Fig. 2: The simulated results of spectra and the variation in TMI threshold corresponding to different LR linewidths.
From: Transverse mode coupling in monolithic few-mode fiber laser oscillators
a Spectra of oscillator with LR linewidth of 0.05 nm. b 0.3 nm. c 1.0 nm, and d variation of TMI threshold with the switching of LRs with different linewidth. Pump power at TMI threshold (right y axis) is denoted by pink dots and is represented by a pink dashed line and signal power is denoted by dark red dots and is represented by dark red dashed line both including their respective error bars. Efficiency is plotted as blue dots and fitted as blue dashed line (left y axis)
