Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Rahat Ullah, Qi Zhang, Qinghua Tian

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, No. 10 Xitucheng Road, Beijing 100876, China

Bo Liu, Xiangjun Xin

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, No. 10 Xitucheng Road, Beijing 100876, China

Beijing University of Posts and Telecommunications, School of Electronic Engineering, No. 10 Xitucheng Road, Beijing 100876, China

Feng Tian, Muhammad Saad Khan

Beijing University of Posts and Telecommunications, School of Electronic Engineering, No. 10 Xitucheng Road, Beijing 100876, China

Zhaowei Qu

Beijing University of Posts and Telecommunications, Institute of Network Technology, No. 10 Xitucheng Road, Beijing 100876, China

Cheng Yan

Tsinghua University, Information Technology Center, Beijing100084, China

Ibrar Ahmad

Beijing University of Posts and Telecommunications, School of Computer Science and Technology, No. 10 Xitucheng Road, Beijing 100876, China

Opt. Eng. 54(11), 116102 (Nov 03, 2015). doi:10.1117/1.OE.54.11.116102
History: Received July 23, 2015; Accepted October 8, 2015
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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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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Rahat Ullah ; Bo Liu ; Qi Zhang ; Qinghua Tian ; Feng Tian, et al.
"Optical frequency comb generation with high tone-to-noise ratio for large-capacity wavelength division multiplexed passive optical network", Opt. Eng. 54(11), 116102 (Nov 03, 2015). ; http://dx.doi.org/10.1117/1.OE.54.11.116102


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