Anti-Stokes Raman lasers without inversion
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We describe the propagation dynamics and gain line shape of pulsed, tunable, anti-Stokes Raman lasers without inversion. Analytical expressions for the gain are obtained and evaluated for inhomogeneously broadened atomic media. The inversionless gain, which requires selective pumping of one of two lower atomic states, occurs regardless of the relative populations of these states and vanishes when the atomic populations are in equilibrium. 1997 The American Physical Society.