Abstract

We report the design and performance of a 2 $\mu$ m dual-stage polarization maintaining (PM) holmium-doped fiber amplifier (HDFA) operating in either continuous-wave (CW) or pulsed regime. The amplifier is pumped at 1860 nm, which offers a better efficiency than a 1940 nm pump. In CW regime, we measured more than 1 W of output power at both 2051 nm and 2090 nm signal wavelengths. In pulsed mode, we tested the amplifier over a broad range of pulse widths (50–500 ns) and pulse repetition frequencies (PRFs) (50–1500 kHz). The PM HDFA delivered up to 200 W of peak power and 10 $\mu$ J of pulse energy with an excellent stability, while integrated inside a compact module.

High-power cladding-pumped Tm-doped silica fiber laser with wavelength tuning from 1860 to 2090 nm

W. A. Clarkson, N. P. Barnes, P. W. Turner, J. Nilsson, and D. C. Hanna
Opt. Lett. 27(22) 1989-1991 (2002)

Nanosecond pulsed single-frequency two-stage holmium-doped fiber MOPA at 2054 nm and 2090 nm

Dominik Lorenz, Clément Romano, Marc Eichhorn, and Christelle Kieleck
Appl. Opt. 60(22) F27-F32 (2021)

1  kW peak power, 110  ns single-frequency thulium doped fiber amplifier at 2050  nm

Erik Lucas, Laurent Lombard, Yves Jaouën, Sylvain Bordais, and Guillaume Canat
Appl. Opt. 53(20) 4413-4419 (2014)

25  W 2  μm broadband polarization-maintaining hybrid Ho- and Tm-doped fiber amplifier

Robert E. Tench, Clement Romano, and J.-M. Delavaux
Appl. Opt. 58(15) 4170-4175 (2019)

Sub-50 fs, 0.5 W average power Nd-doped fiber amplifier at 920 nm

Ti-Jian Li, He Sun, Meng Liu, Ai-Ping Luo, Wen-Cheng Xu, and Zhi-Chao Luo
Opt. Lett. 49(1) 57-60 (2024)