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
Yung-Fu Chen and Hui-Jean Kuo, "Determination of the thermal loading of diode-pumped Nd:YVO4 by use of thermally induced second-harmonic output depolarization," Opt. Lett. 23, 846-848 (1998)