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Optical Engineering

Flexible tunable optical transceiver based on field-programmable gate array for time and wavelength-division multiplexed passive optical network systems
Author(s): Sheng Hu; Yonglin Yu; Cheng Li; Yao Zhu; Yu Han
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Paper Abstract

Time- and wavelength-division multiplexed passive optical networks (TWDM-PONs) have been selected by the full services access network community as the most suitable technology for next-generation optical access networks. A key technology in TWDM-PON is the colorless optical network unit transceiver. This paper proposes a flexible, tunable optical transceiver that uses directly modulated tunable lasers. Using a field-programmable gate array (FPGA), programmable reconfigurations and testing capabilities can be embedded into the transceiver in order to implement wavelength control, signal generation, pre-emphasis for upstream, and a bit error rate (BER) test for the downstream. To ensure high-quality signal generation at different bitrates, impedance matching between the laser driver circuit and the laser diodes is optimized. Using the proposed transceiver, three-section-distributed Bragg reflector tunable lasers at or below 2.5  Gb/s direct modulation through a 40-km standard mode fiber transmission were successfully implemented.

Paper Details

Date Published: 23 August 2016
PDF: 7 pages
Opt. Eng. 55(8) 086110 doi: 10.1117/1.OE.55.8.086110
Published in: Optical Engineering Volume 55, Issue 8
Show Author Affiliations
Sheng Hu, Huazhong Univ. of Science and Technology (China)
Yonglin Yu, Huazhong Univ. of Science and Technology (China)
Cheng Li, Huazhong Univ. of Science and Technology (China)
Yao Zhu, Huazhong Univ. of Science and Technology (China)
Yu Han, Wuhan Huagong Genuine Optics Tech Co., Ltd. (HG Genuine) (China)

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