A calcium atomic beam has been decelerated by a single extended-cavity diode laser, frequency doubled to 423 nm. A potassium niobate crystal is placed in an external power buildup cavity, and the second-harmonic laser beam, counterpropagating with the atomic beam, is tuned into resonance with the strong <sup>1</sup><i>S</i><sub>0</sub>–<sup>1</sup><i>P</i><sub>1</sub> transition of calcium. For input power of 78 mW at 846 nm, we generate 22 mW at 423 nm after correction for the reflectivity of our cavity output coupler. To keep the atoms always in resonance during the deceleration process, the Zeeman tuning technique was used.
© 1999 Optical Society of America
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.2020) Lasers and laser optics : Diode lasers
(140.3320) Lasers and laser optics : Laser cooling
(190.2620) Nonlinear optics : Harmonic generation and mixing
Germano Woehl, Jr., Guilherme de Andrade Garcia, Flavio Caldas Cruz, Daniel Pereira, and Artemio Scalabrin, "Deceleration of a Calcium Atomic Beam with a Frequency-Doubled Diode Laser," Appl. Opt. 38, 2540-2544 (1999)