Series-coupled silicon racetrack resonators and the Vernier effect: theory and measurement

被引:107
作者
Boeck, Robi [1 ]
Jaeger, Nicolas A. F. [1 ]
Rouger, Nicolas [1 ]
Chrostowski, Lukas [1 ]
机构
[1] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC V5Z 1M9, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
REFRACTIVE-INDEX; PHOTONIC WIRES; WAVELENGTH; FILTERS;
D O I
10.1364/OE.18.025151
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Silicon-on-insulator racetrack resonators can be used as multiplexers in wavelength division multiplexing applications. The free spectral range should be comparable to the span of the C-band so that a maximum number of channels can be multiplexed. However, the free spectral range is inversely proportional to the length of the resonator and, therefore, bending losses can become non-negligible. A viable alternative to increase the free spectral range is to use the Vernier effect. In this work, we present the theory of series-coupled racetrack resonators exhibiting the Vernier effect. We demonstrate the experimental performance of the device using silicon-on-insulator strip waveguides. The extended free spectral range is 36 nm and the interstitial peak suppression is from 9 dB to 17 dB. (C) 2010 Optical Society of America
引用
收藏
页码:25151 / 25157
页数:7
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