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1. 发明授权

US06970276B2 Apparatus and method for quasi-phase-matched nonlinear frequency mixing between different transverse width modes 失效
标题翻译：不同横向宽度模式之间的准相位匹配非线性频率混合的装置和方法
公开(公告)号：US06970276B2
公开(公告)日：2005-11-29
申请号：US10444934
申请日：2003-05-22
申请人： Jonathan R. Kurz , Martin M. Fejer
发明人： Jonathan R. Kurz , Martin M. Fejer
IPC分类号： G02B6/12 , G02F1/35 , G02F1/377 , G02B26/00 , G02B6/00
CPC分类号： G02F1/3775 , G02B2006/12107 , G02F1/3534
摘要： An apparatus and method for nonlinear frequency mixing of light waves relying on a nonlinear material having a nonlinear coefficient d and a waveguide fabricated in the nonlinear material. The waveguide is equipped with a quasi-phase-matching (QPM) grating extending along the length of the waveguide and endowed with an asymmetry of the nonlinear coefficient d along the width of the waveguide. The transverse asymmetry is chosen to establish a mode overlap for nonlinear frequency mixing between different transverse width modes of light. The transverse asymmetry can be odd or else neither odd nor even so as to establish mode overlap for frequency mixing between even transverse width modes and odd transverse width modes. The QPM grating can have single or multiple grating stripes that can be staggered, interleaved, angled and otherwise altered to achieve the transverse asymmetry establishing a mode overlap for frequency mixing between even transverse width modes and odd transverse width modes.
摘要翻译：一种依赖于非线性系数d的非线性材料和在非线性材料中制造的波导的光波非线性频率混合的装置和方法。波导配备有沿着波导长度延伸的准相位匹配（QPM）光栅，并且具有沿波导宽度的非线性系数d的不对称性。选择横向不对称以建立不同横向宽度模式之间的非线性频率混合的模式重叠。横向不对称性可以是奇数，也可以是奇数或偶数，以便建立均匀横向宽度模式和奇数横向宽度模式之间的频率混合的模式重叠。 QPM光栅可以具有可以交错，交错，成角度或以其它方式改变的单个或多个光栅条纹，以实现横向不对称性，以建立均匀横向宽度模式和奇数横向宽度模式之间频率混合的模式重叠。

2. 发明授权

US06930821B2 Nonlinear frequency mixer using quasi-phase-matching gratings having beam-modifying patterns 失效
标题翻译：使用具有光束修改图案的准相位匹配光栅的非线性混频器
公开(公告)号：US06930821B2
公开(公告)日：2005-08-16
申请号：US10440490
申请日：2003-05-16
申请人： Jonathan R. Kurz , Martin M. Fejer
发明人： Jonathan R. Kurz , Martin M. Fejer
IPC分类号： G02F1/37 , G02F1/377 , G02F1/39
CPC分类号： G02F1/3775 , G02F2001/372
摘要： A method and a nonlinear frequency mixer employing the method to generate at least one output light from at least one input light with the aid of a quasi-phase-matching (QPM) grating for quasi-phase-matching the input and output light involved in a nonlinear frequency mixing operation such as three-wave mixing, four-wave mixing or other nonlinear operation mediated by a susceptibility of the nonlinear optical material. The QPM grating has a beam-modifying pattern with features for wave front shaping. More specifically, the features shape the wave fronts of the output light by diffraction or phase front shaping to thereby modify its propagation. This modification of propagation can be used to steer, focus, defocusing, split and/or collimate the output light. The features themselves can have various geometric shapes and sizes, even on the order of the wavelength of the output light, and they can include domains exhibiting a nonlinear optical susceptibility χ, such as the second-order susceptibility χ(2), domain edges, and/or spacings between such domains.
摘要翻译：一种采用该方法的方法和非线性频率混合器，用于借助于准相位匹配（QPM）光栅从至少一个输入光产生至少一个输出光，以准相相匹配参与的输入和输出光由非线性光学材料的磁化率介导的三波混频，四波混频或其他非线性运算的非线性频率混合操作。 QPM光栅具有波束修正图案，具有用于波前成形的特征。更具体地，这些特征通过衍射或相位前置成形来形成输出光的波前，从而改变其传播。传播的这种修改可用于引导，聚焦，散焦，分离和/或校准输出光。特征本身可以具有各种几何形状和尺寸，即使在输出光的波长的数量级上，它们也可以包括显示出非线性光学敏感性chi的畴，例如二次磁化率chi（2） / SUP>，域边缘和/或这些域之间的间隔。

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