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Proceedings Paper

Coaxial type of self-mixing interferometer equipped with a wavelength stabilizing system
Author(s): Takamasa Suzuki; Tsutomu Irisawa; Kazuhiro Yokoyama; Osami Sasaki
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Paper Abstract

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.

Paper Details

Date Published: 20 June 2002
PDF: 8 pages
Proc. SPIE 4777, Interferometry XI: Techniques and Analysis, (20 June 2002); doi: 10.1117/12.472249
Show Author Affiliations
Takamasa Suzuki, Niigata Univ. (Japan)
Tsutomu Irisawa, Niigata Univ. (Japan)
Kazuhiro Yokoyama, Niigata Univ. (Japan)
Osami Sasaki, Niigata Univ. (Japan)

Published in SPIE Proceedings Vol. 4777:
Interferometry XI: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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