Investigation of the common Q-switching voltage choice in dual-wavelength alternating Q-switched infrared laser

Abstract

A dual-wavelength co-voltage alternating Q-switched infrared laser is demonstrated by combining the voltage-increased and voltage-decreased electro-optic (EO) Q-switched technologies. We experimentally studied the output characteristics of the laser under different common Q-switching voltages. The selection law of the common Q-switching voltage for 1064 nm and 1319 nm dual-wavelength laser is obtained. The results show that the selection of the common Q-switching voltage should be slightly greater than the quarter-wave voltage of 1319 nm laser(1500 V). Otherwise, the threshold of 1319 nm laser will become higher or the difference of maximum single pulse energy between two wavelengths will be greater.