Tapered-amplified AR-coated laser diodes for Potassium and Rubidium atomic-physics experiments
Robert A. Nyman, Gael Varoquaux, Brice Villier, Delphine Sacchet, Frédéric Moron, Yann Le Coq, Alain Aspect, Philippe Bouyer
Abstract
We present a system of room-temperature extended-cavity grating-diode lasers (ECDL) for production of light in the range 760-790nm. The extension of the tuning range towards the blue is permitted by the weak feedback in the cavity: the diodes are anti-reflection coated, and the grating has just 10% reflectance. The light is then amplified using semiconductor tapered amplifiers to give more than 400mW of power. The outputs are shown to be suitable for atomic physics experiments with potassium (767nm), rubidium (780nm) or both, of particular relevance to doubly-degenerate boson-fermion mixtures.
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