Publica
Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten. Extremely robust femtosecond written fiber Bragg gratings for an ytterbium-doped fiber oscillator with 5 kW output power
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Krämer, R.G.; Möller, F.; Matzdorf, C.; Goebel, T.A.; Strecker, M.; Heck, M.; Richter, D.; Plötner, M.; Schreiber, T.; Tünnermann, A.; Nolte, S. | Optics Letters 45 (2020), Nr.6, S.1447-1450
ISSN: 0146-9592 |
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| Englisch |
| Zeitschriftenaufsatz |
| Fraunhofer IOF () |
Abstract
We present highly robust fiber Bragg gratings (FBGs) in passive large-mode-area fibers for kilowatt fiber laser systems. The gratings were inscribed directly through the fiber coating using near-infrared femtosecond laser pulses and then implemented in an all-fiber ytterbium-doped single-mode oscillator setup reaching up to 5 kW signal output power. The untreated cooled FBGs showed thermal coefficients as low as 1 K kW−1, proving excellent qualification for the implementation into robust high-power fiber laser setups. © 2020 Optical Society of America