Doubly resonant four-wave mixing has been used with two lasers set for resonance with the two Na D-line transitions to perform elemental analysis with a Na-seeded flame. The method is analogous to phase-conjugation methods where all lasers have the same frequency. Strong saturation effects and dynamic Stark splittings are observed and used to optimize the mixing efficiency. A nonperturbative theory is presented and shown to describe the experimental results.
© 1988 Optical Society of America
Original Manuscript: April 21, 1988
Manuscript Accepted: July 1, 1988
Published: October 1, 1988
Bruce K. Winker and John C. Wright, "Elemental analysis by doubly resonant four-wave mixing in Na-seeded flames," Opt. Lett. 13, 913-915 (1988)