Abstract
Line strengths and broadening coefficients for formaldehyde (H2CO) near 3.5 μm were measured at room temperature using a tunable IR diode laser. Because of the extremely narrow linewidth of the laser (≈10−3 cm−1), the transitions were recorded at a resolution limited only by collision and Doppler broadening. The spectral parameters were determined from Voigt line shape fits to R and Q branch rotational–vibrational transitions of the ν5 band between 2867 and 2881 cm−1. Line strength measurements were made on both pure and dilute samples H2CO. Pressure broadening of H2CO lines by N2 was measured in mixtures containing of 0.8–1.2% H2CO.
© 1988 Optical Society of America
Full Article | PDF ArticleMore Like This
S. Lundqvist, J. Margolis, and J. Reid
Appl. Opt. 21(17) 3109-3113 (1982)
Clayton H. Bair and Philip Brockman
Appl. Opt. 18(24) 4152-4162 (1979)
Curtis P. Rinsland, V. Malathy Devi, Mary Ann H. Smith, and D. Chris Benner
Appl. Opt. 27(3) 631-651 (1988)