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Proceedings Paper

Bandwidth and center wavelength tunable micro-ring optical filter with Vernier effect by four spectrum combination
Author(s): Shijie Zhan; Gencheng Wang; Tingge Dai; Ao Shen; Jianyi Yang
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Paper Abstract

Two ultra-compact silicon bandpass filters are proposed and partly experimentally presented. Both of them have wide bandwidth tunability. Based on the first filter (filter-I), the second filter (filter-II) was designed and has large Free Spectrum Range (FSR). Two filters share the same architecture (matrix architecture), consisting two groups of micro-ring resonator-cascade structures (simply called as micro-ring resonator in this letter). Using this matrix architecture, a wide bandwidth tunability from 75 to 300 GHz can be achieved in filter-I. Based on matrix architecture, double micro-ring resonator (MRR) were adopted and Vernier effect was used in design. It is showed both in simulation and experiment that the FSR of filter-II exceeded 35 nm (around 40 nm in simulation), which is much larger than the FSR of single MRR. Filter-II’s tunability of center wavelength in simulation covers most wavelength from 1530 to 1570 nm. The comparison of bandwidth tunability between filter-I and II reveals that adding paths in matrix architecture may be more effective than adopting high-order micro-ring resonators.

Paper Details

Date Published: 20 February 2017
PDF: 10 pages
Proc. SPIE 10108, Silicon Photonics XII, 101081E (20 February 2017); doi: 10.1117/12.2250037
Show Author Affiliations
Shijie Zhan, Zhejiang Univ. (China)
Gencheng Wang, Zhejiang Univ. (China)
Tingge Dai, Zhejiang Univ. (China)
Ao Shen, Zhejiang Univ. (China)
Jianyi Yang, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 10108:
Silicon Photonics XII
Graham T. Reed; Andrew P. Knights, Editor(s)

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