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Third-harmonic-generation of a diode laser for quantum control of beryllium ions.
Title Third-harmonic-generation of a diode laser for quantum control of beryllium ions.
Authors Carollo, R.A.; Lane, D.A.; Kleiner, E.K.; Kyaw, P.Aung; Teng, C.C.; Ou, C.Y.; Qiao, S.; Hanneke, D.
Journal Opt Express
DOI 10.1364/OE.25.007220
Abstract

We generate coherent ultraviolet radiation at 313 nm as the third harmonic of an external-cavity diode laser. We use this radiation for laser cooling of trapped beryllium atomic ions and sympathetic cooling of co-trapped beryllium-hydride molecular ions. An LBO crystal in an enhancement cavity generates the second harmonic, and a BBO crystal in a doubly resonant enhancement cavity mixes this second harmonic with the fundamental to produce the third harmonic. Each enhancement cavity is preceded by a tapered amplifier to increase the fundamental light. The 36-mW output power of this all-semiconductor-gain system will enable quantum control of the beryllium ions' motion.