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1.发明授权公开(公告)号：US07373086B2
公开(公告)日：2008-05-13
申请号：US10446971
申请日：2003-05-28
申请人： Takashi Yamamoto , Satoki Kawanishi
发明人： Takashi Yamamoto , Satoki Kawanishi
IPC分类号： H04B10/12
CPC分类号： G02F2/002 , G02F2203/56
摘要： With a single laser light source, the line width of a beat signal is set to a few tens of kHz or less without it fluctuating over time, and the frequency thereof is set as desired. CW light from a CW laser light source is input into an electroabsorption modulator to which a sine wave electrical signal is applied. A modulation sideband which is made up from line spectra at separations equal to the modulation frequency is generated from the electroabsorption modulator. An optical fiber for higher-order soliton compression broadens the optical spectrum width, and increases the number of line spectra. A tunable wavelength filtering device which is made up from optical fiber gratings and optical circulators chooses two of the line spectra, which are combined by an optical coupler with their beat signal being heterodyne wave detected by a photo-detector.
摘要翻译： 使用单个激光源，拍频信号的线宽被设定为几十kHz或更小，而不会随时间而波动，并且其频率根据需要设定。 来自CW激光光源的CW光被输入到施加正弦波电信号的电吸收调制器中。 从电吸收调制器产生由分离等于调制频率的线谱构成的调制边带。 用于高阶孤子压缩的光纤拓宽光谱宽度，并增加线谱的数量。 由光纤光栅和光循环器组成的可调谐波长滤波器选择两个线光谱，它们由光耦合器组合，其拍频信号是由光检测器检测的外差波。
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2.发明授权公开(公告)号：US07046887B2
公开(公告)日：2006-05-16
申请号：US10491068
申请日：2002-09-26
IPC分类号： G02B6/17
CPC分类号： G02B6/024 , G02B6/02 , G02B6/02338 , G02B6/02357 , G02B6/105
摘要： A polarization-maintaining optical fiber and absolutely single-polarization optical fiber are provided which enable long distance transmission maintaining a polarization state of signal light. The polarization-maintaining optical fiber includes a core, photonic crystal cladding, and jacket. The photonic crystal cladding is divided into four segments by broken lines from the center to the periphery. Among a plurality of grating holes in a pair of segments opposed to each other with respect to the core, the diameter of grating holes close to the core is greater than the diameter of grating holes in another pair of segments opposed with each other, and than a grating constant.
摘要翻译： 提供了保持偏振的光纤和绝对单偏振光纤，其能够保持信号光的偏振状态的长距离传输。 偏振保持光纤包括芯，光子晶体包层和护套。 光子晶体包层由从中心到外围的虚线分成四段。 在相对于芯彼此相对的一对区段中的多个光栅孔中，靠近芯的光栅孔的直径大于彼此相对的另一对区段中的光栅孔的直径，并且比 光栅常数。
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公开(公告)号：US20050084223A1
公开(公告)日：2005-04-21
申请号：US10501983
申请日：2003-01-23
申请人： Masatoshi Tanaka , Shinya Yamadori , Moriyuki Fujita , Satoki Kawanishi , Kazunori Suzuki , Hirokazu Kubota
发明人： Masatoshi Tanaka , Shinya Yamadori , Moriyuki Fujita , Satoki Kawanishi , Kazunori Suzuki , Hirokazu Kubota
CPC分类号： G02B6/024 , C03B37/01217 , C03B37/0122 , C03B2203/14 , C03B2203/30 , C03B2203/42 , G02B6/02333 , G02B6/02347 , G02B6/02357
摘要： A polarization-maintaining photonic crystal fiber 10 includes six thin holes 4a and 4b adjacent to a core 1. Among these holes 4a and 4b, a pair of holes 4b at opposite sides of the core 1 have a diameter greater than that of the other four thin holes 4a, and therefore, the polarization-maintaining photonic crystal fiber 10 has polarization-maintaining ability. An overclad layer 3 exists around the clad layer 2 which includes a large number of thin holes 4a and 4b around the core 1. The overclad layer 3 includes a pair of marking portions 5 at opposite sides of the core 1. The marking portions 5 are holes which can be seen at positions different from the clad layer 2 when the fiber 10 is viewed from a position right above the fiber 10 in the drawing. In this way, the direction of the polarization plane of the polarization-maintaining photonic crystal fiber 10 is identified.
摘要翻译： 偏振保持光子晶体光纤10包括与芯1相邻的六个细孔4a和4b。 在这些孔4a和4b中，在芯1的相对侧的一对孔4b的直径大于其他四个细孔4a的直径，因此，保偏光子晶体光纤10具有极化 维持能力。 外包层3存在于包层2周围，该包层2包括围绕芯1的大量薄孔4a和4b。 外包层3在芯1的相对侧包括一对标记部分5。 标记部5是从图中的纤维10的正上方观察纤维10时，可以看到与包覆层2不同的位置的孔。 以这种方式，识别出偏振保持光子晶体光纤10的偏振面的方向。
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4.发明申请公开(公告)号：US20050025441A1
公开(公告)日：2005-02-03
申请号：US10491068
申请日：2002-09-26
CPC分类号： G02B6/024 , G02B6/02 , G02B6/02338 , G02B6/02357 , G02B6/105
摘要： A polarization-maintaining optical fiber and absolutely single-polarization optical fiber are provided which enable long distance transmission maintaining a polarization state of signal light. The polarization-maintaining optical fiber includes a core, photonic crystal cladding, and jacket. The photonic crystal cladding is divided into four segments by broken lines from the center to the periphery. Among a plurality of grating holes in a pair of segments opposed to each other with respect to the core, the diameter of grating holes close to the core is greater than the diameter of grating holes in another pair of segments opposed with each other, and than a grating constant.
