“PHAROS” is built upon traditional chirped pulse amplification technique, employing seed oscillator, regenerative amplifier and pulse stretcher/compressor modules. Kerr lens mode-locked oscillator, incorporating chirped mirrors for compensation of group velocity dispersion, typically delivers >700 mW output with sub-80 fs pulse duration. Regenerative amplifier is based on Yb:KGW lasing medium. Amplifier is non-collinearly pumped by one or two (respectively 4W or 6W “PHAROS”) Light Conversion proprietary design high-brightness diode bar modules delivering up to 60 W of power. Conventional low loss BBO Pockels cells are used in regenerative amplifier and optional pulse picker at repetition rates up to 200 kHz (extendable to 1 MHz). The stretcher/compressor module is based on single high efficiency transmission grating with excellent power handling capability. Timing electronics, controls the operation of Pockels cells and monitors performance of the whole system. Separate modules of “PHAROS” system are interlinked by a set of industrial CAN bus microcontrollers. Operating parameters are adjustable via remote control module or external PC connected via USB interface.
Standard \"PHAROS\" system delivers pulse energies up to 0.3 mJ and pulse duration of 280 fs, somewhat varying with the repetition rate due to change in saturation level of the laser crystal. Short Pulse model PHAROS-SP incorporates modified resonator cavity with increased amplification bandwidth consequently delivering up to 1 mJ pulse energies and reduced pulses duration of 180 fs.