1. High power continuous laser at 461 nm based on a compact and high-efficiency frequency-doubling linear cavity
- Author
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Feng, Chen-Hao, Vidal, Sébastien, Robert, Paul, Bouyer, Philippe, Desruelle, Bruno, Prevedelli, Marco, Boullet, Johan, Santarelli, Giorgio, and Bertoldi, Andrea
- Subjects
Physics - Optics ,Physics - Atomic Physics - Abstract
A Watt-level continuous and single frequency blue laser at 461 nm is obtained by frequency-doubling an amplified diode laser operating at 922 nm via a LBO crystal in a resonant Fabry-P\'{e}rot cavity. We achieved a best optical conversion efficiency equal to 87\% with more than 1 W output power in the blue, and limited by the available input power. The frequency-converted beam is characterized in terms of long term power stability, residual intensity noise, and geometrical shape. The blue beam has a linewidth of the order of 1 MHz, and we used it to magneto-optically trap $^{88}$Sr atoms on the 5s$^{2}\,^{1}$S$_0$ -- 5s5p$\,^{1}$P$_1$ transition. The low-finesse, linear-cavity doubling system is very robust, maintains the lock for several days, and is compatible with a tenfold increase of the power levels which could be obtained with fully-fibered amplifiers and large mode area fibers., Comment: 8 pages, 4 figures
- Published
- 2021
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