公开(公告)号：US20250027808A1

公开(公告)日：2025-01-23

申请号：US18774967

申请日：2024-07-17

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Baicheng YAO ,  Xinyue HE ,  Bing CHANG ,  Teng TAN ,  Shangce WANG ,  Yu WU

IPC: G01H9/00

Abstract: Embodiments of the present disclosure relate to the field of acoustic sensing demodulation with high signal-to-noise ratio, real-time demodulation, and high sensitivity, and in particular, to a parallel sensing and demodulation system for acoustic waves based on dual optical frequency combs. The present disclosure introduces dual optical frequency combs as multi-path parallel input light sources, leveraging features of the dual optical frequency combs including narrow linewidth, stable power, high sensitivity, and the capability of precisely converting signals from the optical domain to the radio frequency domain, so the dual optical frequency combs can be used as multi-channel parallel input light sources for acoustic array detection. Besides, some embodiments of the present disclosure employ three-wavelength adaptive demodulation technology to ensure that the detection of acoustic wave signals at every moment has a high signal-to-noise ratio and improved sensitivity for detecting weak signals.

公开(公告)号：US20240219532A1

公开(公告)日：2024-07-04

申请号：US18401295

申请日：2023-12-29

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Teng TAN ,  Bing CHANG ,  Baicheng YAO ,  Xinyue HE ,  Zihan LIU

IPC: G01S7/4865 ,  G01S7/481 ,  G01S7/484 ,  G01S17/10

CPC classification number: G01S7/4865 ,  G01S7/4815 ,  G01S7/484 ,  G01S17/10

Abstract: The embodiments of the present disclosure provide a ranging system of a dual optical frequency comb time-of-flight manner based on dispersive Fourier transform. The embodiment of the present disclosure introduces a dispersive Fourier transform technology into a conventional dual optical frequency comb system, which amplifies a stray relationship of a pulse time domain using a dispersion element and obtains a precise position relationship of three pulses directly through interfering fringe information. Therefore, the “dead zone” in the conventional dual optical frequency comb ranging system is eliminated, and the ranging accuracy of the system is greatly improved, and a repetition frequency difference of the dual optical frequency combs can be increased to a magnitude of MHz, which greatly improves the ranging speed. The ranging system has advantages of a large measurement range, a high measurement accuracy, and a high measurement speed.