Optimum coupling for intracavity second harmonic generation

Author(s): R. Polloni ; O. Svelto
Sponsor(s): IEEE Lasers and Electro-Optics Society
Publisher: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 1 September 1968
Volume: 4
Page(s): 528 - 530
ISSN (Paper): 0018-9197
ISSN (Online): 1558-1713
DOI: 10.1109/JQE.1968.1075384



The optimum coupling for intracavity second harmonic generation has been theoretically studied. It has been shown that, both for a four- and three-level laser, one can get as much power at the second harmonic wavelength as that which can be obtained at the laser wavelength. It is also shown that, for both cases, an optimum value forlw/w_{0}exists, wherelis the nonlinear crystal length, andwand w0are the spot sizes of the laser beam, respectively, in the laser material and in the nonlinear crystal.