Fig. 7: LR used in fiber oscillator with varying linewidth.
From: Transverse mode coupling in monolithic few-mode fiber laser oscillators
a Spectra of LR with linewidth of 2.1 nm (black line), 1.2 nm (red line), 0.8 nm (blue line), 0.6 nm (green line), 0.2 nm (purple line), HR with linewidth of 4 nm (brown line); b TMI threshold (left y axis) and SRS ratio (right y axis)
