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2090 nm 200 W Peak Power 50 ns Pulsed PM Ho-Doped Fiber Amplifier Pumped at 1860 nm
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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… Click to show full 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.
