High energy oscillator-amplifier with tapered rod-type multicore fiber

Christopher Aleshire; Albrecht Steinkopff; Maximilian Karst; Arno Klenke; Cesar Jauregui; Stefan Kuhn; Johannes Nold; Nicoletta Haarlammert; Thomas Schreiber; Jens Limpert

doi:10.1117/12.2609569

4 March 2022 High energy oscillator-amplifier with tapered rod-type multicore fiber

Christopher Aleshire, Albrecht Steinkopff, Maximilian Karst, Arno Klenke, Cesar Jauregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Author Affiliations +

Proceedings Volume 11981, Fiber Lasers XIX: Technology and Systems; 1198108 (2022) https://doi.org/10.1117/12.2609569
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

In-house fabricated Ytterbium-doped rod-type multicore fibers (MCFs) with 4x4 cores were used to generate and amplify ns-class pulses to energies up to 37 mJ. Amplification was compared using tapered and untapered MCFs with large multimode output cores using a Q-switched MCF oscillator as seed source. The tapered fiber improves beam quality (average M2 = 1.56) while maintaining a large waveguide mode area for suppression of nonlinear effects and increased amplification per unit length. These all-glass MCFs can facilitate energy and power scaling in compact high power coherently combined amplifier systems.

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Citation Download Citation

Christopher Aleshire, Albrecht Steinkopff, Maximilian Karst, Arno Klenke, Cesar Jauregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, and Jens Limpert "High energy oscillator-amplifier with tapered rod-type multicore fiber", Proc. SPIE 11981, Fiber Lasers XIX: Technology and Systems, 1198108 (4 March 2022); https://doi.org/10.1117/12.2609569

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