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High-speed, all-optical XOR gates using semiconductor
optical amplifiers in ultrafast nonlinear interferometers |
| Xuelin YANG1,Qiwei WENG2,Weisheng HU2, |
| 1.The State Key Laboratory
of Advanced Optical Communication Systems and Networks, Shanghai Jiao
Tong University, Shanghai 200240, China；Photonic Systems Group,
Tyndall National Institute, University College Cork, Cork, Ireland; 2.The State Key Laboratory
of Advanced Optical Communication Systems and Networks, Shanghai Jiao
Tong University, Shanghai 200240, China; |
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Abstract We will review three recently-proposed high-speed, all-optical Exclusive OR (XOR) gates operating at 40 and 85 Gb/s, which were demonstrated using ultrafast nonlinear interferometers (UNIs) incorporating semiconductor optical amplifiers (SOAs). The first 40-Gb/s XOR gate was obtained using a dual UNI configuration. The second is a 40-Gb/s XOR gate without additional probe beam required, where the only inputs launched into the setup were data A and B. The XOR logic of data A and B is the sum of two components !["Graphic"]("..\images\23\5c\ed\06\hcm0000169853.html.graphics/HML3120116.png.gif") and !["Graphic"]("..\images\23\5c\ed\06\hcm0000169853.html.graphics/HML3120117.png.gif") , each of which was obtained from the output of UNI via cross-phase modulation (XPM) in SOAs. Furthermore, an 85-Gb/s XOR gate is, by far, the fastest XOR gate realized by SOAs, which was also demonstrated using a dual UNI structure. The operating speed of the XOR gate was enhanced by incorporating the recently proposed turbo-switch configuration. In addition, the SOA switching pulse energies of these XOR gates were lower than 100fJ.
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Issue Date: 05 September 2010
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