17 May 2010 Highly integrated optical 8x8 lambda-router in silicon-on-insulator technology: comparison between the ring and racetrack configuration
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Abstract
In this paper, we demonstrate a compact 8x8 λ-router using multimode-interference (MMI) crossing based on the microring resonator. The 8x8 λ-router was designed and fabricated with a CMOS compatible silicon on insulator technology. MMI is used to reduce the cross talk and the crossing losses of the device. Microrings with a nominal radius of 2.5 μm and small variations of 10 nm of the nominal value allow respectively a free spectral range of 32 nm and spacing between channels of 4 nm. The experimental results are in good agreement with the modeling. The basic add drop filters of the devices exhibit losses of -2 dB and on/off contrast of the resonance of 20 dB. The total losses for one channel are about -4 dB and the imbalance between the 8 channels is lower than 2 dB.
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G. F. Fan, R. Orobtchouk, J. M. Fédéli, "Highly integrated optical 8x8 lambda-router in silicon-on-insulator technology: comparison between the ring and racetrack configuration", Proc. SPIE 7719, Silicon Photonics and Photonic Integrated Circuits II, 77190F (17 May 2010); doi: 10.1117/12.853812; https://doi.org/10.1117/12.853812
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