Mitigation of stimulated Raman scattering in high power fiber lasers using transmission gratings

Heck M, Bock V, Kraemer RG, Richter D, Goebel TA, Matzdorf C, Liem A, Schreiber T, Tuennermann A, Nolte S (2018)

Publication Type: Conference contribution

Publication year: 2018

Journal

Proceedings of SPIE Society of Photo-optical Instrumentation Engineers (SPIE)

Publisher: SPIE

Book Volume: 10512

Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering

Event location: San Francisco, CA, USA

ISBN: 9781510615090

DOI: 10.1117/12.2289511

Abstract

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.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Fraunhofer-Institut für Angewandte Optik und Feinmechanik (IOF) / Fraunhofer Institute for Applied Optics and Precision Engineering DE Germany (DE)

How to cite

APA:

Heck, M., Bock, V., Kraemer, R.G., Richter, D., Goebel, T.A., Matzdorf, C.,... Nolte, S. (2018). Mitigation of stimulated Raman scattering in high power fiber lasers using transmission gratings. In Ingmar Hartl, Adrian L. Carter (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. San Francisco, CA, USA: SPIE.

MLA:

Heck, Maximilian, et al. "Mitigation of stimulated Raman scattering in high power fiber lasers using transmission gratings." Proceedings of the Fiber Lasers XV: Technology and Systems 2018, San Francisco, CA, USA Ed. Ingmar Hartl, Adrian L. Carter, SPIE, 2018.

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