Abstract

High-resolution absorption spectra within the central maximum of the ν₇ band of C₂H₄ have been recorded using tunable semiconductor lasers. 169 individual transitions have been resolved in three nonoverlapping frequency regions covering approximately 97% of the spectral range from 947.1 to 951.9 cm⁻¹. The frequency splittings between individual transitions are reproducible to ±0.008 cm⁻¹ or better. The problems of scanning an extended frequency range with a multiplicity of diode lasers arise primarily from limited laser-tuning range and the lack of appropriate techniques for precise absolute frequency calibration. The strengths and weaknesses of diode lasers in high-resolution molecular spectroscopy are assessed.

© 1975 Optical Society of America

Tunable Diode Laser High Resolution Spectroscopic Measurements of the ν₂ Vibration of Carbon Dioxide

J. R. Aronson, P. C. von Thüna, and J. F. Butler
Appl. Opt. 14(5) 1120-1127 (1975)

Analysis of the hyperfine structure of the mercury 6³D₃ → 6³P₂ transition*

Mary H. Keirns and Steven D. Colson
J. Opt. Soc. Am. 65(12) 1413-1417 (1975)

High-Resolution Stark Spectroscopy in the ν₄ Band of NH₃ Using a Thin-Film Diode Laser

W. H. Weber, P. D. Maker, K. F. Yeung, and C. W. Peters
Appl. Opt. 13(6) 1431-1434 (1974)

Absolute measurement of very low sodium-vapor densities using laser resonance fluorescence*

W. M. Fairbank, T. W. Hänsen, and A. L. Schawlow
J. Opt. Soc. Am. 65(2) 199-204 (1975)

Low-Resolution Determination of the Strength of the 667-cm⁻¹ CO₂ Band*

C. N. Harward and R. R. Patty
J. Opt. Soc. Am. 58(2) 188-191 (1968)