Abstract

The spectra of the $2s–2p$ lithium transitions were studied in an atomic-lithium vapor–argon-gas mixture by a Doppler-free saturation amplitude modulation spectroscopy technique that employs a tunable diode laser. Lamb-dip and crossover signals were highly resolved. The experimental Doppler-free spectra were used in conjunction with a density matrix method to yield parameters of spectroscopic interest. These parameters include line broadening and relaxation rates that are due to collisions between isotopic species and argon atoms. In addition, Doppler-limited spectra were used to determine density, concentration, and temperature of the lithium isotopes.

© 1998 Optical Society of America

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