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

Volume

11

Issue

6

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

706

Lastpage

708

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.766792

Filename

766792