We demonstrate that two cross-polarized longitudinal modes can have 50% higher conversion efficiency than two parallel-polarized longitudinal modes in a diode-laser-pumped and intracavity frequency-doubled Nd:YVO4 laser when operated under periodic pulse oscillation. Through simulations of the rate equations for primary frequency intensities and gains, we also verify that this effect can be attributed to gain competition and complementary conversion coefficient between second-harmonic and sum-frequency generations.
© 1998 Optical Society of America
Original Manuscript: July 22, 1997
Revised Manuscript: October 14, 1997
Published: April 20, 1998
Sheng-Lung Huang, Fu-Jen Kao, Hung-Sheng Hsieh, and Chu-Szu Hsu, "Polarization-dependent periodic pulse oscillation in a diode-laser-pumped and intracavity frequency-doubled Nd:YVO4 laser," Appl. Opt. 37, 2397-2401 (1998)