High-power Quasi-continuous Wave Operation of Incoherently Combined Yb-doped Fiber Lasers

High-energy, high-power, quasi-continuous wave (QCW) operation of double-clad Yb fiber lasers incorporating an incoherent signal combiner is reported. We constructed four efficient, high-power Yb fiber lasers, each of which produced rectangular pulses at 1080 nm with a pulse energy greater than 15 J...

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Bibliographic Details
Published in:Current optics and photonics 2017, Vol.1 (5), p.525-528
Main Authors: Jeon, Minjee, Jung, Yeji, Park, Jongseon, Jeong, Hoon, Kim, Ji Won, Seo, Hongseok
Format: Article
Language:Korean
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Summary:High-energy, high-power, quasi-continuous wave (QCW) operation of double-clad Yb fiber lasers incorporating an incoherent signal combiner is reported. We constructed four efficient, high-power Yb fiber lasers, each of which produced rectangular pulses at 1080 nm with a pulse energy greater than 15 J, and a pulse duration of 10 ms at a repetition rate of 10 Hz, corresponding to an average power of over 150 W and a peak power of over 1.5 kW for ~200 W of incident pump power at 915 nm. These laser outputs were combined by a homemade incoherent fiber signal combiner with low loss, yielding a maximum peak power of ~6.0 kW in a beam with $M^2{\approx}12.5$. The detailed laser characteristics and prospects for further power scaling in QCW operation are discussed.
ISSN:2508-7266
2508-7274