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Series-Coupled Silicon Racetrack Resonators and the Vernier Effect: Theory and Measurement

Publication Type:

Journal Article

Source:

Optics Express, Volume 18, Issue 24, p.7 (2010)

URL:

http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-18-24-25151

Abstract:

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.

Faculty Member(s): 
Lukas.Chrostowski
Faculty Member(s): 
Nicolas.Jaeger
Research Area(s): 
Photonics and Optics