Accession Number : ADA141876
Title : Optical Generation and Detection of Acoustic Pulse Profiles in Gases for Novel Ultrasonic Absorption Spectroscopy.
Descriptive Note : Technical rept.,
Corporate Author : IBM RESEARCH LAB SAN JOSE CA
Personal Author(s) : Tam,A C ; Leung,W P
PDF Url : ADA141876
Report Date : 22 May 1984
Pagination or Media Count : 19
Abstract : We demonstrate a new all-optical, frequency-multiplexed and fast technique for gas-phase ultrasonic absorption spectroscopy. A pulsed laser produces a short-duration acoustic pulse in the gas sample, and the acoustic pulse profiles at two distances are monitored by focused continuous probe beams. Fourier decompositions of these probe deflection signals provide the absorption spectrum, and examples for CO2 + H2O mixture are given Ultrasonic propagation speeds in the MHz regime are also obtained for several gases.
Descriptors : *Absorption spectra, *Ultrasonics, Acoustic waves, Pulsed lasers, Optical detection, Gases, Pulses
Subject Categories : Lasers and Masers
Acoustic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE