Abstract

A diode end-pumped doubly Q-switched YVO4/Nd:YVO4 laser has been realized for the first time to our knowledge by using both an electro-optic (EO) modulator and a Cr4+:YAG saturable absorber. A 3.8ns pulse width is generated by this laser under a pump power of 15W at 2kHz, which is obviously compressed in comparison with that of 8.8ns from a single actively EO Q-switched laser. Under the same conditions, peak power values of 174.7 and 93kW are also obtained. A coupled equation is given to theoretically analyze the experimental data. The experimental and theoretical results show that the doubly Q-switched laser has the advantages of a shorter pulse width and higher pulse peak power in contrast with a singly Q-switched laser.

© 2009 Optical Society of America

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