Research / 2020 / Article / Fig 3

Research Article

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

Figure 3

Measured gain spectra of the RC-EDF-assisted OAM fiber amplifier. Measured gain spectra for (a) OAM+1 and (b) OAM-1 modes versus wavelength with fixed pump power and (c) OAM+1 and (d) OAM-1 modes versus wavelength with fixed input signal power.