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    • 3. 发明授权
    • Optical delay element
    • 光延迟元件
    • US07242839B2
    • 2007-07-10
    • US11086282
    • 2005-03-23
    • Atsushi SakaiIkuo KatohHiroyoshi FunatoToshihiko Baba
    • Atsushi SakaiIkuo KatohHiroyoshi FunatoToshihiko Baba
    • G02B6/10
    • G02B6/1225B82Y20/00
    • An optical delay element including a photonic crystal line defect optical waveguide is disclosed that has a large group refractive index and has small or nearly constant wavelength dispersion of the group refractive index in a wide wavelength region for practical use. The optical delay element includes a line defect optical waveguide formed in a photonic crystal structure, and the volume of the line defect optical waveguide is less than the volume of a single line defect optical waveguide. Thereby, the waveguide band of the line defect optical waveguide has two zero points in the third order dispersion curve of the line defect optical waveguide, and the sign of the third order dispersion curve is inverted near the zero points. Therefore, the waveguide band of the line defect optical waveguide is modified, and this enables expansion of the wavelength region having a large group refractive index, small wavelength dispersion of the group refractive index, and small wavelength dispersion of the speed of optical pulses.
    • 公开了具有大的组折射率的光子晶体线缺陷光波导的光延迟元件,并且在实际使用的宽波长区域中具有小或几乎恒定的组折射率的波长色散。 光延迟元件包括以光子晶体结构形成的线缺陷光波导,线缺陷光波导的体积小于单线缺陷光波导的体积。 因此,线缺陷光波导的波导带在线缺陷光波导的三阶色散曲线中具有两个零点,三阶色散曲线的符号在零点附近反转。 因此,线缺陷光波导的波导带被修改,能够扩大组折射率较大的波长区域,组折射率的小波长色散和光脉冲速度的小波长色散。
    • 8. 发明授权
    • Optical control element
    • 光控元件
    • US07123804B2
    • 2006-10-17
    • US10994369
    • 2004-11-23
    • Toshihiko BabaDaisuke Mori
    • Toshihiko BabaDaisuke Mori
    • G02B6/10
    • G02B6/1225B82Y20/00
    • An optical control element is disclosed that can be made small and has a low loss, and is able to provide group speed control and wavelength dispersion of short light pulses. The optical control element is formed from a photonic crystal, and includes a first portion having a first refraction index in the photonic crystal, a second portion having a second refraction index lower than the first refraction index, and a refraction-index-distributed type defect wave guide. A difference effective refraction indexes between the first portion and the second portion near the refraction-index-distributed type defect wave guide, changing continuously or stepwise along a wave guiding direction of the refraction-index-distributed type defect wave guide.
    • 公开了一种光学控制元件,其可以制造得较小并且具有低损耗,并且能够提供组合速度控制和短光脉冲的波长色散。 光控制元件由光子晶体形成,并且包括在光子晶体中具有第一折射率的第一部分,具有低于第一折射率的第二折射率的第二部分和折射率分布型缺陷 波导。 在折射率分布型缺陷波导附近的第一部分和第二部分之间的有效折射率差异沿着折射率分布型缺陷波导的波导方向连续或逐步变化。
    • 9. 发明申请
    • Optical control device
    • 光控装置
    • US20060110116A1
    • 2006-05-25
    • US11258923
    • 2005-10-27
    • Atsushi SakaiIkuo KatohToshihiko Baba
    • Atsushi SakaiIkuo KatohToshihiko Baba
    • G02B6/10
    • G02B6/1225B82Y20/00
    • An optical control device includes a photonic crystal and a line-defect waveguide formed in the photonic crystal wherein the optical control device is capable of guiding, through the line-defect waveguide, a light having a wavenumber larger than a wavenumber corresponding to an anti-intersection of an even-mode band and an odd-mode band, the even-mode band and odd-mode band being a waveguide band of the line-defect waveguide, wherein the even-mode band of the line-defect waveguide includes two or more inflection points in a wavenumber region larger than a wavenumber corresponding to an intersection of the even-mode band and said odd-mode band, the optical control device guiding a light having a frequency in the vicinity of the inflection point.
    • 光控制装置包括形成在光子晶体中的光子晶体和线缺陷波导,其中光控制装置能够通过线缺陷波导引导波数大于对应于反射波的波数的波, 偶模式频带和奇数模式频带的交点,偶模频带和奇模频带是线缺陷波导的波导带,其中线缺陷波导的偶模频带包括两个或 在比对应于偶模式频带和奇数模式频带的交点的波数更大的波数区域中的更多拐点,该光学控制装置引导具有在拐点附近的频率的光。