A high-power 626 nm diode laser system for Beryllium ion trapping

作者：Ball H^*; Lee M W; Gensemer S D; Biercuk M J

来源：Review of Scientific Instruments, 2013, 84(6): 063107.

DOI：10.1063/1.4811093

We describe a high-power, frequency-tunable, external cavity diode laser system near 626 nm useful for laser cooling of trapped Be-9(+) ions. A commercial single-mode laser diode with rated power output of 170 mW at 635 nm is cooled to approximate to -31 degrees C, and a single longitudinal mode is selected via the Littrow configuration. In our setup, involving two stages of thermoelectric cooling, we are able to obtain approximate to 130 mW near 626 nm, sufficient for efficient frequency doubling to the required Doppler cooling wavelengths near 313 nm in ionized Beryllium. In order to improve nonlinear frequency conversion efficiency, we achieve larger useful power via injection locking of a slave laser. In this way the entirety of the slave output power is available for frequency doubling, while analysis may be performed on the master output. We believe that this simple laser system addresses a key need in the ion trapping community and dramatically reduces the cost and complexity associated with Beryllium ion trapping experiments.

• 出版日期2013-6