Abstract

We demonstrated an efficient and compact, diode-pumped passively Q-switched Nd:YVO 4 laser operation at 1.064 μm wavelength with high repetition rate, using Cr 4+:YAG as saturable absorber, formed with a simple flat–flat resonator. The maximum CW output power of 4.05 W was obtained at the incident pump power of 8 W . For Q-switched operation, the maximum average output power was measured to be 1.4 W with the corresponding repetition rate of 200 kHz , the pulse width of 60 ns when the initial transmission of Cr 4+:YAG crystal was 85%. The shortest pulse width of 12 ns , the largest pulse energy of 36 μJ and the highest peak power of 3 kW were obtained when the Cr 4+:YAG crystal with an initial transmission of 60% was used.

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