Phys. Rev. A 62, 023803 (2000) [4 pages]Linewidth narrowing in Brillouin lasers: Theoretical analysisReceived 26 August 1999; revised 10 March 2000; published 14 July 2000 The linewidth narrowing observed in Brillouin fiber ring lasers is studied within the framework of the usual three-wave model of stimulated Brillouin scattering. We show that the phase noise of the pump laser is transferred to the emitted Stokes wave after being strongly reduced and smoothed under the combined influence of the acoustic damping and the cavity feedback. We then derive a simple analytical relation connecting the full width at half maximum of the Stokes linewidth to that of the pump laser. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.62.023803
DOI:
10.1103/PhysRevA.62.023803
PACS:
42.55.-f, 42.65.Es, 42.25.Kb
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