High-power single-frequency pulsed laser based on a Yb-doped large-pitch photonic crystal fiber
Journal of the Korean Physical Society(2017)
Abstract
We have developed a high-power single-frequency pulsed fiber laser system utilizing a Yb-doped rod-type large-pitch photonic crystal fiber. The maximal peak power is 33 kW with a 0.4-mJ pulse energy and a 70-MHz linewidth, and the average power is 60 W at a 150-kHz repetition rate. At a higher repetition rate, the average power can be increased to 190 W, which is limited by the onset of transverse-mode instability in the large-pitch photonic crystal fiber. The output beam is linearly polarized and shows a good beam quality with a M 2 value of 1.2.
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Key words
Fiber laser,Single-frequency laser,Pulsed laser
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