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    • 1. 发明申请
    • Wavelength conversion element with quasi-phase matching structure
    • 具有准相位匹配结构的波长转换元件
    • US20080080044A1
    • 2008-04-03
    • US11905358
    • 2007-09-28
    • Hideaki OkayamaYutaka Okabe
    • Hideaki OkayamaYutaka Okabe
    • G02F1/365
    • G02F1/3558G02F2001/3548
    • A wavelength conversion element with a Quasi-Phase Matching structure which can suppress the ripples of fluctuation pulse waveforms of a change efficiency in a frequency band of the waveform conversion, without controlling the positions and dimensions of the polarization regions at high precision. The wavelength conversion element of the present invention has a plurality of first and second polarization regions, formed so that dielectric polarizations are inverted from each other, and an optical wave guide which is formed so as to pass through the first and second polarization regions, in a nonlinear optical substrate. And an absolute value of the wavelength conversion efficiency is set by adjusting the positional coordinates of the first and second polarization regions in a light traveling direction.
    • 具有准相位匹配结构的波长转换元件,其可以抑制波形转换的频带中的变化效率的波动脉冲波形的波动,而不以高精度控制极化区域的位置和尺寸。 本发明的波长转换元件具有多个第一和第二偏振区域,其形成为使得介电极化彼此反转,并且形成为穿过第一和第二偏振区域的光波导在 非线性光学基板。 并且通过调整光行进方向上的第一偏振区域和第二偏振区域的位置坐标来设置波长转换效率的绝对值。
    • 2. 发明授权
    • Wavelength conversion element with quasi-phase matching structure
    • 具有准相位匹配结构的波长转换元件
    • US07511878B2
    • 2009-03-31
    • US11905358
    • 2007-09-28
    • Hideaki OkayamaYutaka Okabe
    • Hideaki OkayamaYutaka Okabe
    • G02F2/02
    • G02F1/3558G02F2001/3548
    • A wavelength conversion element with a Quasi-Phase Matching structure which can suppress the ripples of fluctuation pulse waveforms of a change efficiency in a frequency band of the waveform conversion, without controlling the positions and dimensions of the polarization regions at high precision. The wavelength conversion element of the present invention has a plurality of first and second polarization regions, formed so that dielectric polarizations are inverted from each other, and an optical wave guide which is formed so as to pass through the first and second polarization regions, in a nonlinear optical substrate. And an absolute value of the wavelength conversion efficiency is set by adjusting the positional coordinates of the first and second polarization regions in a light traveling direction.
    • 具有准相位匹配结构的波长转换元件,其可以抑制波形转换的频带中的变化效率的波动脉冲波形的波动,而不以高精度控制极化区域的位置和尺寸。 本发明的波长转换元件具有多个第一和第二偏振区域,其形成为使得介电极化彼此反转,并且形成为穿过第一和第二偏振区域的光波导在 非线性光学基板。 并且通过调整光行进方向上的第一偏振区域和第二偏振区域的位置坐标来设定波长转换效率的绝对值。
    • 5. 发明申请
    • Method for manufacturing nonlinear optical element
    • 制造非线性光学元件的方法
    • US20060205096A1
    • 2006-09-14
    • US11364006
    • 2006-03-01
    • Yutaka Okabe
    • Yutaka Okabe
    • H01L21/00
    • G02F1/3775
    • An insulating film is formed on a first principal surface of the substrate. A periodic structure formation zone corresponding to a periodic structure formation region to be formed in the substrate, a plurality of polarization inversion zones corresponding to polarization inversion regions to be formed in a periodic arrangement in the periodic structure formation region, and a connection zone corresponding to a connection region to connect the plurality of polarization inversion regions, are set on the insulating film. The portions of the insulating film in the polarization inversion zones and the connection zone are removed, forming an insulating film pattern which exposes portions of the first principal surface of the substrate. A high voltage is applied, through an electrolytic solution, across the portions of the first principal surface exposed out of the insulating film pattern and the second principal surface of the substrate, to cause inversion of the polarization direction in the polarization inversion regions.
