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Sub-kHz-linewidth VECSELs for cold atom experiments
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DOI：10.1364/OE.390982.png)
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Abstract
En 中文
We report and characterize sub-kHz linewidth operation of an AlGaInP-based VECSEL system suitable for addressing the narrow cooling transition of neutral strontium atoms at 689 nm. When frequency-stabilized to a standard air-spaced Fabry-Perot cavity (finesse 1000) via the Pound-Drever-Hall (PDH) technique, it delivers output power >150 mW in a circularly-symmetric single transverse mode with low frequency and intensity noise. The optical field was reconstructed from the frequency noise error signal via autocorrelation and the Wiener-Khintchine theorem, leading to an estimated linewidth of (125 +/- 2) Hz. Optical beat note measurements were performed against a commercial locked laser system and a second, almost identical, VECSEL system resulting in linewidths of 200 Hz and 160 Hz FWHM, respectively. To the best of our knowledge, this is the first demonstration of a VECSEL compatible with the narrowest of lines (few hundred Hz) used for cooling and trapping atoms and ions. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.
Keywords:
FREQUENCY STABILIZATION
LASER SYSTEM
STRONTIUM
NOISE
SPECTROSCOPY
MANIPULATION
CLOCK
PHASE
Journal
IF:
3.3
Papers:
6.1W
Citations:
14.3W