Abstract
In this work we presented a compact femtosecond high average power (35 W), high energy (35 uJ) and high pulse repetition rate (1 MHz) laser system based on efficient room-temperature Yb:YAG crystal rod double-pass power amplifier and Yb doped fiber seed laser. High fidelity nearly transform-limited pulses (330 fs) were obtained by using matched dispersion pair of chirped fiber Bragg grating (CFBG) as a pulse stretcher and 4-pass diffraction grating based pulse compressor. Residual dispersion mismatch was compensated by applying linear thermal gradient along CFBG. Presented laser system is a compact and convenient solution for various industrial and scientific applications.
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