A novel 40-Gb/s constant envelope optical frequency shift keying (FSK) transmitter and the transmission characteristics are investigated both by simulation and experiment. Meanwhile, to increase the spectrum efficiency of FSK, we propose a novel optical minimum-shift keying (MSK) scheme and analyze its performance compared with other MSK schemes and other traditional modulation formats. Simulation and experimental results show that the novel FSK scheme could be a potential candidate for the future high speed transmission and label switching systems. And the novel MSK scheme deserves future deep research for its potential excellent performance.
© 2010 Chinese Optics Letters
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4080) Fiber optics and optical communications : Modulation
Nan Chi, Wuliang Fang, Yufeng Shao, Junwen Zhang, Bo Huang, Jiangbo Zhu, and Li Tao, "High speed optical transmission utilizing constant envelope modulation based on frequency shift keying and minimum-shift keying (Invited Paper)," Chin. Opt. Lett. 8, 837-843 (2010)