    • 绝缘膜形成在基板的第一主表面上。 对应于要在基板中形成的周期性结构形成区域的周期性结构形成区域,对应于在周期性结构形成区域中以周期性布置形成的极化反转区域的多个极化反转区域和对应于 连接多个极化反转区域的连接区域被设置在绝缘膜上。 去除极化反转区域和连接区域中的绝缘膜的部分,形成暴露基板的第一主表面的部分的绝缘膜图案。 通过电解液在从绝缘膜图案和基板的第二主表面露出的第一主表面的部分上施加高电压,以引起极化反转区域中的偏振方向的反转。
    • 6. 发明授权
    • Optical demultiplexer and optical multiplexer for wavelength division multiplex communication
    • 用于波分复用通信的光解复用器和光复用器
    • US06856722B2
    • 2005-02-15
    • US10367694
    • 2003-02-19
    • Hironori SasakiYutaka Okabe
    • Hironori SasakiYutaka Okabe
    • G02B5/26G02B5/28G02B6/293G02B6/34G02B6/28
    • G02B6/2938G02B6/29367
    • An optical demultiplexer/multiplexer for wavelength division multiplex communication includes: a light irradiating unit for irradiating a spherical wave containing light waves of different wavelengths; optical fibers for respectively receiving the different wavelengths of the demultiplexed light wave; a converting lens for receiving the spherical wave and converting the spherical wave into a parallel wave; WDM filters each for selecting and reflecting the light wave in the parallel wave and transmitting the residual light waves; guide lenses for receiving the light waves reflected by the WDM filters, converging, and transmitting the light waves to the optical fibers; and reflecting mirrors for receiving the light waves and reflecting the light waves toward the WDM filters. The parallel wave advances from the converting lens, is selected and reflected by the WDM filter, reflected, returned to the WDM filter, selected and reflected again, converged by the guide lens, and demultiplexed by the optical fiber every wavelength.
    • 一种用于波分复用通信的光解复用器/多路复用器包括:用于照射包含不同波长的光波的球面波的光照射单元; 用于分别接收解复用的光波的不同波长的光纤; 用于接收球面波并将球面波转换成平行波的转换透镜; WDM滤波器用于选择和反射平行波中的光波并传输残余光波; 引导透镜,用于接收由WDM滤光器反射的光波,会聚并将光传输到光纤; 以及用于接收光波并将光波反射向WDM滤光器的反射镜。 平行波从转换透镜前进,被WDM滤波器选择和反射,反射回到WDM滤波器,再次被引导透镜收敛并被每个波长由光纤解复用。
    • 7. 发明授权
    • Thermoreversible recording material, thermoreversible recording medium
and recording method
    • 热可逆记录材料,热可逆记录介质和记录方法
    • US5310611A
    • 1994-05-10
    • US953785
    • 1992-09-30
    • Yutaka OkabeYoichi NishiokaYukihisa Okada
    • Yutaka OkabeYoichi NishiokaYukihisa Okada
    • B41M5/36B41M5/26
    • B41M5/363Y10S430/146
    • A thermoreversible recording material having its transparency changed in accordance with its thermal history, in particular the rate of cooling and the temperature to which it has been heated, comprises a matrix material and an organic compound of low molecular weight, wherein the matrix material comprises polyvinyl acetal, and the organic compound of low molecular weight comprises a saturated carboxylic acid or derivative thereof. The matrix material may further contains a material selected from a group consisting of epoxy resin, phenol resin, epoxy compound, aldehyde compound and isocyanate compound. A thermoreversible recording medium comprising the above thermoreversible recording material may be selectively heated by a thermal head or the like to record visual information. The visual information may be erased by heating the medium and cooling it slowly.
    • 具有根据其热历史,特别是冷却速度和其加热温度的透明度变化的热可逆记录材料包括基质材料和低分子量的有机化合物,其中基质材料包括聚乙烯 缩醛,低分子量的有机化合物包括饱和羧酸或其衍生物。 基质材料还可以含有选自环氧树脂,酚醛树脂,环氧化合物,醛化合物和异氰酸酯化合物的材料。 包含上述热可逆记录材料的热可逆记录介质可以通过热敏头等选择性加热,以记录视觉信息。 可以通过加热介质并缓慢冷却来消除视觉信息。