Directly q-switched high power resonator based on XLMA-fibers

摘要

In this paper we present a simple approach to achieving nanosecond pulses from a directly q-switched high-power resonator based on extra-large mode area (XLMA) fibers with a beam quality factor M~2 < 15. An average output power of> 500 W has been demonstrated for repetition frequencies between 50-100 kHz. The resonator consists of a single fiber q-switched with soldered Pockels-cells which exhibit a very high contrast ratio leading to output pulses down to about 10 ns and peak powers up to> 250 kW at 1064 nm wavelength. By using this design instead of a fiber MOPA setup, a cost-effective and less complex system could be implemented.