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Applied Optics

Applied Optics


  • Vol. 44, Iss. 9 — Mar. 21, 2005
  • pp: 1709–1714

Two-channel self-mixing laser Doppler measurement with carrier-frequency-division multiplexing

Kenju Otsuka, Kazutaka Abe, Natsumi Sano, Seiichi Sudo, and Jing-Yuan Ko  »View Author Affiliations

Applied Optics, Vol. 44, Issue 9, pp. 1709-1714 (2005)

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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

Original Manuscript: February 25, 2004
Revised Manuscript: August 24, 2004
Manuscript Accepted: October 26, 2004
Published: March 20, 2005

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)

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