Sensing pulse-synchronous temporal entropy loading technique for co-wavelength optical fiber ISAC system.

IF 3.3 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-22 DOI:10.1364/OL.614054

Meng Xiang, Bingbing Zhang, Weitao Zheng, Jiacai Liu, Songnian Fu, Yuwen Qin

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引用次数: 0

Abstract

Co-wavelength optical fiber integrated sensing and communication (ISAC) improves spectral utilization but suffers from pulse-synchronous nonlinear impairments when high-peak-power sensing pulses overlap with communication symbols. Here, we propose a sensing pulse-synchronous temporal entropy loading (SP-TEL), which adapts probabilistically constellation-shaped (PCS) symbols to the sensing pulse-induced time-varying channel by assigning different entropies to corresponding pulse-overlapped and non-overlapped communication symbols, respectively. We experimentally validate the effectiveness of SP-TEL in a 40 GBaud four-subcarrier PCS-DP-64QAM co-wavelength ISAC system over 10.91 km standard single-mode fiber (SSMF). Compared with the traditional uniform-entropy technique, SP-TEL can improve the generalized mutual information (GMI) by 0.2 bit/symbol and reduce the required optical signal-to-noise ratio (OSNR) by up to 3 dB at the target GMI of 4.6 bit/symbol. Meanwhile, reliable 1 kHz vibration localization is secured with 10 m spatial resolution and a vibration SNR of 30.04 dB.

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共波长光纤ISAC系统传感脉冲同步时间熵加载技术。

共波长光纤集成传感与通信（ISAC）提高了频谱利用率，但在高峰值功率传感脉冲与通信符号重叠时存在脉冲同步非线性损伤。本文提出了一种传感脉冲同步时间熵加载（SP-TEL）方法，该方法通过分别为相应的脉冲重叠和非重叠通信符号分配不同的熵，使概率星座形（PCS）符号适应于传感脉冲诱导的时变信道。实验验证了SP-TEL在40 GBaud四子载波PCS-DP-64QAM共波长ISAC系统中在10.91 km标准单模光纤（SSMF）上的有效性。与传统的均匀熵技术相比，SP-TEL可以将广义互信息（GMI）提高0.2 bit/symbol，并将目标GMI为4.6 bit/symbol时所需的光信噪比（OSNR）降低高达3 dB。同时，以10 m的空间分辨率和30.04 dB的振动信噪比，实现了可靠的1 kHz振动定位。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.