Wavelength modulation detection of water vapor with a vertical cavity surface-emitting laser
- Southwest Sciences, Inc., Ohio Operations, 6837 Main Street, Cincinnati, Ohio 45244 (United States)
- Particle Measuring Systems, 5475 Airport Boulevard, Boulder, Colorado 80301 (United States)
A vertical cavity surface-emitting laser was studied for gas-sensing applications. Properties of the 962-nm laser that were measured include side-mode suppression, wavelength tuning with temperature and current, power versus injection current, and the amplitude noise spectrum. With wavelength modulation spectroscopy, a rms noise level of 2{times}10{sup {minus}4} absorbance units was achieved. The large current tuning range (25 cm{sup {minus}1}) and smaller amplitude modulation (11{percent}/cm{sup {minus}1}) of the vertical cavity laser compare favorably with Fabry{endash}Perot and distributed feedback diode lasers for spectroscopic gas sensing, especially at atmospheric pressure. {copyright} 1997 Optical Society of America
- DOE Contract Number:
- FG03-91ER81211
- OSTI ID:
- 655242
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 6 Vol. 36; ISSN APOPAI; ISSN 0003-6935
- Country of Publication:
- United States
- Language:
- English
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