Pulse delay time statistics in a superradiant laser with calcium atoms

Abstract

Cold samples of calcium atoms are prepared in the metastable ${}^3$P${}_1$ state inside an optical cavity resonant with the narrow band (375 Hz) ${}^1$S${}_0{\to }^3$P${}_1$ intercombination line at 657 nm. We observe superradiant emission of hyperbolic secant shaped pulses into the cavity with an intensity proportional to the square of the atom number, a duration much shorter than the natural lifetime of the ${}^3$P${}_1$ state, and a delay time fluctuating from shot to shot in excellent agreement with theoretical predictions. Our incoherent pumping scheme to produce inversion on the ${}^1$S${}_0{\to }^3$P${}_1$ transition should be extendable to allow for continuous wave laser operation.

13 pages, 7 Figures

References in corpus (3)

• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• Steering matter wave superradiance with an ultra-narrowband optical cavity
• Semi-classical Dynamics of Superradiant Rayleigh Scattering in a Bose-Einstein Condensate

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