Figure 4
From: 2 × 4.5 kW bidirectional output near-single-mode quasi-continuous wave monolithic fiber laser
Experimental results of bidirectional output QCW fiber laser with peak power of 8002 W: (a) variation curves of the output power and O–O efficiency with the pump power; (b) output spectrum; (c) A-end beam quality and profile at maximum output power; (d) B-end beam quality and profile at maximum output power.
