Microresonator-stabilized extended cavity diode laser for supercavity frequency stabilization
Jinkang Lim, Anatoliy A. Savchenkov, Andrey B. Matsko, Shu-Wei Huang,, Lute Maleki, and Chee Wei Wong
TL;DR
This paper presents a compact, cost-effective method for laser frequency stabilization using a crystalline MgF2 whispering gallery mode microresonator, achieving sub-kHz linewidths and tunability within a high-finesse supercavity.
Contribution
It introduces a novel stabilization technique combining microresonators with an extended cavity diode laser for enhanced frequency stability.
Findings
Laser linewidth reduced to sub-kHz levels.
Achieved stable Pound-Drever-Hall error signals.
Demonstrated tunability over a large bandwidth.
Abstract
We demonstrate a simple, compact, and cost-effective laser noise reduction method for stabilizing an extended cavity diode laser to a 3x105 finesse mirror Fabry-P\'erot (F-P) cavity corresponding to resonance linewidth of 10 kHz using a crystalline MgF2 whispering gallery mode microresonator (WGMR). The laser linewidth is reduced to sub-kHz such that a stable Pound-Drever-Hall (PDH) error signal is built up. The wavelength of the pre-stabilized laser is tunable within a large bandwidth covering the high reflection mirror coating of a F-P supercavity.
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