27 February 2009 Q-switched hybrid MOPA laser system based on Yb fibre with side pumping by single source
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Abstract
A novel fiber-based Q-switched master-oscillator & power-amplifier system was developed by using non-PM Yb fiber with side pumping by single source. The passive Q-switched system provides for pulse energy up to 110 microjoule at CW 12 W single pump. Duration and repetition rate of generated pulses at 1080 nm can be varied from 280 ns to 1,8 microsecond, and in the range of 45-140 kHz depending on pump power at 980 nm. Design of master oscillator ensures linearly polarized output which remains polarized after passing power amplifier. Maximum stable average output of the system was 5 W and above this value we observed appearance of nonregular giant pulses which were able to initiate supercontinuum generation over 550-1750 nm range in relatively short-length microstructured fibre. For the first time to our knowledge, wideband supercontinuum generation was obtained with microsecond laser system pump. More details and results including applications for materials processing will be presented.
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Sergey Kobtsev, Sergey Kukarin, Yurii Fedotov, "Q-switched hybrid MOPA laser system based on Yb fibre with side pumping by single source", Proc. SPIE 7193, Solid State Lasers XVIII: Technology and Devices, 71932Q (27 February 2009); doi: 10.1117/12.809380; https://doi.org/10.1117/12.809380
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