Title :
Cavity ringdown spectroscopy of NO with a cw single frequency quantum cascade laser
Author :
Kosterev, A.A. ; Malinovsky, A.L. ; Tittel, F.K. ; Gmachl, C. ; Capasso, F. ; Sivco, D.L. ; Baillargeon, J.N. ; Hutchinson, A.L. ; Cho, A.Y.
Author_Institution :
Rice Quantum Inst., Rice Univ., Houston, TX, USA
Abstract :
Summary form only given. Cavity ringdown spectroscopy (CRS) enables the measurements of very weak absorption introduced.into a high-finesse optical cavity. This method is based on measuring a decay time of the cavity mode. In this contribution we shall report the ultrasensitive detection of NO by its fundamental absorption at 5.2 /spl mu/m by CRS technique. A continuous wave quantum cascade distributed feedback (QC-DFB) laser was used as the spectroscopic source.
Keywords :
distributed feedback lasers; gas sensors; infrared spectroscopy; laser frequency stability; nitrogen compounds; quantum well lasers; sensitivity; spectrochemical analysis; spectroscopic light sources; 5.2 micron; CRS technique; NO; cavity ringdown spectroscopy; cw single frequency quantum cascade laser; fundamental absorption; high-finesse optical cavity; intrinsically narrow linewidth; low sensitivity; quantum cascade distributed feedback laser; stable single frequency operation; ultrasensitive detection; Absorption; Distributed feedback devices; Elementary particle vacuum; Frequency; Laser feedback; Mirrors; Optical feedback; Quantum cascade lasers; Spectroscopy; Time measurement;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.948120
