DOPPLER VELOCIMETRY IN A SUPERSONIC JET BY USE OF FREQUENCY-MODULATEDFILTERED LIGHT-SCATTERING

Authors
GRINSTEAD JH FINKELSTEIN ND LEMPERT WR
Citation
Jh. Grinstead et al., DOPPLER VELOCIMETRY IN A SUPERSONIC JET BY USE OF FREQUENCY-MODULATEDFILTERED LIGHT-SCATTERING, Optics letters, 22(5), 1997, pp. 331-333
Citations number
11
Categorie Soggetti
Optics
Journal title
Optics letters → ACNP
ISSN journal
01469592
Volume
22
Issue
5
Year of publication
1997
Pages
331 - 333
Database
ISI
SICI code
0146-9592(1997)22:5<331:DVIASJ>2.0.ZU;2-Q
Abstract
A new nonintrusive velocimetry diagnostic that combines the sensitivit y of frequency-modulated (FM) absorption spectroscopy techniques and t he spectral discrimination afforded by atomic-vapor absorption filters is presented. Doppler-shifted light from a FM Ti:sapphire laser scatt ered from a supersonic flow is imaged through a potassium-vapor cell a nd is detected by FM spectroscopy. The difference between the potassiu m resonance frequency and the laser frequency when the scattered light is in resonance is the flow-induced Doppler shift. (C) 1997 Optical S ociety of America.