Research / 2020 / Article / Fig 6

Research Article

Amplifying Orbital Angular Momentum Modes in Ring-Core Erbium-Doped Fiber

Figure 6

Simulation results of the RC-EDF-assisted OAM fiber amplifier. (a) Measured refractive index profile and erbium-doping profile of the fabricated RC-EDF. (b) Simulated 3D intensity profiles, 2D intensity profiles, and phase profiles at the cross-section of OAM+1 and OAM-1 modes. (c–f) Simulated mode gain for OAM+1 and OAM-1 modes versus fiber length (c), signal power (d), pump power (e), and wavelength (f).