Research / 2020 / Article / Fig 5

Research Article

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

Figure 5

Measured BER performance of single OAM mode carrying a 10-Gbaud QPSK/16-QAM signal under different input signal power and launched pump power. (a, c) Measured BER versus received OSNR of single OAM+1 and OAM-1 modes carrying 10-Gbaud QPSK (a) and 16-QAM (c) signal under different input signal power with the pump power fixed at 550 mW and the signal wavelength at 1550 nm. (b, d) Measured BER versus launched pump power with the input signal power fixed at -15 dBm for OAM+1 and OAM-1 modes carrying 10-Gbaud QPSK (b) and 16-QAM (d) signal.