title: Novel complex gratings with third-order group-delay variations for tunable pure dispersion slope compensation.
abstract: We present a novel tunable dispersion compensator that can provide pure slope compensation. The approach uses two specially designed complex fiber Bragg gratings (FBGs) with reversely varied third-order group delay curves to generate the dispersion slope. The slope can be changed by adjusting the relative wavelength positions of the two FBGs. Several design examples of such complex gratings are presented and discussed. Experimentally, we achieve a dispersion slope tuning range of +/- 650 ps/nm(2) with > 0.9 nm usable bandwidth.
authors.affiliation: Photonics Research Group, Aston University, Birmingham B47ET, United Kingdom. x.shu@aston.ac.uk
authors.forename: Xuewen
authors.initials: X
authors.lastname: Shu
authors.forename: Elena
authors.initials: E
authors.lastname: Turitsyna
authors.forename: Kate
authors.initials: K
authors.lastname: Sugden
authors.forename: Ian
authors.initials: I
authors.lastname: Bennion
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*