Abstract
A narrow bandwidth tunable semiconductor laser system operating near 780 nm is described. The commercial laser diodes are frequency stabilized by optical feedback from an external, confocal Fabry-Perot resonator. The feedback phase is electronically stabilized to improve the frequency stability. A beat signal with 30 kHz linewidth between two identical, independent systems is recorded. The performance of this system is demonstrated in a laser cooling experiment with rubidium.
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