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10ns pulses with 9.1mJ energy at 5 kHz repetition rate and in a diffraction-limited output beam are generated by a nanosecond-pulsed fiber amplifier system based on 35μm and 55μm core Yb-doped Chrially-Coupled-Core (CCC) fibers.
Novel chirally-coupled-core (CCC) fibers enabled large-core laser systems operating robustly-singlemode, independently of fiber excitation, splicing and coiling conditions. A variety of high power continuous-wave, nanosecond-pulse and femtosecond-pulse fiber-laser systems have been demonstrated using CCC fibers.
We demonstrate robustly single-mode power scaling in fiber laser systems built using 35-mum core Yb-doped double-clad chirally-coupled-core (CCC) fibers. Up to 250 W have been demonstrated up to date and further power scaling is in progress.
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