Coherent spectral amplitude coded label detection for DQPSK payload signals in packet-switched metropolitan area networks
We report on an experimental demonstration of a frequency swept local oscillator-based spectral amplitude coding (SAC) label detection for DQPSK signals after 40km of fiber transmission. Label detection was performed for a 10.7Gbaud DQPSK signal labeled with a SAC label composed of four-frequency tones with 500MHz spectral separation. Successful label detection and recognition is achieved with the aid of digital signal processing that allows for substantial reduction of the complexity of the detection optical front-end.
dqpsk sac labeling optical packet switching metropolitan networks coherent detection