26 February 2018 Mitigation of stimulated Raman scattering in high power fiber lasers using transmission gratings
Author Affiliations +
Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105121I (2018) https://doi.org/10.1117/12.2289511
Event: SPIE LASE, 2018, San Francisco, California, United States
The average output power of fiber lasers have been scaled deep into the kW regime within the recent years. However a further scaling is limited due to nonlinear effects like stimulated Raman scattering (SRS). Using the special characteristics of femtosecond laser pulse written transmission fiber gratings, it is possible to realize a notch filter that mitigates efficiently this negative effect by coupling the Raman wavelength from the core into the cladding of the fiber. To the best of our knowledge, we realized for the first time highly efficient gratings in large mode area (LMA) fibers with cladding diameters up to 400 μm. The resonances show strong attenuation at design wavelength and simultaneously low out of band losses. A high power fiber amplifier with an implemented passive fiber grating is shown and its performance is carefully investigated.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maximilian Heck, Maximilian Heck, Victor Bock, Victor Bock, Ria G. Krämer, Ria G. Krämer, Daniel Richter, Daniel Richter, Thorsten A. Goebel, Thorsten A. Goebel, Christian Matzdorf, Christian Matzdorf, Andreas Liem, Andreas Liem, Thomas Schreiber, Thomas Schreiber, Andreas Tünnermann, Andreas Tünnermann, Stefan Nolte, Stefan Nolte, } "Mitigation of stimulated Raman scattering in high power fiber lasers using transmission gratings", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105121I (26 February 2018); doi: 10.1117/12.2289511; https://doi.org/10.1117/12.2289511

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