The operation of a room-temperature, continuous-wave, intracavity frequency-doubled Cr<sup>4+</sup>:forsterite laser capable of producing broadly tunable output in the orange-red region of the electromagnetic spectrum is described. Intracavity doubling was achieved in a periodically poled lithium niobate crystal that had gratings with different periods. Tunable second-harmonic output could be obtained between 613 and 655 nm. At a wavelength of 630 nm, intracavity doubling yielded as much as 45 mW of continuous-wave output. To the author’s knowledge, this represents the highest second-harmonic-power generation obtained to date with a continuous-wave Cr<sup>4+</sup>:forsterite laser.
© 2002 Optical Society of America
(140.3600) Lasers and laser optics : Lasers, tunable
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(140.7300) Lasers and laser optics : Visible lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing
Alphan Sennaroglu, "Broadly Tunable Continuous-Wave Orange-Red Source Based on Intracavity-Doubled Cr4+:Forsterite Laser," Appl. Opt. 41, 4356-4359 (2002)