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Updated: Aug 18, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Two-channel self-mixing laser Doppler measurement with carrier-frequency-division multiplexing
Kenju Otsuka1, Kazutaka Abe, Natsumi Sano
1Department of Human and Information Science, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan. ootsuka@keyaki.cc.u-tokai.ac.jp
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.

