High-pulse-energy passively Q-switched sub-nanosecond MOPA laser system operating at kHz level
Yiping Zhou, Xudong Li, Haobo Xu, Renpeng Yan, Yugang Jiang, Rongwei Fan, Deying Chen
Abstract
A passively Q-switched sub-nanosecond master oscillator power amplifier (MOPA) laser system at 1064 nm has been reported in this paper. The master oscillator was a passively Q-switched YAG/Nd:YAG/Cr 4+ :YAG microchip laser, yielding a pulse energy of 0.14 mJ and a pulse width of ∼490 ps at repetition rates of 500 Hz and 1 kHz. After passing a double-pass side-pumped Nd:YAG amplification system, the pulse energy reached 7.6 mJ and 1.7 mJ at 500 Hz and 1 kHz, respectively. The spatial beam deformation caused by the thermally induced birefringence was investigated numerically and experimentally.
Topics & Concepts
Materials scienceOpticsQ-switchingLaserNanosecondAmplifierPulse repetition frequencyPulse (music)BirefringenceSolid-state laserPulse-width modulationPulse durationOptoelectronicsPower (physics)PhysicsTelecommunicationsDetectorRadarComputer scienceCMOSQuantum mechanicsSolid State Laser TechnologiesLaser Design and ApplicationsAdvanced Fiber Laser Technologies