NPN Nonlinear phase nois e
NRZ Non-return-to-zero
NZDF Nonzero dispersion fiber
OCDMA Optical code division multiple access
ODC Optical dispersion compensation
OEQ Optical equalizer
OF Optical filter
OFDM Orthogonal frequency division multiplexing
OOK On/off keying
OSNR Optical signal-to-noise ratio
OTDM Optical time division multiplexing
PASS Phased amplitude-shift signaling
PD Photodiode
PMD Polarization mode dispersion
PolSK Polarization shift keying
PPM Pulse position modulation
PSBT Phase-shaped binary transmission
PSK Phase shift keying
QAM Quadrature amplitude modulation
QM Quadrature modulator
QPSK Quadrature phase shift keying
RF Radio frequency
(R)OADM (Reconfigurable) optical add/drop multiplexer
RZ Return-to-zero
SE Spectral efficiency
SNR Signal-to-noise ...