摘要翻译： 提供了保持偏振的光纤和绝对单偏振光纤，其能够保持信号光的偏振状态的长距离传输。 偏振保持光纤包括芯，光子晶体包层和护套。 光子晶体包层由从中心到外围的虚线分成四段。 在相对于芯彼此相对的一对区段中的多个光栅孔中，靠近芯的光栅孔的直径大于彼此相对的另一对区段中的光栅孔的直径，并且比 光栅常数。
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5.发明授权公开(公告)号：US06788865B2
公开(公告)日：2004-09-07
申请号：US09799150
申请日：2001-03-05
IPC分类号： G02B620
CPC分类号： G02B6/02328 , G02B6/02347 , G02B6/02357 , G02B6/105
摘要： A polarization maintaining optical fiber is formed by using a core in a cross sectional shape having different diameters along two orthogonal axes defined on a plane perpendicular to an optical axis, or a photonic crystal structure cladding having a diffraction grating with lattice intervals for realizing confinement of lights within the core which are different along two orthogonal axes defined on a plane perpendicular to an optical axis, or the photonic crystal structure cladding that is divided into four divided portions along a circumferential direction, where at least a part of lattice holes in a first pair of divided portions that are facing each other along one direction have a diameter larger than that of lattice holes in a second pair of divided portions that are facing each other along another direction orthogonal to the one direction.
摘要翻译： 通过使用具有沿垂直于光轴的平面上限定的两个正交轴的具有不同直径的横截面形状的芯或具有用于实现限制的晶格间隔的衍射光栅的光子晶体结构包层形成偏振维持光纤 芯部内的光沿着与垂直于光轴的平面限定的两个正交轴不同，或者沿着圆周方向分成四个分割部分的光子晶体结构包层，其中第一 沿着一个方向彼此面对的一对分割部分的直径大于沿着与该一个方向正交的另一方向彼此面对的第二对分割部分中的格子孔的直径。
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公开(公告)号：US06404966B1
公开(公告)日：2002-06-11
申请号：US09306498
申请日：1999-05-06
IPC分类号： G02B602
CPC分类号： G02B6/02328 , C03B37/01205 , C03B2201/12 , C03B2201/28 , C03B2203/10 , C03B2203/16 , C03B2203/30 , C03B2203/42 , G02B6/02333 , G02B6/02347 , G02B6/105
摘要： An optical fiber including a core having an area of about several times an optical wavelength and composed of a hollow hole, and a cladding having a diffraction grating which is arranged at least in a peripheral area adjacent to the core and has a grating period equal to ½ the optical wavelength.
摘要翻译： 一种光纤，包括具有大约几倍于光波长并由中空孔组成的芯的芯，以及具有衍射光栅的包层，该衍射光栅至少布置在与芯相邻的周边区域中，并且具有等于 1/2的光波长。
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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
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。
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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
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。
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公开(公告)号：US5646774A
公开(公告)日：1997-07-08
申请号：US585566
申请日：1996-01-16
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。
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公开(公告)号：US08014645B2
公开(公告)日：2011-09-06
申请号：US10514530
申请日：2003-05-16
IPC分类号： G02B6/028
CPC分类号： G02B6/02338 , G02B6/02042 , G02B6/02242 , G02B6/02276 , G02B6/02347 , G02B6/02361 , G02B6/0281 , G02B6/03627 , G02B6/03644 , G02B6/03688
摘要： A 1.55 μm band dispersion shifted optical fiber is provided which has a low loss and low dispersion slope. A core region “a” is heavily doped with GeO2 . A core region “b” is composed of pure SiO2 glass. A cladding section is arranged around the core region. The cladding section has a lot of holes extending in the longitudinal direction of the optical fiber. The holes of the cladding section are not located at random, but have a honeycomb structure composed of regular hexagons which have a side length of Λ, and serve as a primitive lattice. The center of the core section has a region having a refractive index higher than that of the periphery of the core section. The core section has the refractive index distribution in which the group velocity dispersion at the operation wavelength of the region becomes the normal dispersion.
摘要翻译： 提供1.55μm带隙色散位移光纤，其具有低损耗和低色散斜率。 核心区域“a”被GeO2重掺杂。 核心区域“b”由纯SiO 2玻璃构成。 围绕芯区域布置包层部分。 包层部具有沿着光纤的长度方向延伸的大量孔。 包层部分的孔不是随机的，而是具有由正方形六边形组成的蜂窝结构，其具有Λ的边长，并且用作原始晶格。 芯部的中心具有折射率高于芯部的周边的区域。 芯部具有折射率分布，其中该区域的工作波长处的群速度色散变为正常色散。
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