Abstract
Compact, inexpensive laser sources in the 2-4 μm wavelength region are of growing interest for applications in environmental detection of trace gases as well as medical diagnostics, process control and combustion analysis. Many organic compounds, including hazardous pollutants, have characteristic absorption spectra in this region. Although external cavity diode lasers (ECDLs) are commercially available from 0.6 μm to 1.6 μm 1, 2, they have not yet made it into the 2 μm wavelength range. Others have recently demonstrated tunability in an external cavity at 3.3 μm3 which was not continuous or single mode. We present room temperature operation of single longitudinal and single spatial mode, external cavity tunable diode lasers operating around 2 μm. We also present high-resolution absorption measurements of CO2 over the 250 cm−1 laser tuning range.
© 1998 Optical Society of America
PDF ArticleMore Like This
R. M. Mihalcea, D. S. Baer, and R. K. Hanson
LWB.1 Laser Applications to Chemical and Environmental Analysis (LACSEA) 1998
G.W. Switzer and J.L. Carlsten
CTuG4 Conference on Lasers and Electro-Optics (CLEO:S&I) 1998
L. Hsu, L.C. Chi, S.C. Wang, and Ci-Ling Pan
CWF10 Conference on Lasers and Electro-Optics (CLEO:S&I) 1998