Title :
Analysis of optimum FBG configurations in DPSK and DQPSK systems
Author :
Yun Ii Go ; Thio, Tzer Hwai Gilbert
Author_Institution :
Dept. of Electr. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia
Abstract :
This paper presents the optimization of fiber Bragg grating (FBG) configurations for systems implemented with two modulation schemes: differential phase shift keying (DPSK) and differential quadrature phase shift keying (DQPSK). This paper investigates the possibility of applying a new FBG configuration based on standard spread spectrum sequences. Phase encoding using FBG is applied in both systems. Two design parameters of the encoding schemes are evaluated: code weight and chip length. The system performance is evaluated from three key aspects: modulation scheme, signal-to-noise ratio (SNR) and transmission distance. A comparative study on different FBG configurations is also outlined. This work eliminates the requirement of wavelength conversion and fiber delay lines (FDL). The optimal solution is evaluated in a four-user system considering various noise sources and non-linear effects.
Keywords :
Bragg gratings; code division multiple access; differential phase shift keying; modulation coding; optical fibre communication; optical fibres; optical modulation; optimisation; quadrature phase shift keying; spread spectrum communication; DPSK system; DQPSK system; OCDMA systems; chip length; code weight; differential phase shift keying system; differential quadrature phase shift keying system; four-user system; modulation scheme; noise sources; nonlinear effects; optical code division multiple access systems; optimum FBG configurations; phase encoding; signal-to-noise ratio; standard spread spectrum sequences; system performance evaluation; transmission distance; encoding; fiber Bragg grating; phase shift keying;
Conference_Titel :
Frontiers of Communications, Networks and Applications (ICFCNA 2014 - Malaysia), International Conference on
Print_ISBN :
978-1-78561-072-1
DOI :
10.1049/cp.2014.1415
