Photothermal Phase-Modulating Laser Diode Interferometer with High-Speed Feedback Control
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- Zhao, X., Suzuki, T. & Sasaki, O. OPT REV (2002) 9: 13. doi:10.1007/s10043-002-0013-4
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We propose a photothermal phase-modulating laser diode interferometer equipped with a high-speed feedback control system. The CCD camera’s shutter-function raises the modulating frequency, which in turn elicits a higher feedback response, thus enabling us to eliminate nearly all external disturbance. With the recent application of a system purpose-built for discriminating between numerous fringe sequences, we have also reduced processing time.