An external cavity 1540-nm diode laser was frequency doubled in a 3-cm-long periodically poled LiNbO3 waveguide doubler with 150% W−1 conversion efficiency, thereby generating more than 3 μW at 770 nm. Second-harmonic light was used to detect and lock to sub-Doppler lines of the 39K D1 transition.
© 1998 Optical Society of America
(120.3940) Instrumentation, measurement, and metrology : Metrology
(130.4310) Integrated optics : Nonlinear
(140.0140) Lasers and laser optics : Lasers and laser optics
(300.6460) Spectroscopy : Spectroscopy, saturation
Ariel Bruner, Ady Arie, Mark A. Arbore, and Martin M. Fejer, "Frequency Stabilization of a Diode Laser at 1540 nm by Locking to Sub-Doppler Lines of Potassium at 770 nm," Appl. Opt. 37, 1049-1052 (1998)