Critical coupling in cavity-resonant integrated-grating filters (CRIGFs)

We experimentally demonstrate critical coupling in miniature grating-coupled resonators known as cavity-resonant integrated-grating filters (CRIGFs). Using previously proposed asymmetric grating coupler designs for non-linear CRIGFs, and introducing a dedicated variant of a coupled-modes theory mode...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2023-08, Vol.31 (17), p.27274
Main Authors: Hemsley, Elizabeth, Gauthier-Lafaye, Olivier, Monmayrant, Antoine, Dubreuil, Pascal, Calvez, Stéphane, Fehrembach, Anne-Laure, Popov, Evgeny
Format: Article
Language:English
Subjects:
Engineering Sciences
Physics
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We experimentally demonstrate critical coupling in miniature grating-coupled resonators known as cavity-resonant integrated-grating filters (CRIGFs). Using previously proposed asymmetric grating coupler designs for non-linear CRIGFs, and introducing a dedicated variant of a coupled-modes theory model to estimate physical properties out of the measured reflection and transmission characteristics of these resonators, we demonstrate fine control over the in-and out-coupling rate to the resonator while keeping constant both the internal losses and the resonant wavelength. Furthermore, the critical coupling condition is also observed to coincide with the maximum enhancement of the second harmonic generation signal.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.498125