所述DFG从所述滤波的光波产生波长转换的光波的高非线性介质， 以及第二滤光器，用于对从所述滤波光波转换的所述波长进行滤波。

公开(公告)号：US06459525B1

公开(公告)日：2002-10-01

申请号：US09656755

申请日：2000-09-07

申请人： Osamu Aso ,  Shu Namiki

发明人： Osamu Aso ,  Shu Namiki

IPC分类号： G02F135

CPC分类号： G02F1/39 ,  G02F1/3536 ,  G02F2/004

摘要： A wavelength of pump is set to an anomalous dispersion area of an optical fiber for wavelength conversion and pump power is set to be larger than a predetermined threshold of MI so that wavelength conversion capable of flattening conversion efficiency spectrum within a wide bandwidth is permitted. A pumping source can oscillate a lightwave having a wavelength in the anomalous dispersion region of the optical fiber for wavelength conversion and intensity which can flatten the conversion efficiency spectrum over the wide bandwidth. By causing the DFWM by setting the wavelength of the pump to a wavelength &lgr;p with respect to an optical signal having a center wavelength &lgr;s, the optical signal is converted to a wavelength &lgr;c=(&lgr;s·&lgr;p)/(2&lgr;s−&lgr;p), and by previously seeking the wavelength &lgr;s of the optical signal before conversion and the wavelength &lgr;c of the optical signal after conversion, the wavelength of the pump is set to the wavelength &lgr;p=2(&lgr;s·&lgr;c)/(&lgr;s+&lgr;c), and the wavelength of the pump can flatten the conversion efficiency.

摘要翻译： 将波长的波长设定为用于波长转换的光纤的异常色散区域，并将泵浦功率设定为大于MI的预定阈值，从而允许能够在宽带宽内变换转换效率频谱的波长转换。 泵浦源可以振荡具有用于波长转换的光纤的异常色散区域中的波长的光波和可以在宽带宽上平坦化转换效率光谱的强度。 通过将泵的波长相对于具有中心波长的光信号设定为波长lambdp来引起DFWM，光信号被转换成波长lambdc =（lambds.lambdp）/（2lambds-lambdp），并且 通过先前寻求转换之前的光信号的波长和转换后的光信号的波长lambdc，泵的波长被设置为波长lambdp = 2（lambds.lambdc）/（lambds + lambdc），并且 泵的波长可以平坦化转换效率。

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。

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。

公开(公告)号：US06665113B2

公开(公告)日：2003-12-16

申请号：US09750535

申请日：2000-12-28

申请人： Osamu Aso ,  Shu Namiki ,  Kouki Sato ,  Hijiri Nimura

发明人： Osamu Aso ,  Shu Namiki ,  Kouki Sato ,  Hijiri Nimura

IPC分类号： G02F200

CPC分类号： H04B10/299 ,  G02F1/3536 ,  G02F2/004 ,  H04B10/2563 ,  H04J14/02 ,  H04J14/0201

摘要： Solely lightwaves required to be wavelength converted are filtered out from the input broadband WDM lightwaves and are wavelength converted by use of FWM. Not only the broadband simultaneous wavelength conversion that is studied by many researchers, but also more flexible, sub-band wavelength conversion is realized. Frequency interval of the input WDM lightwaves is broadened or reduced in comparison of the frequency interval of the WDM lightwaves inputted to the wavelength converter. The frequency interval variation techniques using the wavelength converter, it can be realized to transfer from a transmission line less influenced by inter-channel crosstalk due to FWM to the different transmission lines strongly influenced by inter-channel crosstalk due to FWM, and vice versa.

摘要翻译： 需要进行波长转换的唯一光波从输入宽带WDM光波中滤出，并通过使用FWM进行波长转换。 不仅实现了许多研究人员研究的宽带同时波长转换，而且实现了更灵活的子带波长转换。 与输入到波长转换器的WDM光波的频率间隔相比，输入WDM光波的频率间隔变宽或减小。 使用波长转换器的频率间隔变化技术可以实现从由于FWM而受到由信道间串扰的较少影响的传输线传输到由FWM引起的由信道间串扰强烈影响的不同传输线路，反之亦然。

公开(公告)号：US06384964B1

公开(公告)日：2002-05-07

申请号：US09492007

申请日：2000-01-27

申请人： Kazuyo Mizuno ,  Shoichi Ozawa ,  Osamu Aso ,  Shu Namiki ,  Yuichiro Irie

发明人： Kazuyo Mizuno ,  Shoichi Ozawa ,  Osamu Aso ,  Shu Namiki ,  Yuichiro Irie

IPC分类号： H01S300

CPC分类号： H01S3/10023 ,  H01S3/06754 ,  H01S2301/04

摘要： The present invention effectively compensates gain wavelength dependency of optical amplifiers by a simple method. That is, a value smaller than the minimum value of gain, in the range of usage wavelengths, of gain wavelength dependency data of the optical amplifiers is predetermined as a reference gain value. A loss wavelength characteristic which counterbalances the gain greater than the reference gain value is provided as an ideal loss wavelength characteristic which completely compensates the gain wavelength dependency.

摘要翻译： 本发明通过简单的方法有效地补偿光放大器的增益波长依赖性。 也就是说，将光放大器的增益波长依赖性数据的使用波长范围内的增益的最小值小的值作为基准增益值进行预定。 将增益大于参考增益值的平衡的损耗波长特性提供为完全补偿增益波长相关性的理想损耗波长特性。