Demonstrating Doubly-Differential Quadrature Phase Shift Keying in the Optical Domain

Author

Walsh, Anthony J. ; Shams, Haymen ; Mountjoy, James ; Fagan, Anthony ; Jian Zhao ; Barry, Liam P. ; Ellis, A.D.

Author_Institution

Rince Inst., Dublin City Univ., Dublin, Ireland

Volume

25

Issue

11

fYear

2013

fDate

1-Jun-13

Firstpage

1054

Lastpage

1057

Abstract

We report for the first time the experimental demonstration of doubly differential quadrature phase shift keying (DDQPSK) using optical coherent detection. This method is more robust against high frequency offsets (FO) than conventional single differential quadrature phase shift keying (SDQPSK) with offset compensation. DDQPSK is shown to be able to compensate large FOs (up to the baud rate) and has lower computational requirements than other FO compensation methods. DDQPSK is a simple algorithm to implement in a real-time decoder for optical burst switched network scenarios. Simulation results are also provided, which show good agreement with the experimental results for both SDQPSK and DDQPSK transmissions.

Keywords

decoding; differential phase shift keying; optical burst switching; optical fibre networks; quadrature phase shift keying; switching networks; DDQPSK transmission; FO compensation; doubly-differential quadrature phase shift keying; frequency offsets; optical burst switched network scenario; optical coherent detection; optical domain; real-time decoder; Burst switching; optical fiber communication; phase modulation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2257726

Filename

6497500