Ultracompact all-optical XOR logic gate in a slow-light silicon photonic crystal waveguide
Abstract
We demonstrate an ultracompact, chip-based, all-optical exclusive-OR (XOR) logic gate via slow-light enhanced four-wave mixing (FWM) in a silicon photonic crystal waveguide (PhCWG). We achieve error-free operation (<10(-9)) for 40 Gbit/s differential phase-shift keying (DPSK) signals with a 2.8 dB power penalty. Slowing the light to v(g) = c/32 enables a FWM conversion efficiency, eta, of -30 dB for a 396 mu m device. The nonlinear FWM process is enhanced by 20 dB compared to a relatively fast mode of v(g) = c/5. The XOR operation requires approximate to 41 mW, corresponding to a switching energy of 1 pJ/bit. We compare the slow-light PhCWG device performance with experimentally demonstrated XOR DPSK logic gates in other platforms and discuss scaling the device operation to higher bit-rates. The ultracompact structure suggests the potential for device integration. (C) 2011 Optical Society of America
Citation
Husko , C , Vo , T D , Corcoran , B , Li , J , Krauss , T F & Eggleton , B J 2011 , ' Ultracompact all-optical XOR logic gate in a slow-light silicon photonic crystal waveguide ' , Optics Express , vol. 19 , no. 21 , pp. 20681-20690 . https://doi.org/10.1364/OE.19.020681
Publication
Optics Express
Status
Peer reviewed
ISSN
1094-4087Type
Journal article
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