Abstract

In this Letter, we propose and realize a novel concept for a high-peak-power highly efficient fiber amplifier in the 1.55 µm spectral range. The amplifier is based on the simultaneous utilization of Er-doped, Yb-free, and Er-Yb codoped large-mode-area fibers spliced together. Using this approach, we demonstrate the amplification of single-frequency 160 ns pulses at 1554 nm to a peak power of 3.7 kW with a pump-to-signal conversion efficiency of 23.6% relative to the launched multimode pump power at 976 nm.

© 2020 Optical Society of America

Highly efficient Er/Yb-codoped fiber amplifier with an Yb-band fiber Bragg grating

Qun Han, Yunzhi Yao, Yaofei Chen, Fangchao Liu, Tiegen Liu, and Hai Xiao
Opt. Lett. 40(11) 2634-2636 (2015)

All-fiber, single-frequency, and single-mode Er³⁺:Yb³⁺ fiber amplifier at 1556  nm core-pumped at 1018  nm

Omar de Varona, Michael Steinke, Jörg Neumann, and Dietmar Kracht
Opt. Lett. 43(11) 2632-2635 (2018)

Efficient single-mode 976 nm amplifier based on a 45 micron outer diameter Yb-doped fiber

Leonid Kotov, Valery Temyanko, Svetlana Aleshkina, Mikhail Bubnov, Denis Lipatov, and Mikhail Likhachev
Opt. Lett. 45(15) 4292-4295 (2020)

302 W single-mode power from an Er/Yb fiber MOPA

Turghun Matniyaz, Fanting Kong, Monica T. Kalichevsky-Dong, and Liang Dong
Opt. Lett. 45(10) 2910-2913 (2020)

Characterization of sub-nanosecond pulsed laser amplification with Er:Yb co-doped phosphate glass fibers

Omri Moschovitz, Nadia G. Boetti, Diego Pugliese, Duccio Gallichi-Nottiani, Daniel Milanese, Davide Janner, and Amiel A. Ishaaya
Opt. Lett. 45(18) 5291-5294 (2020)