High power diffraction-limited fully aperiodic large pitch fiber amplifier for UV laser light

A. Chervet; B. Leconte; R. Dauliat; A. Guillossou; J. Didierjean; K. Wondraczek; R. Jamier; P. Roy

doi:10.1117/12.3001608

13 March 2024 High power diffraction-limited fully aperiodic large pitch fiber amplifier for UV laser light

A. Chervet, B. Leconte, R. Dauliat, A. Guillossou, J. Didierjean, K. Wondraczek, R. Jamier, P. Roy

Proceedings Volume PC12865, Fiber Lasers XXI: Technology and Systems; PC128650R (2024) https://doi.org/10.1117/12.3001608
Event: SPIE LASE, 2024, San Francisco, California, United States

Conference Poster

Abstract

We developed two Ytterbium-doped rod-type effective singlemode fibers based on new hexagonal FA-LPF design, exhibiting MFD of 47μm and 67μm. Both fibers can deliver 150W of 1030nm signal for 250W of pump power, characterized in a MOPA set-up for different nanosecond pulse durations and repetition rate with excellent beam quality (M² ⪅ 1.1). Using the 47μm MFD fiber, TMI threshold has been measured for signal power slightly higher than 200W. Using the 67μm MFD fiber, we performed, through a third harmonic generation, the creation of 51W signal power at 343nm for 8ns temporally square pulse at 400 kHz repetition rate.

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A. Chervet, B. Leconte, R. Dauliat, A. Guillossou, J. Didierjean, K. Wondraczek, R. Jamier, and P. Roy "High power diffraction-limited fully aperiodic large pitch fiber amplifier for UV laser light", Proc. SPIE PC12865, Fiber Lasers XXI: Technology and Systems, PC128650R (13 March 2024); https://doi.org/10.1117/12.3001608

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