High Power Burst-Mode Laser Seeded by an Electro-Optic Q-Switched Hundreds Picosecond Oscillator

We have proposed and experimentally demonstrated a simple, compact hundreds picosecond (ps) burst-mode laser with good beam quality, seeded by a Q-switched microchip laser. The hundreds ps seed pulse was injected into a laser diode (LD) end-pumped electro-optic (EO) Q-switched Nd:YVO4 laser via a partial transmittance plan mirror. During a 20 kHz burst-mode operation, a hundreds ps burst-mode laser with a 19 ns envelope was obtained, delivering a burst energy of up to 0.49 mJ with a sub-pulse width of 741 ps and a sub-pulse interval of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim \; 3.2$ </tex-math></inline-formula> ns. A good beam quality factor was measured to be <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$M^{2}=1.19$ </tex-math></inline-formula>.