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Proceedings Paper

Phase-shifting interferometry using a multi-mode blue laser diode
Author(s): Jun Chen; Yoh Tanaka; Suezou Nakadate; Yukihiro Ishii
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Paper Abstract

A phase-shifting interferometry (PSI) using a multi-longitudinal-mode blue laser diode was developed. Since the longitudinal modes of a laser diode are located almost at even interval and changes synchronously with the injection current, by setting an optical path difference between two arms of an interferometer in such a way that makes the contrast of interferogram to be a maximum, the phase shift required for PSI can be obtained by changing the injection current. Moreover, in such a condition, the PSI system works even mode hops occur. Theory and experimental results for measuring the transmitted wavefront of an aspheric DVD pickup lens are presented.

Paper Details

Date Published: 2 February 2009
PDF: 8 pages
Proc. SPIE 7157, 2008 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 715702 (2 February 2009); doi: 10.1117/12.811995
Show Author Affiliations
Jun Chen, Tokyo Polytechnic Univ. (Japan)
Yoh Tanaka, Tokyo Polytechnic Univ. (Japan)
Suezou Nakadate, Tokyo Polytechnic Univ. (Japan)
Yukihiro Ishii, Tokyo Univ. of Science (Japan)


Published in SPIE Proceedings Vol. 7157:
2008 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications
Anbo Wang; YanBiao Liao; AiGuo Song; Yukihiro Ishii; Xudong Fan, Editor(s)

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