Authors
Yaguang Hao, Xueyang Li, Quanxin Na, Dongwei Zhuang, Qijie Xie, Jianwei Tang, Lingguo Cao, Jianyu Wang, Lulu Liu, Yanfu Yang, Zhixue He, Lei Wang
Published in
Optics letters. Volume 51. Issue 21. Pages 6115-6118. Nov 01, 2026. Epub Sep 21, 2026.
Abstract
Single-ended vibration localization based on frequency-shifted optical delay lines avoids the time synchronization required by dual-ended schemes but requires costly narrow-linewidth lasers. To overcome this limitation, we introduce a transmitter-side matched-delay local oscillator (MD-LO) for the sensing unit. The MD-LO matches the sensing-link length and the delay paths between frequency-shifted components, which can tolerate laser phase noise through self-coherent detection. With sensing aided by the MD-LO, vibration detection down to 10 Hz under a 3-MHz-linewidth distributed-feedback (DFB) laser is achieved, and single-ended distributed vibration localization over a 25.2-km weakly coupled four-core fiber is demonstrated. As an illustrative example of integrated sensing and communication (ISAC), the sensing carrier also serves as the local oscillator for self-coherent communication, achieving 3 × 448 Gb/s net transmission over the remaining three cores.
PMID:
42962137
Bibliographic data and abstract were imported from PubMed on 31 Oct 2026.
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