Phys. Rev. Lett. 83, 4049–4052 (1999)Nondegenerate Parametric Self-Oscillation via Multiwave Mixing in Coherent Atomic MediaReceived 4 March 1999; published in the issue dated 15 November 1999 We demonstrate an efficient nonlinear process in which Stokes and anti-Stokes components are generated spontaneously in a multilevel medium coherently prepared by resonant, counterpropagating fields. A medium of this kind combines large nonlinear gain and efficient intrinsic feedback, thereby allowing for very weak optical fields to induce nonlinear processes. Mirrorless self-oscillation induced by microwatts of light power (nanojoules of pulse energy) is observed. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.4049
DOI:
10.1103/PhysRevLett.83.4049
PACS:
42.65.-k, 42.50.Gy
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