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1. 发明授权

US06671444B1 Optical fiber 有权
标题翻译：光纤
公开(公告)号：US06671444B1
公开(公告)日：2003-12-30
申请号：US09763850
申请日：2001-05-21
申请人： Shinichi Arai , Takeshi Yagi , Kunihiko Mori , Hidehiko Takara , Satoki Kawanishi
发明人： Shinichi Arai , Takeshi Yagi , Kunihiko Mori , Hidehiko Takara , Satoki Kawanishi
IPC分类号： G02B602
CPC分类号： G02B6/02004 , G02B6/02242 , G02B6/03627 , G02B6/105 , G02F1/3555 , G02F1/365 , G02F2201/02 , G02F2203/06 , H01S3/302
摘要： An optical fiber, capable of generating by means of nonlinear phenomena, white light in adequately broadened wavelength bands at both sides of a pumping optical pulse that is input, and stabilizing the polarized conditions. The fiber is formed by covering a core with a first cladding, and covering the first cladding with a second cladding, where the second cladding has a refractive index greater than that of the first cladding, but lower than that of the core. Stress-applying parts are provided inside the second cladding so as to sandwich the core from both sides to form a polarization-maintaining optical fiber. The shortest distance between the stress-applying parts is made 2.3 times or more the mode field diameter for the wavelength of the pumping optical pulse.
摘要翻译：能够通过非线性现象产生的光纤，在输入的泵浦光脉冲的两侧上的白光充分变宽的波长带，并稳定极化条件。纤维通过用第一包层覆盖芯并且用第二包层覆盖第一包层而形成，其中第二包层的折射率大于第一包层的折射率，但是低于芯的折射率。应力施加部件设置在第二包层内部，以便从两侧夹住芯部以形成偏振保持光纤。应力施加部之间的最短距离为泵浦光脉冲的波长的模场直径的2.3倍以上。

2. 发明授权

US5999548A White optical pulse source and applications 失效
标题翻译：白光脉冲源及应用
公开(公告)号：US5999548A
公开(公告)日：1999-12-07
申请号：US98323
申请日：1998-06-16
申请人： Kunihiko Mori , Hidehiko Takara , Satoki Kawanishi , Masatoshi Saruwatari
发明人： Kunihiko Mori , Hidehiko Takara , Satoki Kawanishi , Masatoshi Saruwatari
IPC分类号： G02F1/365 , H01S3/10
CPC分类号： G02F1/365 , G02F2001/3528 , H01S3/0078 , H01S3/1305 , Y10S372/703
摘要： The present invention relates to a white pulse source that produces spectrally shaped white pulses of a constant optical output power over a wide wavelength range. The white pulse source includes a pump pulse source for generating pump pulses with a center wavelength .lambda.0 and a waveguided nonlinear optical medium with a length L. The waveguided nonlinear optical medium is characterized by two properties: the first property is that chromatic dispersion D(.lambda.0,z) at the center wavelength of pump pulses in ps/nm/km is positive at an input end of said waveguided nonlinear optical medium, where z=0, and decreases towards an output end. The second property is that said chromatic dispersion D(.lambda., z) has a maximum value D(.lambda.p(z), z) at a peak wavelength .lambda.p(z) within a range of propagation distance given by L1.ltoreq.z.ltoreq.L where 0.ltoreq.L1
摘要翻译：白色脉冲源技术领域本发明涉及在宽波长范围内产生恒定光输出功率的光谱形白脉冲的白脉冲源。白色脉冲源包括用于产生具有中心波长λ0的泵浦脉冲的泵浦脉冲源和具有长度L的波导非线性光学介质。波导非线性光学介质的特征在于两个性质：第一特性是色散D（在所述波导非线性光学介质的输入端，在ps / nm / km的泵浦脉冲的中心波长处的λ0，z z为正，其中z = 0，并且朝向输出端减小。第二个特征是所述色散D（λ，z）在由L1

