title: Programmable wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital thermal controller.
abstract: We proposed and experimentally demonstrated an all-fiber structured wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital-controlled thermal array. The central frequency of the differentiation can be reconfigured from 192.141 to 192.616 THz by a programmable circuit. In the experiment, a second-order differentiator with 3 dB bandwidth of 0.086 THz is achieved with a root mean square error of 4.89%.
authors.forename: Hailiang
authors.initials: H
authors.lastname: Zhang
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.forename: Yiwei
authors.initials: Y
authors.lastname: Xie
authors.forename: Songnian
authors.initials: S
authors.lastname: Fu
authors.forename: Deming
authors.initials: D
authors.lastname: Liu
authors.forename: Perry Ping
authors.initials: PP
authors.lastname: Shum