Multi-watt diffraction-limited picosecond pulses from a diode-pumped Nd:YVO_4 amplifier with a photorefractive phase conjugate mirror

摘要

We demonstrate >4 W and 7.2 ps output of double-pass Nd:YVO_4 slab amplifier with a photorefractive ring phase conjugate mirror. A double-pass gain of 190 and optical extraction efficient of >20% were obtained. The amplified signal beam exhibits a TEM_(00) profile with beam propagation parameters M_x~2 < 1.4 and M_y~2 < 1.1.