[Table of Contents]

Plasma and Fusion Research

Volume 5, S1041 (2010)

Regular Articles

Conceptual Design of a Dispersion Interferometer Using a Ratio of Modulation Amplitudes
Tsuyoshi AKIYAMA, Kazuo KAWAHATA, Shigeki OKAJIMA1) and Kazuya NAKAYAMA1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
1)
Chubu University, 1200, Matsumoto-cho,Kasugai 487-8501, Japan
(Received 5 January 2009 / Accepted 11 May 2009 / Published 26 March 2010)

Abstract

Since a dispersion interferometer is free from mechanical vibrations, it does not need a vibration compensation system even for a probe beam with a short wavelength. This paper describes a new signal processing of the dispersion interferometer using a ratio of modulation amplitudes with a photoelastic modulator. The proposed method is immune to changes in detected signal intensities, thus making the signal processing system simple. Designs of the optical system of the dispersion interferometer for proof of principle, especially specification of a nonlinear optical crystal, are also shown.

Keywords

interferometer, dispersion interferometer, non-linear crystal, photoelastic modulator, CO2 laser

DOI: 10.1585/pfr.5.S1041

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This paper may be cited as follows:

Tsuyoshi AKIYAMA, Kazuo KAWAHATA, Shigeki OKAJIMA and Kazuya NAKAYAMA, Plasma Fusion Res. 5, S1041 (2010).