Experimental Study on Pumping Characteristics of High Repetition Frequency High Peak Power End-pumped Nd:YAG Bonded Microchip Laser

摘要

With the rapid development of Nd:YAG laser, passively Q-switched microchip Nd:YAG laser has become more and more important for its unique performance, such as compact structure, high pumping efficiency and nice thermal characteristic. By choosing different thickness of Cr4+:YAG piece, passively Q-switched microchip laser can achieve 1064 nm laser with narrow pulse width, high repetition frequency and high peak power based on a micro piece. In this paper, we build a passively Q-switched Nd:YAG microchip laser system. Based on this experimental structure, we fully study the pumping characteristics of end-pumped microchip laser and obtain the unsymmetrical characteristics along optical axis. From the experiments and discussion, for the passive Q-switched microchip laser, we attain an efficient method to control the output parameters as A-O switched lasers by changing pumping characteristics. Additionally, we also gain an important method to achieve high peak power high repetition frequency 1064 nm laser using diode end -pumped passively Q-switched Nd:YAG microchip laser. Thus, the applications of microchip lasers will become more practicable and more general-purpose.