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Proceedings Paper

100-Gb/s OFDM/OQAM over 100-km transmission based on guard-band-shared direct-detection scheme
Author(s): Qi Yang; Chao Li; Xiang Li
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Paper Abstract

In this paper, we propose guard-band-shared direct-detection (GBSDD) scheme to simultaneously receive multi-band 100-Gb/s direct-detection optical signal with only one conventional 40-GHz photodiode. The modulation format of orthogonal frequency-division multiplexing based on offset quadrature amplitude modulation (OFDM/OQAM) is selected to provide signal spectrum with high side-lobe suppression ratio, which can effectively reduce the electrical subband frequency interference. In GBSDD scheme, only one guard band is required to accommodate the overlapped signal-to-signal beat interference (SSBI) induced by all the multi-band optical signals. Three different GBSDD schemes are experimentally demonstrated with total data rate of 100-Gb/s and OFDM/OQAM modulation format. The first one uses 6 subbands with transmission distance of 320 km and hybrid 32-QAM and 16-QAM formats. 6 lasers are used as the pilot carriers to beat the signal. The seconds utilizes only 2 subbands with 64-QAM format in 80-km fiber transmission, which are assigned onto two orthogonal polarizations. Only one optical pilot carrier is inserted to beat with the 2 subbands on the two polarizations. The 2 subbands are located on the one side of the optical carrier. Comparing with the first scheme, the bandwidth usage of the PD is enhanced from 1/2 to 2/3. In the third scheme, the 100-Gb/s optical signal includes 4 subbands with 32-QAM format after 880-km fiber transmission. The 4 subbands locate at the two sides of the optical pilot subcarrier. Under this condition, the bandwidth usage of the PD is further improved from 2/3 to 4/5.

Paper Details

Date Published: 28 January 2017
PDF: 9 pages
Proc. SPIE 10129, Optical Metro Networks and Short-Haul Systems IX, 101290A (28 January 2017); doi: 10.1117/12.2257107
Show Author Affiliations
Qi Yang, Wuhan Research Institute of Posts and Telecommunications (China)
Chao Li, Univ. of Electronic Science and Technology of China (China)
Xiang Li, Wuhan Research Institute of Posts and Telecommunications (China)

Published in SPIE Proceedings Vol. 10129:
Optical Metro Networks and Short-Haul Systems IX
Atul K. Srivastava; Benjamin B. Dingel; Youichi Akasaka, Editor(s)

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