Abstract

Fine frequency tuning of the deep-ultraviolet single-mode coherent light at 252nm was conducted through the PID feedback system automatically by changing the temperature of a β-BaB2O4 (BBO) crystal in a doubly resonant external cavity for the sum-frequency mixing of 373 and 780nm light. The temperature-dependent frequency tuning rate is 19.3MHzK1, which is sufficiently fine to realize the laser cooling of neutral silicon atoms because the natural width of the laser cooling transition is 28.8MHz.

© 2006 Optical Society of America

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