Brillouin scattering has been measured with a high degree of sensitivity by a system built around a laser-diode-pumped microchip LiNdP<sub>4</sub>O<sub>12</sub> laser. An efficient self-mixing modulation effect that is due to the interference between a lasing field and a weak field fed back from an acousto-optic modulator by means of a phase-conjugate reflection was used. Laser-Doppler velocimetry that can discriminate the direction of motion has been demonstrated.
© 1999 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(190.5040) Nonlinear optics : Phase conjugation
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(290.5830) Scattering : Scattering, Brillouin
Kenju Otsuka, Ryoji Kawai, Yusuke Asakawa, and Takeki Fukazawa, "Highly sensitive self-mixing measurement of Brillouin scattering with a laser-diode-pumped microchip LiNdP4O12 laser," Opt. Lett. 24, 1862-1864 (1999)