Optical frequency comb generation with high tone-to-noise ratio for large-capacity wavelength division multiplexed passive optical network

Rahat Ullah; Bo Liu; Qi Zhang; Qinghua Tian; Feng Tian; Zhaowei Qu; Cheng Yan; Muhammad Saad Khan; Ibrar Ahmad; Xiangjun Xin

doi:10.1117/1.OE.54.11.116102

3 November 2015 Optical frequency comb generation with high tone-to-noise ratio for large-capacity wavelength division multiplexed passive optical network

Rahat Ullah, Bo Liu, Qi Zhang, Qinghua Tian, Feng Tian, Zhaowei Qu, Cheng Yan, Muhammad Saad Khan, Ibrar Ahmad, Xiangjun Xin

Author Affiliations +

Optical Engineering, Vol. 54, Issue 11, 116102 (November 2015). https://doi.org/10.1117/1.OE.54.11.116102

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 multicarriers 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.

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Rahat Ullah, Bo Liu, Qi Zhang, Qinghua Tian, Feng Tian, Zhaowei Qu, Cheng Yan, Muhammad Saad Khan, Ibrar Ahmad, and Xiangjun Xin "Optical frequency comb generation with high tone-to-noise ratio for large-capacity wavelength division multiplexed passive optical network," Optical Engineering 54(11), 116102 (3 November 2015). https://doi.org/10.1117/1.OE.54.11.116102

Published: 3 November 2015

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