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- Title
Optical frequency comb generation with high tone-to-noise ratio for large-capacity wavelength division multiplexed passive optical network.
- Authors
Ullah, Rahat; Bo Liu; Qi Zhang; Qinghua Tian; Feng Tian; Zhaowei Qu; Cheng Yan; Khan, Muhammad Saad; Ahmad, Ibrar; Xiangjun Xin
- Abstract
We propose a technique for the generation of optical frequency comb from a single source, which reduces the costs of optical access networks. Two Mach-Zehnder modulators are cascaded with one phase modulator driven by radiofrequency signals. With 10-GHz frequency spacing, the generated 40 optical multi-carriers have good tone-to-noise ratio with least excursions in their comb lines. The laser array at the optical line terminal of the conventional wavelength division multiplexed passive optical network (WDM-PON) system has been replaced with optical frequency comb generator (OFCG), which may result in cost-effective optical line terminal (OLT) supporting a large-capacity WDM-PON system. Of 40 carriers generated, each carrier carries 10 Gbps data based on differential phase-shift keying. Four hundred Gbps multiplexed data from all channels are successfully transmitted through a fiber span of 25 km with negligible power penalties. Part of the downlink signal is used in uplink transmission at optical network unit where intensity-modulated on-off keying is deployed for remodulation. Theoretical analysis of the proposed WDM-PON system based on OFCG are in good agreement with simulation results. The metrics considered for the analysis of the proposed OFCG in a WDM-PON system are power penalties of the full-duplex transmission, eye diagrams, and bit error rate.
- Subjects
COMB filters; WAVELENGTH division multiplexing; OPTICAL frequency conversion; PHASE shift keying; RADIO frequency; TELECOMMUNICATION channels; SIGNAL-to-noise ratio
- Publication
Optical Engineering, 2015, Vol 54, Issue 11, p1
- ISSN
0091-3286
- Publication type
Article
- DOI
10.1117/1.OE.54.11.116102