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Ultracompact all-optical XOR logic gate in a slow-light silicon photonic crystal waveguide

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HuskoUltracompactAllOpticalXORLogicGate2011.pdf (1.921Mb)
Date
10/10/2011
Author
Husko, C.
Vo, T. D.
Corcoran, B.
Li, Juntao
Krauss, Thomas Fraser
Eggleton, B. J.
Funder
EPSRC
European Commission
Grant ID
EP/F001622/1
Keywords
Photonic crystal waveguides
Phase modulation
Optical logic devices
QC Physics
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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
DOI
https://doi.org/10.1364/OE.19.020681
ISSN
1094-4087
Type
Journal article
Rights
(c) 2011 OSA. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at http://www.opticsinfobase.org
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/2810

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