Sinusoidal frequency modulation on laser diode for frequency stabilization and displacement measurement

•Sinusoidal frequency modulation on a laser diode (LD) is evaluated.•Frequency stabilization of an LD to I2 absorption line near 633nm is attained.•A displacement measuring interferometer using the LD as light source is fabricated. In this paper, we propose the sinusoidal frequency modulation on a l...

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Published inMeasurement : journal of the International Measurement Confederation Vol. 94; pp. 927 - 933
Main Authors Vu, Thanh-Tung, Maeda, Yoshitaka, Aketagawa, Masato
Format Journal Article
LanguageEnglish
Published London Elsevier Ltd 01.12.2016
Elsevier Science Ltd
Subjects
Absorption
Construction costs
Displacement measurement
Frequencies
Frequency modulation
Frequency stabilization
Homodyne interferometer
Iodine
Laser diode
Lasers
Measurement
Semiconductor lasers
Frequency stabilization
Absorption
Homodyne interferometer
Laser diode
Iodine
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Summary:•Sinusoidal frequency modulation on a laser diode (LD) is evaluated.•Frequency stabilization of an LD to I2 absorption line near 633nm is attained.•A displacement measuring interferometer using the LD as light source is fabricated. In this paper, we propose the sinusoidal frequency modulation on a laser diode (LD) to achieve both frequency stabilization of the LD and displacement measurement with a homodyne interferometer. The central frequency of the LD is stabilized to a Doppler broadened absorption line of iodine (I2) molecule near the wavelength of 633nm. The frequency of the LD is modulated across the absorption line and synchronous detection is utilized to detect the absorption signal. A simple and low-cost homodyne displacement-measuring interferometer can be constructed that can attain high measurement resolution.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2015.12.021