3. 发明授权

US5960146A Optical fiber and light source apparatus 失效
标题翻译：光纤和光源设备
公开(公告)号：US5960146A
公开(公告)日：1999-09-28
申请号：US899571
申请日：1997-07-24
申请人： Toshiaki Okuno , Masashi Onishi , Masayuki Nishimura , Satoki Kawanishi , Hidehiko Takara , Kunihiko Mori
发明人： Toshiaki Okuno , Masashi Onishi , Masayuki Nishimura , Satoki Kawanishi , Hidehiko Takara , Kunihiko Mori
IPC分类号： G02F1/35 , G02F1/365 , G02B6/16
CPC分类号： G02B6/02247 , G02B6/0228 , G02F1/3511 , G02F1/365 , G02B6/02228
摘要： High peak pulse light is incident on an optical fiber having a dispersion decreasing region which serves as a main region for generating supercontinuum or idler light and in which the chromatic dispersion does not increase but at least partially decreases in the direction in which light travels. The fiber can be applied to broad band width idler light generation with both light transmission directions. Four wave mixing upon incidence of the light on the dispersion decreasing region of the optical fiber are efficiently obtained.
摘要翻译：高峰脉冲光入射到具有作为用于产生超连续光或空载光的主要区域的色散减小区域的光纤上，并且其中色散不会增加但在光行进方向上至少部分地减小。光纤可以应用于具有两个光传输方向的宽带宽的惰轮光产生。有效地获得光入射到光纤的色散减少区域上的四波混合。

4. 发明授权

US06842565B2 Optical modulation/multiplexing circuit 失效
标题翻译：光调制/复用电路
公开(公告)号：US06842565B2
公开(公告)日：2005-01-11
申请号：US10437586
申请日：2003-05-14
申请人： Takuya Ohara , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
发明人： Takuya Ohara , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
IPC分类号： G02F1/39 , G02F1/377 , H04J14/08 , H04L7/00 , G02B6/28
CPC分类号： H04J14/08 , H04L7/0075
摘要： An optical modulation/multiplexing circuit can fabricate a plurality of nonlinear optical waveguide devices and silica optical waveguides through a small number of processes, and achieve the simplification of the fabrication process and stabilization of the operation by hybrid integration with reduced connection loss. It employs lithium niobate domain inversion optical waveguides as nonlinear optical switches, and implements functions necessary for modulation and multiplexing such as input, splitting, multiplexing and timing adjustment of optical modulation signals and an optical clock signal by connecting glass waveguides to the input and output terminals of the domain inversion optical waveguides. Nonlinear optical media generate a second harmonic light beam of the optical clock signal, and at the same time produces a light beam with a frequency corresponding to the difference frequency of the two high frequency signals, the second harmonic light beam and the signal pulses.
摘要翻译：光调制/复用电路可以通过少量工艺制造多个非线性光波导器件和二氧化硅光波导，并通过混合集成实现简化制造工艺和稳定操作，减少连接损耗。它采用铌酸铌畴反射光波导作为非线性光开关，通过将玻璃波导连接到输入和输出端，实现调制和复用所必需的功能，如光调制信号的输入，分离，复用和时序调整以及光时钟信号的域反转光波导。非线性光学介质产生光时钟信号的二次谐波光束，并且同时产生具有对应于两个高频信号，二次谐波光束和信号脉冲的差频的频率的光束。

5. 发明授权

US5646774A Mode-locked laser stabilizing method and apparatus 失效
标题翻译：锁模式激光稳定方法及装置
公开(公告)号：US5646774A
公开(公告)日：1997-07-08
申请号：US585566
申请日：1996-01-16
申请人： Hidehiko Takara , Satoki Kawanishi , Masatoshi Saruwatari
发明人： Hidehiko Takara , Satoki Kawanishi , Masatoshi Saruwatari
IPC分类号： G02B6/00 , G02B6/12 , H01S3/06 , H01S3/067 , H01S3/083 , H01S3/098 , H01S3/10 , H01S3/13 , H01S3/136 , H01S3/139 , H01S3/00
CPC分类号： H01S3/1109 , H01S3/06791 , H01S3/106 , H01S3/1067 , H01S3/139
摘要： This invention is an improvement of a mode-locked laser stabilizing method and apparatus used with a mode-locked laser apparatus which comprises an optical cavity which consists of an optical modulator which modulates the loss or the phase of light at a fixed frequency, an optical delay line to electrically change the optical path length of the cavity, and an optical amplifier which amplifies a modulated optical pulses. In this method, at least one of the relaxation oscillation frequency components and the harmonic components in the output optical pulses of the mode-locked laser are extracted, and a process of controlling the optical delay line by using the extracted frequency component as an error signal for feedback control and to suppress the error signal below a fixed value.
摘要翻译：本发明是与锁模激光装置一起使用的锁模式激光稳定化方法和装置的改进，该装置包括一个光腔，该光腔由调制固定频率的光的损耗或相位的光调制器组成，延迟线以电变化腔的光路长度，以及放大经调制的光脉冲的光放大器。在该方法中，提取了锁模激光器的输出光脉冲中的弛豫振荡频率分量和谐波分量中的至少一个，并且通过使用提取的频率分量作为误差信号来控制光学延迟线的处理用于反馈控制，并将误差信号抑制在固定值以下。

