Reconfigurable crystal Brillouin laser for linewidth narrowing and microwave spaced frequency combs

Adam O. Sharp; David J. Spence; Richard P. Mildren

doi:10.1117/12.3003584

12 March 2024 Reconfigurable crystal Brillouin laser for linewidth narrowing and microwave spaced frequency combs

Adam O. Sharp, David J. Spence, Richard P. Mildren

Proceedings Volume 12864, Solid State Lasers XXXIII: Technology and Devices; 1286410 (2024) https://doi.org/10.1117/12.3003584
Event: SPIE LASE, 2024, San Francisco, California, United States

Conference Poster

Abstract

We report on a paratellurite (TeO₂) Brillouin laser utilising an etalon as a dichroic input coupler in a three-mirror standing wave cavity. In this free-space crystal Brillouin laser arrangement, the oscillator transitions between two modes to produce either a Brillouin frequency comb (mode one) or cascade-suppressed single laser line output (mode two) by adjustment of the cavity length. In mode one, the cavity is multiply-resonant for pump enhancement and cascaded Stokes orders. In this mode, the generation of a Brillouin frequency comb spanning 104 GHz was demonstrated. In mode two, a singly resonant configuration for only the first Stokes order is selected. We obtain a factor of four reduction in linewidth was measured from the pump seed laser to the Brillouin laser output.

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Adam O. Sharp, David J. Spence, and Richard P. Mildren "Reconfigurable crystal Brillouin laser for linewidth narrowing and microwave spaced frequency combs", Proc. SPIE 12864, Solid State Lasers XXXIII: Technology and Devices, 1286410 (12 March 2024); https://doi.org/10.1117/12.3003584

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