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Direct-Detection Optical OFDM Transmission System Without Frequency Guard Band

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5 Author(s)
Zizheng Cao ; Key Lab. for Micro/Nano Opto-Electron. Devices of Minist. of Educ., Hunan Univ., Changsha, China ; Jianjun Yu ; Wenpei Wang ; Lin Chen
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Interleaver and turbo code techniques are used in high spectral-efficient direct-detection optical orthogonal frequency-division-multiplexing (OFDM) transmission systems allowing significant improvement of optical receiver sensitivity by mitigating the unbalanced noise distribution in subcarrier signals. The optical signal-to-noise ratio of 5.18 Gb/s, 7.77-Gb/s coded OFDM (5.18 Gb/s after decoding), and 7.77-Gb/s coded OFDM with interleaver (5.18 Gb/s after decoding) over 200-km single-mode fiber at a bit-error rate of 10-4 are 23.7, 18.0, and 17.1 dB, respectively.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 11 )