SUB-SHOT-NOISE LASER-DOPPLER ANEMOMETRY WITH AMPLITUDE-SQUEEZED LIGHT

Authors
LI YQ LYNAM P XIAO M EDWARDS PJ
Citation
Yq. Li et al., SUB-SHOT-NOISE LASER-DOPPLER ANEMOMETRY WITH AMPLITUDE-SQUEEZED LIGHT, Physical review letters, 78(16), 1997, pp. 3105-3108
Citations number
26
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
78
Issue
16
Year of publication
1997
Pages
3105 - 3108
Database
ISI
SICI code
0031-9007(1997)78:16<3105:SLAWAL>2.0.ZU;2-2
Abstract
Amplitude-squeezed light from a quantum-well semiconductor-laser with weak optical feedback from a highly dispersive grating is;employed for laser Doppler anemometry. Up to 2 dB noise reduction below the shot-n oise level is observed with a feedback factor of 1.5 x 10(-4). Enhance d sensitivity is demonstrated in the Doppler measurement of a gas flow velocity with an improvement in the signal to noise ratio of 1.0 dB a bove the shot-noise limit.