Review of Robust Data Exchange Using Optical Nonlinearities

Figure 21

Experimental setup for multichannel DQPSK data exchange. HNLF: highly nonlinear fiber; BPF: band-pass filter; PC: polarization controller; EDFA: erbium-doped fiber amplifier; ISO: isolator; OC: optical coupler; TDL: tunable delay line; MZM: Mach-Zehnder modulator; WSS: wavelength-selective switch; VOA: variable optical attenuator; DLI: delay line interferometer; Tx: transmitter; Rx: receiver.