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    • 88. 发明授权
    • Optical fiber light source based on third-harmonic generation
    • 基于三次谐波发生的光纤光源
    • US07339721B1
    • 2008-03-04
    • US11712159
    • 2007-02-28
    • George Edward BerkeyMing-Jun LiShenping LiDaniel Aloysius Nolan
    • George Edward BerkeyMing-Jun LiShenping LiDaniel Aloysius Nolan
    • G02F2/02G02B6/036
    • G02F1/3536G02B6/03605G02B6/03644G02F1/365G02F2001/354
    • An optical-fiber-based light source that generates light via third-harmonic (TH) generation is disclosed. The light source includes a pump light source that provides pump light having a fundamental mode of wavelength λP. The light source also includes an optical fiber optically coupled to the pump light source. The optical fiber's core refractive index profile has (i) a central region with a refractive index value Δ1, (ii) a first annular region immediately surrounding the central region and having a refractive index value Δ2, and (iii) a second annular region immediately surrounding the first annular region and having a refractive index value Δ3. The optical fiber satisfies the conditions Δ2 1.2%. The pump light produces TH-generated light having a higher-order mode of wavelength λTH=(1/3)λP and that is outputted at the optical fiber output end. The pump light fundamental mode overlaps the TH-generated-light higher order mode over the length of the optical fiber to provide a conversion efficiency of 1% or greater.
    • 公开了一种通过三次谐波(TH)产生光产生光的基于光纤的光源。 光源包括提供具有波长λ基波模式的泵浦光的泵浦光源。 光源还包括光学耦合到泵浦光源的光纤。 光纤的芯折射率分布具有(i)折射率值为Δ1的中心区域,(ii)直接围绕中心区域并具有折射率值Delta 2 ,和(iii)紧邻环绕第一环形区域并具有折射率值Δ3的第二环形区域。 光纤满足条件ΔΔ2<1>和Δ2<3> 3> 3,并且max {Delta 1/2> 3&lt; 3&gt;&Delta;&Delta; 2&CenterDot;&CenterDot;&CenterDot;&CenterDot;&CenterDot; 泵浦光产生TH产生的光,其具有高阶模式的波长λ=(1/3)λP&lt; P&gt;,并且在光纤输出端输出 。 泵浦光基本模式在光纤长度上与TH生成光高阶模式重叠,以提供1%或更大的转换效率。