Title :
A Novel Orthogonally Modulation Scheme for Superimposing DPSK Signals on Dark RZ Signals
Author :
Shao, Yufeng ; Chen, Lin ; Wen, Shuangchun ; Yu, Jianjun ; He, Jing ; Cheng, Lili ; Liu, Haiyan
Author_Institution :
Sch. of Comput. & Commun., Hunan Univ., Changsha
Abstract :
A simple and novel configuration of transmitter for superimposing DPSK signals on dark RZ signals with tunable duty cycle was proposed. The transmitter comprises two optical phase modulators and a delayed line Mach-Zehnder interferometer. The results show that the spectral efficiency is doubled by using this scheme.
Keywords :
Mach-Zehnder interferometers; differential phase shift keying; optical modulation; optical transmitters; DPSK signals; Mach-Zehnder interferometer; dark RZ signals; delayed line interferometer; optical phase modulators; orthogonal modulation; spectral efficiency; transmitter; tunable duty cycle; Delay effects; Differential quadrature phase shift keying; High speed optical techniques; Nonlinear optics; Optical interferometry; Optical modulation; Optical sensors; Optical transmitters; Phase modulation; Signal generators;
Conference_Titel :
Lasers and Electro-Optics - Pacific Rim, 2007. CLEO/Pacific Rim 2007. Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-1173-3
Electronic_ISBN :
978-1-4244-1174-0
DOI :
10.1109/CLEOPR.2007.4391252
