Noise statistics in optically preamplified differential phase-shift keying receivers with Mach-Zehnder interferometer demodulation |
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| Authors: | Zhang Xiupu Zhang Guodong Xie Chongjin Wang Lei |
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| Affiliation: | Department of Electrical and Computer Engineering, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Québec H3G 1M8, Canada. xzhang@ece.concordia.ca |
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| Abstract: | We report an analysis of the noise statistics for an optically preamplified differential phase-shift keying (DPSK) receiver with balanced and single-port detections. It is found that identical signal-amplified spontaneous emission beating noise exists for bits 1 and 0 in DPSK balanced detection. It is also revealed that the bit error ratio (BER) of a DPSK receiver with balanced detection has no direct relation to the conventional Q factor. Moreover, an analytic BER expression for the DPSK balanced detection receiver is presented. |
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