2026-05-31T04:31:25Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/179952026-02-03T12:32:09Zcom_10630_2254col_10630_37959
Design of arbitrary optical filters in silicon-on-insulator using evanescently-coupled Bragg gratings
Pereira-Martín, Daniel
Ortega-Moñux, Alejandro
Molina-Fernández, Íñigo
Luque-González, José Manuel
Cheben, Pavel
Schmid, Jens H.
Ye, Winnie N.
Ctyroky, Jiri
Wanguemert-Pérez, Juan Gonzalo
Spectral filters are experiencing an increasing demand in several applications of the silicon-
on-insulator (SOI) platform. Many works have demonstrated that arbitrary frequency
responses can be synthesized by apodizing the coupling coefficient profile of an integrated
Bragg grating. However, the high index contrast of the SOI platform hinders their
practical implementation, due to the difficulty of achieving the precise control required in
the Bragg strength. In this paper, we propose the implementation of spectral filters using
an architecture based on placing loading segments within the evanescent field region of a
photonic wire waveguide. The Bragg coupling coefficient can be accurately controlled by
simply moving the segments away from, or closer to, the waveguide core. The layerpeeling
algorithm, in conjunction with a Floquet-Bloch modal analysis, allows to determine
the spatial distribution of the segments that synthesizes the desired spectrum. The
proposed topology is verified by designing a filter with five arbitrary passbands.
2019-07-10T08:14:25Z
2019-07-10T08:14:25Z
2019-07-10T08:14:25Z
2019-07-10
conference output
https://hdl.handle.net/10630/17995
eng
OPTOEL 2019
Zaragoza (España)
07/2019
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
Attribution-NonCommercial-NoDerivatives 4.0 Internacional