We report the efficient operation of a continuous-wave, single-frequency, diode-pumped Nd:FAP laser at 1.126 μm. When frequency quadrupled, such a laser might be used as a local oscillator for an optical frequency standard based on the single-photon <sup>2</sup><i>S</i><sub>1/2</sub>–<sup>2</sup><i>D</i><sub>5/2</sub> electric quadrupole transition of a trapped and laser-cooled <sup>199</sup>Hg<sup>+</sup> ion. Since the frequencies of the atomic transition and the laser are harmonically related, this scheme helps to simplify the measurement of the <i>S</i>–<i>D</i> clock transition frequency by a phase-coherent chain to the cesium primary frequency standard.
© 1998 Optical Society of America
(020.7010) Atomic and molecular physics : Laser trapping
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(190.4160) Nonlinear optics : Multiharmonic generation
(300.6520) Spectroscopy : Spectroscopy, trapped ion
Flavio C. Cruz, Brenton C. Young, and James C. Bergquist, "Diode-Pumped Nd:FAP Laser at 1.126 µm: A Possible Local Oscillator for a Hg+ Optical Frequency Standard," Appl. Opt. 37, 7801-7804 (1998)