Title :
Analysis of impact of receiver imperfections on performance of optical DQPSK systems
Author :
Bosco, G. ; Poggiolini, P.
Author_Institution :
Dipt. di Elettronica, Politecnico di Torino, Italy
Abstract :
The effects of key receiver impairments on the performance of differential quadrature-phase shift keying (DQPSK) are analysed. While the sensitivity to photodetector responsivity imbalance is low and comparable to the case of binary DPSK, the constraints on the maximum tolerable detuning for the interferometers are very tight. In a 40 Gbit/s system, a 1 dB penalty is already incurred with a 0.7 GHz detuning.
Keywords :
Karhunen-Loeve transforms; Mach-Zehnder interferometers; differential phase shift keying; error statistics; optical modulation; optical receivers; photodetectors; quadrature phase shift keying; sensitivity; 40 Gbit/s; Karhunen-Loeve transforms; binary DPSK; detuning; interferometers; optical differential quadrature-phase shift keying system; photodetector responsivity; receiver imperfections; sensitivity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20045809
