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Improved Resolution and Stability in a Dispersion Interferometer Using a Modulation Amplitude Ratio

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 3 September 2010 / Accepted 22 October 2010 / Published 30 November 2010)

Abstract

A dispersion interferometer is immune to mechanical vibrations, which is a great advantage for application to steady-state fusion reactors. This paper describes the performance of a phase-modulated dispersion interferometer with a new phase extraction method using a modulation amplitude ratio.

Copyright (c) 2010 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

dispersion interferometer, nonlinear crystal, photoelastic modulator, CO₂ laser

DOI: 10.1585/pfr.5.047

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References

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This paper may be cited as follows:

Tsuyoshi AKIYAMA, Kazuo KAWAHATA, Shigeki OKAJIMA and Kazuya NAKAYAMA, Plasma Fusion Res. 5, 047 (2010).