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Passive wavelength selective polarization rotator in a hybrid waveguide platform

TitlePassive wavelength selective polarization rotator in a hybrid waveguide platform
Publication TypeJournal Article
Year of Publication2024
AuthorsDash, RK, Selvaraja, SKumar
JournalOptics Express
Volume32
Pagination13035–13047
Abstract

Polarization rotation and wavelength filtering are key functionalities used to build complex photonic integrated circuits. Both these functionalities have been demonstrated in various material and device platforms. We propose, for the first time, a fully passive wavelength selective polarization rotation in silicon nitride/amorphous silicon hybrid waveguide. We demonstrate TE0 → TM0 and TM0 → TE0 wavelength selective polarization rotator-cum-filter with a measured 3dB bandwidth of 14.8 nm. Further, we experimentally demonstrate a proof of concept for simultaneous coarse wavelength division multiplexing and polarization rotation for the first time in a passive configuration. We also show the feasibility of bandwidth engineering from 0.59 nm to 81 nm, enabled by the unique flexibility of the proposed hybrid waveguide.

URLhttps://doi.org/10.1364/OE.515141