A novel method of evaluating large mode area fiber design by brightness factor*
Zhang Hai-Taoa)†, Chen Danb), Ren Hai-Cuia), Yan Pinga), Gong Ma-Lia)‡
       
Calculated modal intensity profiles of an LPF ( d / Γ = 0.3, d core = 51 μm;), the corresponding overlap of the mode field with the core area and the propagation losses (ordered by decreasing doping overlap).