Fig. 2
From: 2.05 μm high-energy thulium-doped fibre amplifier based on backward pumping

Single pulse shape of the laser output from the main oscillator stage (20 ns/div). (a) 5 kHz; (b) 10 kHz; (c) 15 kHz; (d) 20 kHz.
From: 2.05 μm high-energy thulium-doped fibre amplifier based on backward pumping
Single pulse shape of the laser output from the main oscillator stage (20 ns/div). (a) 5 kHz; (b) 10 kHz; (c) 15 kHz; (d) 20 kHz.