Maximum-likelihood optimal-sampling-phase estimation for ultra-high-sensitivity optically preamplified duobinary receivers |
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Authors: | Moller L Chongjin Xie Ryf R Xiang Liu Xing Wei |
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Affiliation: | Lucent Technol., Bell Labs., Holmdel, NJ, USA; |
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Abstract: | This paper describes the demonstration of a novel method for detecting optical duobinary signals. Oversampling in combination with maximum-likelihood estimation-based data processing of the optical-to-electronic converted signal results in a record sensitivity for an optically preamplified receiver. The concept is investigated at 10 Gb/s and allows data recovery at bit-error rates of 1/spl times/10/sup -9/ and 1/spl times/10/sup -3/ with a receiver sensitivity of better than -39.5 dBm and an optical signal-to-noise ratio (OSNR) of only 7.8 dB, respectively. |
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