Working Paper Article Version 1 This version is not peer-reviewed

Advanced Coupled Sagnac Loop Reflectors for High Performance Optical Filters

Version 1 : Received: 27 November 2020 / Approved: 30 November 2020 / Online: 30 November 2020 (12:39:23 CET)

How to cite: Moss, D. Advanced Coupled Sagnac Loop Reflectors for High Performance Optical Filters. Preprints 2020, 2020110727 Moss, D. Advanced Coupled Sagnac Loop Reflectors for High Performance Optical Filters. Preprints 2020, 2020110727

Abstract

We theoretically investigate advanced multi-functional integrated photonic filters formed by three waveguide coupled Sagnac loop reflectors (3WC-SLRs). By tailoring the coherent mode interference, the spectral response of the 3WC-SLR resonators is engineered to achieve diverse filtering functions with high performance. These include optical analogues of Fano resonances that yield ultrahigh spectral extinction ratios (ERs) and slope rates, resonance mode splitting with high ERs and low free spectral ranges, and classical Butterworth, Bessel, Chebyshev, and elliptic filters. A detailed analysis of the impact of the structural parameters and fabrication tolerances is provided to facilitate device design and optimization. The requirements for practical applications are also considered. These results theoretically verify the effectiveness of using 3WC-SLR resonators as multi-functional integrated photonic filters for flexible spectral engineering in diverse applications.

Subject Areas

Integrated optics; resonators; Fano resonance; mode splitting; classical filters

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