期刊
OPTICS EXPRESS
卷 18, 期 24, 页码 25151-25157出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.025151
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资金
- Natural Sciences and Engineering Research Council of Canada (CGS-M)
- CMC Microsystems
- Lumerical Solutions Inc.
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
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