Abstract

By investigating the rate equations of Q-switched simultaneous dual-wavelength lasers and by using the polarization-dependent emission cross section of a $\mathrm{Nd}:{\mathrm{YAlO}}_3$ laser crystal to balance the equivalent emission cross sections of the dual lasing wavelengths, we have developed a new resonator configuration by introducing a quarter-wave polarization rotator. The two wavelengths exhibit an equal net gain in the laser rod, and the optimal spatial and temporal overlap can be achieved easily for optimal sum-frequency mixing. This configuration has a cavity length that is shorter than in previously used configurations, so it is suitable for operation at high output power and with a high repetition rate with a short thermally determined focal length.

© 2003 Optical Society of America

1079.5- and 1341.4-nm: larger energy from a dual-wavelength Nd:YAlO₃ pulsed laser

H. Y. Shen, W. X. Lin, R. R. Zeng, Y. P. Zhou, G. F. Yu, C. H. Huang, Z. D. Zeng, W. J. Zhang, R. F. Wu, and Q. J. Ye
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