Abstract

A new method of using thermally induced second-harmonic output depolarization to determine the fractional thermal loading of a diode-pumped Nd:YVO<sub>4</sub> laser is proposed. The experimental results show that the fraction of the green output power polarized along the extraordinary axis of a KTP crystal, <i>f</i><sub>e</sub> , is an oscillatory function of the absorbed pump power. The fractional thermal loading can be determined by measurement of the difference in the absorbed pump power between the peaks of <i>f</i><sub>e</sub> .

© 1998 Optical Society of America

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