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
Full Article | PDF ArticleMore Like This
Takayuki Ohtomo, Seiichi Sudo, and Kenju Otsuka
Appl. Opt. 48(3) 609-616 (2009)
Seiichi Sudo, Yoshihiko Miyasaka, Kenju Otsuka, Yohei Takahashi, Tomohiko Oishi, and Jing-Yuan Ko
Opt. Express 14(3) 1044-1054 (2006)
Kenju Otsuka, Kazutaka Abe, Jing-Yuan Ko, and Tsong-Shin Lim
Opt. Lett. 27(15) 1339-1341 (2002)