A Phase-Retrieving Coherent Receiver Based on Two-Dimensional Photodetector Array

A Phase-Retrieving Coherent Receiver Based on Two-Dimensional Photodetector Array
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一种基于二维光电探测器阵列的相位检索相干接收机

DOI:
10.1109/jlt.2019.2947305
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发表时间:
2020
影响因子:
4.7
通讯作者:
Yamamoto Naokatsu
Yamamoto Naokatsu
中科院分区:
工程技术2区
文献类型:
--
作者:
Yoshida Yuki;Umezawa Toshimasa;Kanno Atsushi;Yamamoto Naokatsu

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为了实现超紧凑、灵活的相干收发方案,基于相位恢复(PR)的思想,提出了一种基于二维光探测器阵列(PDA)的无载波相干检测技术。在所提出的基于PR的相干接收器中,光学相位信息是由阵列光电探测器获取的多个仅强度测量数据数字化重建的,不需要本地光源、光学混合器或空间解复用器。我们利用光调制格式的先验知识,为所提出的PR接收器开发了一种健壮且低复杂度的PR算法。作为概念验证,仅用一个二维PDA就实现了10-Gbaud光相位调制信号的相干检测,包括QPSK、16-QAM、相干光OFDM和偏振复用QPSK信号。
To achieve an ultra-compact and flexible coherent transceiver solution, a carrier-less coherent detection technique using a two-dimensional (2-D) photodetector array (PDA) is proposed based on the idea of phase retrieval (PR). In the proposed PR-based coherent receiver, the optical phase information is digitally reconstructed from multiple intensity-only measurements acquired by arrayed photodetectors; neither local light sources, optical hybrids, nor spatial demultiplexers are needed. We develop a robust and low-complexity PR algorithm, which exploits prior knowledge on the optical modulation format, for the proposed PR receiver. As a proof-of-concept, the coherent detection of 10-Gbaud optical phase-modulated signals, including QPSK, 16-QAM, coherent optical OFDM, and polarization-multiplexed QPSK signals, using only a 2-D PDA is demonstrated experimentally.
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