6. 发明授权

US5267256A Wavelength division multiplex type mode - lock laser device 失效
标题翻译：波分复用型锁模激光器件
公开(公告)号：US5267256A
公开(公告)日：1993-11-30
申请号：US943832
申请日：1992-09-14
申请人： Masatoshi Saruwatari , Satoki Kawanishi , Hidehiko Takara , John Schlager
发明人： Masatoshi Saruwatari , Satoki Kawanishi , Hidehiko Takara , John Schlager
IPC分类号： H01S3/07 , H01S3/06 , H01S3/067 , H01S3/08 , H01S3/083 , H01S3/094 , H01S3/0941 , H01S3/098
CPC分类号： H04B10/572 , H01S3/083 , H01S3/094 , H01S3/1109 , H04B10/506 , H01S3/08086
摘要： A wavelength division multiplex type mode-lock laser device which simultaneously generates high-speed optical pulse trains for more than one wavelength. This device simultaneously generates high-speed optical pulse trains at two or more wavelengths. A ring resonator type mode-lock laser device or a Fabry-Perot type mode-lock laser device is modified so that it has an optical path difference providing structure which provides different refractive indices for the polarization directions which are at right angles at one another. This enables configuring a resonator corresponding to the optical path lengths formed according to the refractive indices and hetero-wave length optical path equalizing means to provide different refractive indices for different wavelengths.
摘要翻译：一种同时产生多于一个波长的高速光脉冲串的波分复用型锁模激光装置。该装置同时产生两个或更多个波长的高速光脉冲串。环形谐振器型锁模激光器件或法布里 - 珀罗型模式锁定激光器件被修改为具有对于彼此成直角的偏振方向提供不同折射率的光程差提供结构。这使得可以配置对应于根据折射率形成的光路长度的谐振器和异波长光路均衡装置，以提供不同波长的不同折射率。

7. 发明授权

US06697395B2 Sum frequency light generation method and sum frequency light generation apparatus adapatble for wide-band wavelength conversion 有权
标题翻译：求和频率光产生方法和和频光发生装置适用于宽带波长转换
公开(公告)号：US06697395B2
公开(公告)日：2004-02-24
申请号：US10096037
申请日：2002-03-12
申请人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
发明人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
IPC分类号： H01S310
CPC分类号： G02F1/3534 , G02F1/3544 , G02F2203/07
摘要： A nonlinear optical crystal allowing type 2 phase matching multiplexes a fixed wavelength light having an angular frequency &ohgr;D and a variable wavelength light having an angular frequency &ohgr;S, with the polarization directions thereof being perpendicular to each other, so as to produce a sum frequency light having an angular frequency &ohgr;D+&ohgr;S. When multiplexing the fixed wavelength light and the variable wavelength light through the nonlinear optical crystal, a controlling section controls the polarization direction of the fixed wavelength light so as to be parallel to a predetermined reference axis within a plane vertical to a phase matching direction of the nonlinear optical crystal. Even when the wavelength of inputted light is changed, the predetermined reference axis is a single axis which maintains parallelism with the crystal axis of the nonlinear optical crystal.
摘要翻译：允许2型相位匹配的非线性光学晶体复用具有角频率ωD的固定波长光和具有角频率ωs的可变波长光，其偏振方向彼此垂直，以便产生具有角频率ω+ D +ω。当通过非线性光学晶体复用固定波长光和可变波长光时，控制部分将固定波长的光的偏振方向控制在垂直于垂直于相位匹配方向的平面内的预定基准轴上非线性光学晶体。即使输入光的波长发生变化，规定的基准轴也是与非线性光学晶体的晶轴平行的单轴。

8. 发明授权

US5590143A Multiple-frequency-modulation type mode-locked laser device 失效
标题翻译：多频调制型锁模激光器件
公开(公告)号：US5590143A
公开(公告)日：1996-12-31
申请号：US398177
申请日：1995-03-02
申请人： Hidehiko Takara , Satoki Kawanishi , Masatoshi Saruwatari
发明人： Hidehiko Takara , Satoki Kawanishi , Masatoshi Saruwatari
IPC分类号： H01S3/083 , H01S3/098 , H01S3/107 , H01S3/10
CPC分类号： H01S3/1109 , H01S3/107 , H01S3/083 , H01S3/2383
摘要： A multiple-frequency-modulation mode-locked laser device which generates high-speed optical pulse trains and can be used as a high-speed optical pulse source in the fields of optical communications and optical measurement is presented, wherein the repetition frequency F.sub.rep and the pulse width .DELTA.t are able to be controlled independently with only the laser itself.A drive signal generation means is provided which generates a frequency-mixed drive signal mixed from at least two different frequencies f.sub.1 (=N.sub.1 f.sub.r), f.sub.2 (=N.sub.2 f.sub.r), . . . , which are integral multiples of the frequency spacing f.sub.r (=c/R) of the longitudinal modes of either a ring cavity or a Fabry-Perot cavity. This frequency-mixed drive signal is supplied to an optical modulation means of the cavity.
摘要翻译：提出了一种生成高速光脉冲串并可用作光通信和光学测量领域的高速光脉冲源的多频调制锁模激光装置，其中重复频率Frep和脉冲宽度DELTA t只能用激光本身独立控制。提供了一种驱动信号产生装置，其产生从至少两个不同频率f1（= N1fr），f2（= N2fr）混合的频率混合驱动信号。。。，它们是环腔或法布里 - 珀罗腔的纵向模式的频率间隔fr（= c / R）的整数倍。该频率混合驱动信号被提供给空腔的光调制装置。

