Journal
OPTICS EXPRESS
Volume 21, Issue 20, Pages 23433-23440Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.023433
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Funding
- 973 Program [2012CB315705]
- National 863 Program [2011AA010306]
- NSFC Program [61271042, 61107058, 61120106001]
- Fundamental Research Funds for the Central Universities
- State Key Laboratory of Information Photonics and Optical Communications
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An intermodulation distortion suppression method based on the optical carrier band processing is demonstrated. A systematic analysis of the main optical spectrum contributors for the third-order intermodulation distortion in the nonlinear system is presented. Theoretical analysis shows that the third-order intermodulation distortion terms can cancel each other if a proper phase shifting is imposed to the optical carrier band. We experimentally demonstrate the approach with a two-tone test and a suppression of about 33 dB in the third-order intermodulation distortion is obtained. Experimental results show that an overall fundamental to third-order intermodulation distortion ratio of up to 64 dB is achieved and the link dynamic range is improved by 14.7 dB, compared with the conventional link without the proposed optical carrier band processing. (C) 2013 Optical Society of America
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