title: Travelling wave analysis on high-speed performance of Q-modulated distributed feedback laser.
abstract: The structure of a Q-modulated distributed feedback laser is designed and simulated. A large reflectivity modulation of the rear reflector is achieved by using an anti-resonant cavity formed by two deep trenches with the one between the modulator and phase section filled by a high index dielectric material. The travelling wave model is presented to analyze the high speed performance of the laser. Due to the effect of the wave propagation in the structure, the modulation extinction ratio decreases with increasing cavity length. It is shown that 40 Gb/s RZ signal modulation can be achieved with an extinction ratio of 7 dB and 10 dB, respectively, for a cavity length of 500 μm and 300 μm.
authors.affiliation: Centre for Integrated Optoelectronics, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, China 310027.
authors.forename: Jiankun
authors.initials: J
authors.lastname: Zhi
authors.forename: Hongli
authors.initials: H
authors.lastname: Zhu
authors.forename: Dekun
authors.initials: D
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: He
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation