Crosstalk suppression bandwidth optimisation of a vertically coupled ring resonator add/drop filter. Issue 2 (1st April 2015)

• Record Type: Journal Article
• Authors: Mansoor, Riyadh; Koziel, Slawomir; Sasse, Hugh; Duffy, Alistair
• Is Part Of: IET optoelectronics. Volume 9:Issue 2(2015)
• Page Start: 30
• Page End: 36
• Publication Date: 2015-04-01
• Subjects: numerical analysis -- optical couplers -- optical crosstalk -- optical design techniques -- optical waveguide filters -- optimisation; crosstalk suppression bandwidth optimisation -- vertical coupled single ring resonator add‐drop filter -- optical design parameter effect -- numerical investigation -- bus waveguides -- bent waveguides -- nonreturn‐to‐zero signals; Optoelectronics -- Periodicals; 621.36
• DOI: 10.1049/iet-opt.2014.0059
• Languages: English
• ISSNs: 1751-8768

Abstract

Abstract : In this study, a vertical coupled single ring resonator add/drop filter is simulated and the effect of different design parameters on the crosstalk suppression bandwidth is numerically investigated. Crosstalk suppression is defined as the difference between drop port and through port spectral responses. In a vertically coupled ring resonator, coupling efficiency between the evanescent tails of modes on the bus and bent waveguides is controlled by vertical separation and lateral deviation between waveguides. Designing a small size (single ring) add/drop filter that provides an increased crosstalk suppression bandwidth (to drop 10 Gbps non‐return to zero signals) is proposed. As the analytical calculations cannot produce an accurate prediction of the design parameters, a simulation‐driven design optimisation procedure is used to determine the values of the design parameters that produce a 21 GHz crosstalk suppression bandwidth.