Title :
Multiplex, continuous-wave spectroscopic sensing with a swept ringdown cavity and optical heterodyne detection
Author :
Orr, B.J. ; He, Y.
Author_Institution :
Dept. of Chem., Macquarie Univ., Sydney, NSW, Australia
Abstract :
Summary form only given. Cavity ringdown (CRD) absorption spectroscopy with continuous-wave (cw) tunable coherent sources is recognised as a convenient, sensitive and precise way to measure very weak optical absorption spectra. We have recently introduced several innovations in CRD technique, with one or more single-mode tunable diode laser (TDL) sources, a rapidly swept ringdown cavity, and a simple optical heterodyne detected (OHD) approach (based on the dynamics of coherent light reflected from such an active optical cavity).
Keywords :
heterodyne detection; infrared spectroscopy; laser cavity resonators; laser modes; laser tuning; measurement errors; semiconductor lasers; spectroscopic light sources; active optical cavity; cavity ringdown absorption spectroscopy; cw tunable coherent sources; multiplex continuous-wave spectroscopic sensing; optical heterodyne detected; optical heterodyne detection; rapidly swept ringdown cavity; reflected coherent light dynamics; single-mode tunable diode laser; swept ringdown cavity; weak optical absorption spectra; Biomedical optical imaging; Diode lasers; Helium; Infrared spectra; Optical mixing; Optical receivers; Optical sensors; Optical transmitters; Spectroscopy; Tunable circuits and devices;
Conference_Titel :
Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-706-7
DOI :
10.1109/CLEO.2002.1034404
