Abstract
We report a nanosecond-pulse amplification system based on an Yb-doped, 100-μm core,
rod-type photonic crystal fiber. Up to 10W of average power with pulse energy of 1 mJ and peak power
of 450 kWis obtained at the repetition rate of 10 kHz. The high-power nanosecond pulse has a good
pulse shape and spectral characteristics. The usage of rod-type fibers provides a novel structure
for nanosecond pulse amplification.
© 2013 Chinese Optics Letters
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