An optical frequency domain angle measurement method based on second harmonic generation

Astuti, Wijayanti Dwi and Matsukuma, Hiraku and Nakao, Masaru and Li, Kuangyi and Shimizu, Yuki and Gao, Wei (2021) An optical frequency domain angle measurement method based on second harmonic generation. Sensors (Switzerland), 21 (2). 1 – 14. ISSN 14248220

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Abstract

This paper proposes a new optical angle measurement method in the optical frequency domain based on second harmonic generation with a mode-locked femtosecond laser source by making use of the unique characteristic of the high peak power and wide spectral range of the femtosecond laser pulses. To get a wide measurable range of angle measurement, a theoretical calculation for several nonlinear optical crystals is performed. As a result, LiNbO3 crystal is employed in the proposed method. In the experiment, the validity of the use of a parabolic mirror is also demonstrated, where the chromatic aberration of the focusing beam caused the localization of second harmonic generation in our previous research. Moreover, an experimental demonstration is also carried out for the proposed angle measurement method. The measurable range of 10,000 arc-seconds is achieved. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type: Article
Additional Information: Cited by: 11; All Open Access, Gold Open Access, Green Open Access
Uncontrolled Keywords: Angle measurement; Crystals; Femtosecond lasers; Frequency domain analysis; Harmonic analysis; Harmonic generation; Laser pulses; Lithium compounds; Natural frequencies; Niobium compounds; Nonlinear optics; Optical materials; Chromatic aberration; Experimental demonstrations; Measurement methods; Nonlinear optical crystal; Optical frequency domain; Parabolic mirrors; Theoretical calculations; Wide spectral range; Aberrations
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Vocational School
Depositing User: Sri JUNANDI
Date Deposited: 25 Oct 2024 06:40
Last Modified: 25 Oct 2024 06:40
URI: https://ir.lib.ugm.ac.id/id/eprint/8581

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