Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity

Wu, J, Moein, T, Xu, X, Ren, G, Mitchell, A and Moss, D 2017, 'Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity', APL Photonics, vol. 2, 056103, pp. 1-7.


Document type: Journal Article
Collection: Journal Articles

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Title Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity
Author(s) Wu, J
Moein, T
Xu, X
Ren, G
Mitchell, A
Moss, D
Year 2017
Journal name APL Photonics
Volume number 2
Article Number 056103
Start page 1
End page 7
Total pages 7
Publisher AIP Publishing
Abstract We propose and experimentally demonstrate the enhancement in the filtering quality (Q) factor of an integrated micro-ring resonator (MRR) by embedding it in an integrated Fabry-Perot (FP) cavity formed by cascaded Sagnac loop reflectors. By utilizing coherent interference within the FP cavity to reshape the transmission spectrum of the MRR, both the Q factor and the extinction ratio (ER) can be significantly improved. The device is theoretically analyzed and practically fabricated on a silicon-on-insulator wafer. Experimental results show that up to 11-times improvement in the Q factor, together with an 8-dB increase in the ER, can be achieved via our proposed method. The impact of varying structural parameters on the device performance is also investigated and verified by the measured spectra of the fabricated devices with different structural parameters.
Subject Photonics and Electro-Optical Engineering (excl. Communications)
Photonics, Optoelectronics and Optical Communications
DOI - identifier 10.1063/1.4981392
Copyright notice All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
ISSN 2378-0967
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