title: Frequency-modulation spectroscopy with a multimode laser.
abstract: We report the demonstration of FM spectroscopy with a multimode cw laser that in most cases preserves the high sensitivity of FM spectroscopy with a single-mode laser without the stringent alignment requirements. Sensitivity to absorptions as small as 10(-4) can be inferred from our measurements, and the restrictions on modulation frequencies for small sample times are explored.
authors.forename: D E
authors.initials: DE
authors.lastname: Cooper
authors.forename: T F
authors.initials: TF
authors.lastname: Gallagher