9. 发明授权

US07151897B2 Optical clock phase-locked loop circuit 失效
标题翻译：光时钟锁相环电路
公开(公告)号：US07151897B2
公开(公告)日：2006-12-19
申请号：US10310086
申请日：2002-12-04
申请人： Takuya Ohara , Hidehiko Takara , Satoki Kawanishi
发明人： Takuya Ohara , Hidehiko Takara , Satoki Kawanishi
IPC分类号： H04B10/00 , H04B10/08 , H04B17/00
CPC分类号： H04L7/0075
摘要： This optical clock phase-locked loop circuit includes an oscillator 12, an optical coupler 2, an optical cross-correlation detection device 3 that outputs light containing the correlating components of two lights from the coupled light of optical coupler 2, an optical band pass filter 4 that extracts light of a wavelength that contains cross-correlating components, an optical receiver 5, a phase comparator 6 that compares the phases of the output signal of the oscillator 12 and the cross-correlation signal from the optical receiver 5, a voltage controlled oscillator 7 that changes the oscillation frequency and phase corresponding to the output of the phase comparator 6, an optical pulse generator 8 that generates a optical clock pulse containing an nth harmonic component, an optical coupler 10 that divides optical clock, and an optical modulator 11 driven by low-frequency oscillator 12 that modulates optical clock from optical coupler 10.
摘要翻译：该光时钟锁相环电路包括振荡器12，光耦合器2，光互相关检测装置3，其从光耦合器2的耦合光输出包含两个光的相关分量的光，光学带通滤波器提取包含互相关分量的波长的光，光接收器5，比较振荡器12的输出信号的相位和来自光接收器5的互相关信号的相位比较器6，电压控制振荡器7，其改变与相位比较器6的输出相对应的振荡频率和相位;产生包含第n次谐波分量的光时钟脉冲的光脉冲发生器8，分割光时钟的光耦合器10和光调制器11 由调制来自光耦合器10的光时钟的低频振荡器12驱动。

10. 发明授权

US06720548B2 Optical sampling waveform measuring apparatus aiming at achieving wider band 有权
标题翻译：光采样波形测量装置旨在实现更宽的频带
公开(公告)号：US06720548B2
公开(公告)日：2004-04-13
申请号：US10095982
申请日：2002-03-12
申请人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
发明人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
IPC分类号： G02F101
CPC分类号： G01J11/00 , G02F1/3534
摘要： A nonlinear optical crystal is composed of 2-adamantyl-5-nitorpyridine (AANP) allowing the type 2 phase matching to the sampling light and a measuring object light, emitting a sum frequency light of the measuring object light and the sampling light, with the polarization directions thereof being perpendicular to each other, when the sampling light and measuring object light multiplexed by a multiplexer are entered. When the sum frequency light is emitted through the nonlinear optical crystal, a control portion controls the polarization direction of the sampling light so as to be parallel to a predetermined reference axis located within a plane perpendicular to a phase matching direction of the nonlinear optical crystal. The predetermined reference axis is a single axis maintaining parallelism with the crystal axis of the nonlinear optical crystal even if the wavelength of the inputted light is changed.
摘要翻译：非线性光学晶体由允许与采样光进行2相匹配的2-金刚烷基-5-硝基吡啶（AANP）和测量对象光组成，发射测量对象光和采样光的和频光，与当由多路复用器复用的采样光和测量对象光进入时，其极化方向彼此垂直。当通过非线性光学晶体发射和频光时，控制部分将采样光的偏振方向控制成与位于垂直于非线性光学晶体的相位匹配方向的平面内的预定参考轴平行。即使输入光的波长发生变化，预定的基准轴也是与非线性光学晶体的晶轴保持平行的单轴。

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