title: Chirp-free optical return-to-zero modulation based on a single microring resonator.
abstract: This paper proposes a chirp-free optical return-to-zero (RZ) modulator using a double coupled microring resonator. Optical RZ modulation is achieved by applying a clock (CLK) driving signal to the input coupling region and a non-return-to-zero (NRZ) driving signal to the output coupling region. Static and time-domain coupled-mode theory (CMT) based dynamic analyse are performed to theoretically investigate its performance in RZ modulation. The criteria to realize RZ modulation are deduced. Various RZ modulation formats, including RZ phase-shift-keying (RZ-PSK), carrier-suppressed RZ (CSRZ), and RZ intensity modulation formats, can be implemented by using CLK and NRZ signals with different combinations of polarities. Numerical simulations are performed and the feasibility of our modulator at 10 Gbit/s for the multiple RZ modulation formats is verified.
authors.affiliation: Department of Electronic Engineering, State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Sun
authors.forename: Tong
authors.initials: T
authors.lastname: Ye
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Wang
authors.forename: Linjie
authors.initials: L
authors.lastname: Zhou
authors.forename: Jianping
authors.initials: J
authors.lastname: Chen
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008904:Miniaturization; D008962:Models, Theoretical; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*