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-Pérot 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.

Feng, C., Vidal, S., Robert, P., Bouyer, P., Desruelle, B., Prevedelli, M., et al. (2021). High power continuous laser at 461 nm based on a compact and high-efficiency frequency-doubling linear cavity. OPTICS EXPRESS, 29(17), 27760-27767 [10.1364/OE.433179].

High power continuous laser at 461 nm based on a compact and high-efficiency frequency-doubling linear cavity

Prevedelli, M.;
2021

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-Pérot 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.
2021
Feng, C., Vidal, S., Robert, P., Bouyer, P., Desruelle, B., Prevedelli, M., et al. (2021). High power continuous laser at 461 nm based on a compact and high-efficiency frequency-doubling linear cavity. OPTICS EXPRESS, 29(17), 27760-27767 [10.1364/OE.433179].
Feng, C.-H.; Vidal, S.; Robert, P.; Bouyer, P.; Desruelle, B.; Prevedelli, M.; Boullet, J.; Santarelli, G.; Bertoldi, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/829776
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