Two-channel self-mixing laser Doppler measurement with carrier-frequency-division multiplexing
Applied Optics, Vol. 44, Issue 9, pp. 1709-1714 (2005)
http://dx.doi.org/10.1364/AO.44.001709
Acrobat PDF (187 KB)
Abstract
We demonstrate real-time two-channel self-mixing laser-Doppler measurement with extreme optical sensitivity using a laser-diode-pumped thin-slice LiNdP4O12 laser. Successful carrier-frequency-division-multiplexed two-channel operations are realized by using one laser, two sets of optical frequency shifters, and a two-channel frequency-modulated-wave demodulation circuit. Simultaneous independent measurements of vibrations of speakers and averaged motions of small Brownian particles in different scattering cells are demonstrated. Self-mixing photon correlation spectroscopy of particle size distributions is also discussed.
© 2005 Optical Society of America
OCIS Codes
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(290.1350) Scattering : Backscattering
(290.5850) Scattering : Scattering, particles
Citation
Kenju Otsuka, Kazutaka Abe, Natsumi Sano, Seiichi Sudo, and Jing-Yuan Ko, "Two-channel self-mixing laser Doppler measurement with carrier-frequency-division multiplexing," Appl. Opt. 44, 1709-1714 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-9-1709
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