Papers › Lasing in the superradiant crossover regime
Lasing in the superradiant crossover regime
Kamanasish Debnath, Yuan Zhang, Klaus Mølmer
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A new class of laser, which harnesses coherence in both light and atoms, is possible with the use of ultra-cold alkaline earth atoms trapped in an optical lattice inside an optical cavity. Different lasing regimes, including superradiance, superradiant and conventional lasing, are distinguished by the relative coherence stored in the atoms and in the cavity mode. We analyze the physics in two different experimentally achievable regions of the superradiant lasing regime. Our calculations confirm the narrow linewidth of superradiant lasing for the doubly forbidden clock transition ³ P₀ →¹ S₀ of strontium-87 atoms. Under strong driving of the dipole-forbidden transition ³ P₁ →¹ S₀ of strontium-88 atoms the superradiant linewidth narrows further due to the coherent excitation of the cavity field.
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