Figure 1
From: High-order mode suppression in double-clad optical fibers by adding absorbing inclusions
Calculated mode field intensity distribution for the DC-fiber design: (a) without an absorbing layer, (b) with an absorbing layer(thickness of 0.53 μm), (c) with the absorbing layer thickness “resonant” for coupling between the LP11 and LP12 modes (0.446 μm).
