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Applied Physics Letters

Resonant self-pumped phase conjugation in cesium vapor at 0.85 μm

Celestino J. Gaeta, Juan Francisco Lam

Published May 20, 1991• 4 citations
Publisher

Abstract

We report the first observation of resonant self-pumped phase conjugation at diode laser wavelengths. A phase conjugate reflectivity of 0.01%, and a cw threshold intensity of 75 W/cm2 were measured.
DOI
10.1063/1.104933

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We report our first results on the frequency control of an AlGaAs laser diode by resonant phase-conjugate reflection from an atomic rubidium vapor. When the electrical feedback technique is used, the Allan variance reaches a flicker floor such that sigma(y)(2)(tau) = 1.6 x 10(-19) tau(0) for tau > 1s. We also demonstrate that laser frequency locking can be achieved by using the phase-conjugate reflection directly as a resonant optical feedback. This approach leads to a self-controlled optical frequency standard at 780 nm.