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Wavelength measurement by Fourier analysis of interference fringes through a plane parallel plate

机译:通过平面平行板的干涉条纹傅里叶分析的波长测量

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摘要

When a diverging laser beam passed through a plane parallel glass plate, interference fringes were observed; analysis of these fringes provided accurate estimation of the source wavelength. The fringes had a unique angular range of uniform fringe density. Fourier transform of the fringes in this range directly provided wavelength information. Reference lasers were used to establish a calibration between the fringe density and wavenumber, with which we estimated the wavelength of a test laser. An accuracy of 4.5 x 10(-5) was obtained, which is better than that of conventional grating spectrometers, while providing a much broader free spectral range. Our method has unique features, such as extreme simplicity of the setup, fast analysis, and low cost, which are great advantages in practical wavelength meter applications. (C) 2017 Optical Society of America
机译:当发散激光束通过平面平行玻璃板时,观察到干涉条纹; 对这些边缘的分析提供了对源波长的精确估计。 条纹具有独特的角度范围的均匀条纹密度。 在此范围内的傅里叶变换直接提供波长信息。 参考激光器用于建立边缘密度和波数之间的校准,我们估计了测试激光的波长。 获得4.5×10(5)的精度,比传统光栅光谱仪更好,同时提供更广泛的自由光谱范围。 我们的方法具有独特的功能,如设置,快速分析和低成本的极端简单,在实际波长仪表中具有很大的优势。 (c)2017年光学学会

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  • 来源
    《Applied optics》 |2017年第35期|共6页
  • 作者单位

    Pusan Natl Univ Dept Phys Busan 609735 South Korea;

    Pusan Natl Univ Dept Phys Busan 609735 South Korea;

    Pusan Natl Univ Dept Phys Busan 609735 South Korea;

    Pusan Natl Univ Dept Phys Busan 609735 South Korea;

    Korea Univ Sci &

    Technol UST KRISS &

    Sci Measurement Div Phys Metrol 217 Gajeong Ro Yuseong Gu Daejeon 305340 South Korea;

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  • 正文语种 eng
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