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

Choonghwan Lee; Heejoo Choi; Jiung Kim; Myoungsik Cha; Jonghan Jin

doi:10.1364/AO.56.009638

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

Choonghwan Lee, Heejoo Choi, Jiung Kim, Myoungsik Cha, Jonghan Jin

Optical Sciences

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

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 × 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.

Original language	English (US)
Pages (from-to)	9638-9643
Number of pages	6
Journal	Applied optics
Volume	56
Issue number	35
DOIs	https://doi.org/10.1364/AO.56.009638
State	Published - Dec 10 2017

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.56.009638

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title = "Wavelength measurement by Fourier analysis of interference fringes through a plane parallel plate",

abstract = "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 × 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.",

author = "Choonghwan Lee and Heejoo Choi and Jiung Kim and Myoungsik Cha and Jonghan Jin",

note = "Funding Information: Funding. National Research Foundation of Korea (NRF) (2016R1D1A3B01006903). Publisher Copyright: {\textcopyright} 2017 Optical Society of America.",

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AU - Lee, Choonghwan

AU - Choi, Heejoo

AU - Kim, Jiung

AU - Cha, Myoungsik

AU - Jin, Jonghan

PY - 2017/12/10

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

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