RAPID-SCAN PUMP-PROBE SPECTROSCOPY WITH HIGH TIME AND WAVE-NUMBER RESOLUTION - OPTICAL-KERR-EFFECT MEASUREMENTS OF NEAT LIQUIDS

Citation
Mj. Feldstein et al., RAPID-SCAN PUMP-PROBE SPECTROSCOPY WITH HIGH TIME AND WAVE-NUMBER RESOLUTION - OPTICAL-KERR-EFFECT MEASUREMENTS OF NEAT LIQUIDS, Journal of the Optical Society of America. B, Optical physics, 12(8), 1995, pp. 1500-1510
Citations number
44
Categorie Soggetti
Optics
ISSN journal
07403224
Volume
12
Issue
8
Year of publication
1995
Pages
1500 - 1510
Database
ISI
SICI code
0740-3224(1995)12:8<1500:RPSWHT>2.0.ZU;2-F
Abstract
A system for the rapid-scan (RS) acquisition of time-resolved nonlinea r spectroscopic signals, capable of femtosecond resolution over a rang e of tens of picoseconds, is presented. Operationally, the system is b ased on a magnetically driven, commercially available velocity transdu cer that continuously scans a probe delay line relative to a fixed del ay line while data are recorded on the fly and in real time. A simple calibration and data time-scale linearization are carried out and test ed on optical-heterodyne-detected optical-Kerr-effect measurements. Th ese results are compared with data acquired with a detection system th at is based on a stepped delay-line lock-in amplifier. It is found tha t the RS system is favorable in several areas of signal acquisition, i ncluding signal-to-noise ratio, acquisition time, spectral resolution in the Fourier-transformed data, and immunity to artifacts such as bas eline distortions.