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.File | Dimensione | Formato | |
---|---|---|---|
oeblu2021.pdf
accesso aperto
Tipo:
Versione (PDF) editoriale
Licenza:
Licenza per accesso libero gratuito
Dimensione
4.2 MB
Formato
Adobe PDF
|
4.2 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.