Title :
Ultrahigh-sensitivity self-mixing laser Doppler velocimetry with laser-diode-pumped microchip LiNdP/sub 4/O/sub 12/ lasers
Author :
Kawai, Ryoji ; Asakawa, Yusuke ; Otsuka, Kenju
Author_Institution :
Dept. of Appl. Phys., Tokai Univ., Kanagawa, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
A self-mixing laser Doppler velocimetry (LDV) has been demonstrated with laser-diode-pumped microcavity LiNdP/sub 4/O/sub 12/ lasers. The feedback signal required for a usable measurement without using photon-correlation techniques was <1 photon per Doppler-beat cycle. An enhancement of LDV signals by resonant excitations of relaxation oscillations has been performed.
Keywords :
Doppler measurement; laser cavity resonators; laser feedback; laser velocimetry; lithium compounds; micro-optics; micromechanical resonators; neodymium; optical correlation; optical pumping; sensitivity; solid lasers; Doppler-beat cycle; LDV signals; LiNdP/sub 4/O/sub 12/; feedback signal; laser-diode-pumped microcavity LiNdP/sub 4/O/sub 12/ lasers; laser-diode-pumped microchip LiNdP/sub 4/O/sub 12/ lasers; photon-correlation techniques; relaxation oscillations; resonant excitations; ultrahigh-sensitivity self-mixing laser Doppler velocimetry; Frequency; Intensity modulation; Laser beams; Laser feedback; Laser velocimetry; Light scattering; Microchip lasers; Optical scattering; Particle scattering; Resonance light scattering;
Journal_Title :
Photonics Technology Letters, IEEE
