Publication Date:
2011-08-19
Description:
A generalized theory for optical heterodyne spectroscopy with phase modulated laser radiation is used which allows the calculation of signal line shapes for frequency modulation spectroscopy of Lorentzian gas absorption lines. In particular, synthetic spectral line shapes for both single-tone and two-tone modulation of lead-salt diode lasers are presented in which the contributions from both amplitude and frequency modulations are included.
Keywords:
INSTRUMENTATION AND PHOTOGRAPHY
Type:
Applied Optics (ISSN 0003-6935); 26; 3584-358
Format:
text