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    • 2. 发明授权
    • Solid type polarization maintaining fiber and apparatus
    • 固体型保偏纤维及其设备
    • US07177512B2
    • 2007-02-13
    • US11239788
    • 2005-09-29
    • George Edward BerkeyXin ChenJoohyun KohMing-Jun LiDaniel Aloysius Nolan
    • George Edward BerkeyXin ChenJoohyun KohMing-Jun LiDaniel Aloysius Nolan
    • G02B6/024
    • G02B6/03627G02B6/024G02B6/0281G02B6/03694
    • Disclosed is an optical fiber (20) having a centermost laterally-elongated core (30) having a short dimension (a), a long dimension (b) and a first refractive index (n1), a moat (40) surrounding the central laterally-elongated core, the moat (40) having a second refractive index (n2), an outer dimension (c) and an outer dimension (d), and a cladding (50) surrounding the moat (40), the cladding (50) having a third refractive index (n3), wherein n1>n3>n2, a ratio of b/a is between 1.5 and 5.0, and a ratio of d/a is between 2.0 and 7.0. The fiber exhibits polarization maintaining properties in a PMB situated below (i.e., at shorter wavelength than SPB), such that beat length normalized to 1550 nm wavelength is preferably less than 10 mm. The fiber (20) may be coupled to optical components in apparatus where single polarization or polarization maintaining properties are desired.
    • 公开了一种光纤(20),其具有具有短尺寸(a),长尺寸(b)和第一折射率(n <1> 1)的中心横向细长芯部(30), 围绕中央横向细长的芯的护城河(40),护城河(40)具有第二折射率(n 2/2),外部尺寸(c)和外部尺寸(d),以及 围绕护城河(40)的包层(50),包层(50)具有第三折射率(n 3/3),其中n 1 n 3 < / SUB >> n 2,b / a的比例在1.5和5.0之间,d / a的比率在2.0和7.0之间。 纤维在位于低于(即在比SPB更短的波长)的PMB中表现出极化保持性能,使得标准化为1550nm波长的拍子长度优选小于10mm。 光纤(20)可以耦合到需要单极化或偏振保持特性的装置中的光学部件。
    • 4. 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。