Single-carrier 800-Gb/s self-homodyne coherent transmission of DP-16QAM, DP-32QAM, and DP-64QAM with uncooled DFB laser
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Published:2023-08-02
Issue:17
Volume:31
Page:27553
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ISSN:1094-4087
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Container-title:Optics Express
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language:en
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Short-container-title:Opt. Express
Author:
Yang Min12ORCID,
Yan Guofeng12,
Zheng Shuo12,
Wan Zhenyu12ORCID,
Zhang Xi12ORCID,
Zhu Yanjun3,
Zhang Hua4,
Yao Chaonan4,
Shao Yuchen4,
Wang Jian12ORCID
Affiliation:
1. Huazhong University of Science and Technology
2. Optics Valley Laboratory
3. Hisense Broadband Inc
4. Hisense Broadband Multimedia Technologies Co., Ltd
Abstract
Self-homodyne detection (SHD) is a promising approach to realize high-capacity short-reach optical transmission systems with low cost and low power consumption. We experimentally demonstrate single-carrier net 800-Gb/s SHD transmission with low-cost ∼MHz linewidth distributed feedback (DFB) laser over 2 km, 10 km, 25 km, and 40 km single-mode fiber (SMF) using three different quadrature amplitude modulation (QAM) formats, including 80-Gbaud dual-polarization (DP) 64QAM, 100-Gbaud DP-32QAM, and 120-Gbaud DP-16QAM. Among them, net 800-Gb/s DP-64QAM SHD transmission over 25 km SMF using an uncooled DFB laser with a linewidth of 2.6 MHz is experimentally verified. The detailed experimental performance evaluation of net 800Gb/s SHD system is performed, in which various configurations are considered, such as different laser linewidths, three QAM formats, and different transmission distances. DFB lasers with linewidths of 1 MHz and 2.6 MHz lead to negligible penalty when compared to the same SHD system but using an external cavity laser (ECL) with a linewidth of 26kHz in back-to-back (BTB) case. 80-Gbaud DP-64QAM obtains the highest optical signal-to-noise ratio (OSNR) requirement and the highest bit-error rate (BER) floor but the best tolerance of chromatic dispersion (CD). 120-Gbaud DP-16QAM achieves the lowest OSNR requirement and the lowest BER floor but the worst tolerance of CD. The detailed experimental investigation is conducive to promote the practical application of SHD in different short-reach scenarios.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hubei Province
the Key R&D Program of Hubei Province of China
the Shenzhen Science and Technology Innovation Program
the Innovation Project of Optics Valley Laboratory
the Cooperation Project between Hisense Broadband and Huazhong University of Science and Technology
Publisher
Optica Publishing Group
Subject
Atomic and Molecular Physics, and Optics