Narrow-Linewidth Vertical-Cavity Surface-Emitting Lasers for Oxygen Detection
Abstract
The use of vertical-cavity surface-emitting lasers (VCSEL s) for optical detection of atmospheric oxygen is described. The VCSEL s were custom designed for single-mode emission in the 763-nm wavelength range, with low noise and narrow optical linewidth. Using standard wavelength modulation spectroscopy and a second-harmonic detection scheme with a 1-m air path, we determined an oxygen concentration resolution of 0.2%. Because of its small size, low power dissipation, and good tunability characteristics, the VCSEL promises to be an attractive light source for use in compact, low-cost optical sensor microsystems for trace gas detection.
- Publication:
-
Applied Optics
- Pub Date:
- May 2000
- DOI:
- 10.1364/AO.39.002475
- Bibcode:
- 2000ApOpt..39.2475Z