4-channel Coherently Combined Long-term-stable Ultrafast Thulium-doped Fiber CPA

Christian Gaida; Fabian Stutzki; Martin Gebhardt; Tobias Heuermann; Sven Breitkopf; Tino Eidam; Jan Rothhardt; Jan Rothhardt; Jan Rothhardt; Jens Limpert; Jens Limpert; Jens Limpert; Jens Limpert

doi:10.1364/ASSL.2020.AW5A.1

Laser Congress 2020 (ASSL, LAC)
OSA Technical Digest (Optica Publishing Group, 2020),
paper AW5A.1
•https://doi.org/10.1364/ASSL.2020.AW5A.1

4-channel Coherently Combined Long-term-stable Ultrafast Thulium-doped Fiber CPA

Christian Gaida, Fabian Stutzki, Martin Gebhardt, Tobias Heuermann, Sven Breitkopf, Tino Eidam, Jan Rothhardt, and Jens Limpert

Advanced Solid State Lasers 2020

Washington, D.C. United States
13–16 October 2020
ISBN: 978-1-943580-84-2

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C. Gaida, F. Stutzki, M. Gebhardt, T. Heuermann, S. Breitkopf, T. Eidam, J. Rothhardt, and J. Limpert, "4-channel Coherently Combined Long-term-stable Ultrafast Thulium-doped Fiber CPA," in Laser Congress 2020 (ASSL, LAC), P. Schunemann, C. Saraceno, S. Mirov, S. Taccheo, J. Nilsson, A. Petersen, D. Mordaunt, and J. Trbola, eds., OSA Technical Digest (Optica Publishing Group, 2020), paper AW5A.1.

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Abstract

We present the first coherently combined, thulium-doped fiber CPA delivering >100 W average-power and simultaneously >1 GW of peak-power. Incorporating four amplifier channels the laser delivers pulses with >228 µJ energy and <120 fs duration at 1940 nm center wavelength. Excellent long-term stability is achieved with an average power fluctuation of <0.5% RMS over >48 hours – ideal prerequisites for next-generation industrial and scientific applications.

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