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Advanced photonic filters based on cascaded Sagnac loop reflector resonators in silicon-on-insulator nanowires

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posted on 2024-07-11, 09:48 authored by Jiayang WuJiayang Wu, Tania MoeinTania Moein, Xingyuan Xu, David MossDavid Moss
We demonstrate advanced integrated photonic filters in silicon-on-insulator (SOI) nanowires implemented by cascaded Sagnac loop reflector (CSLR) resonators. We investigate mode splitting in these standing-wave (SW) resonators and demonstrate its use for engineering the spectral profile of on-chip photonic filters. By changing the reflectivity of the Sagnac loop reflectors (SLRs) and the phase shifts along the connecting waveguides, we tailor mode splitting in the CSLR resonators to achieve a wide range of filter shapes for diverse applications including enhanced light trapping, flat-top filtering, Q factor enhancement, and signal reshaping. We present the theoretical designs and compare the CSLR resonators with three, four, and eight SLRs fabricated in SOI. We achieve versatile filter shapes in the measured transmission spectra via diverse mode splitting that agree well with theory. This work confirms the effectiveness of using CSLR resonators as integrated multi-functional SW filters for flexible spectral engineering.

Funding

ARC | DP150104327

CMOS compatible nonlinear photonic integrated circuits. : Australian Research Council (ARC) | DP150104327

History

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PDF (Published version)

ISSN

2378-0967

Journal title

APL Photonics

Volume

3

Issue

4

Article number

article no. 046102

Pagination

046102-

Publisher

AIP Publishing

Copyright statement

Copyright © The Author(s) 2018. Licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Language

eng

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