Because the wavelength of a laser diode (LD) has the temperature-sensitivity, in conventional LD interferometers, a temperature control is required to stabilize the wavelength in long-term measurements. We propose a self-mixing laser diode interferometer that has two coaxial measurement arms. Two interference signals are used for the measurement of displacement and wavelength stabilization in our system. As the wavelength is not stabilized thermostatically, but by adjusting current feedback, compensation is simple and response-time minimal. The feedback controls for displacement measurement and wavelength stabilization were implemented on a time-sharing basis. The devise we propose enables us to conduct long-term measurements of microscopic levels of displacement.
内容記述
Interferometry 11: techniques and analysis : 8-10 July 2002 : Seattle, USA. : conference on interferometric techniques and analysis : Jul 2002, Seattle, WA
雑誌名
Proceedings of SPIE - the International Society for Optical Engineering
巻
4777
ページ
49 - 56
発行年
2002-07
出版者
International Society for Optical Engineering, SPIE
ISSN
0277786X
書誌レコードID
AA10619755
DOI
info:doi/10.1117/12.472249
権利
Copyright 2002 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Coaxial type of self-mixing interferometer equipped with a wavelength stabilizing system
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