Performance analysis of IM, DPSK and DQPSK payload signals with frequency swept coherent detected spectral amplitude code labelling

A novel scheme of generating multi-frequency spectral amplitude code labels by employing a single laser and a Fabry-Perot tunable filter

“…For simulation, a 625 Mb/s and a 1.25 Gb/s SAC labels, and a back-to-back (BTB) system are considered to demonstrate and assess its performance. Furthermore, a coherent detected label recognition unit, which has been demonstrated in our previous work, is employed to demodulate the multi-frequency SAC labels [6,9] .…”

“…This structure leads to two fetal disadvantages in SAC label switching system---low spectrum efficiency and complex, high cost label generator [5][6] .…”

扫频相干探测隐式光谱幅度码（sac）标记交换系统

“…To simplify the SAC label recognition unit, a frequency-swept coherently detected explicit SAC label switching system has been demonstrated in our previous work; this system has 156-Mb/s labels and a 40-Gb/s intensity modulation (IM) payload [11,12] . In this letter, we propose a novel implicit SAC-labeled switching system with a coherently detected SAC label recognition unit.…”

“…The frequency-swept range was from 1,552.82 to 1,552.93 nm to cover all the label available wavelengths. The parameters of this local oscillator (LO) were demonstrated and optimized at a 1,552.93-nm wavelength with 1 MHz linewidth and 0 dBm emission power [11,12] . The SAC labels were combined with the frequency-swept LO by a 3-dB coupler, after which the combined signal was transferred to electrical domain by a balanced photodetection receiver.…”