光学精密工程2024，Vol.32Issue(17)：2708-2717,10.DOI:10.37188/OPE.20243217.2708
光纤超声传感器的射频域自相干解调技术
Radio-frequency heterodyne detection of fiber-optic ultrasonic sensor
摘要
Abstract
The detection sensitivity of fiber-optic ultrasound sensors is crucial for image quality in fiber-based photoacoustic imaging.In this study,we employed a dual-polarization fiber laser as the acoustic sensing element and introduced radio-frequency heterodyne demodulation for sensitivity enhancement.Ex-perimental results demonstrate that this method effectively eliminates noise from additional local radio-fre-quency oscillation sources.The proposed technique achieved an improved sensitivity,evidenced by a noise-equivalent pressure(NEP)of 9.0 Pa,compared to the 5.7 Pa offered by previous approaches with-in the frequency range of 8-32 MHz.Furthermore,applying this sensor to photoacoustic microscopy re-sulted in a signal-to-noise ratio enhancement of over 4 dB.The heterodyne detection technology signifi-cantly improves the sensitivity and image signal-to-noise ratio of fiber-optic sensors,facilitating the applica-tion of fiber-based photoacoustic imaging.关键词
光纤光声成像/光纤激光传感器/光纤超声传感器/自相干解调Key words
photoacoustic imaging/fiber laser sensor/fiber-optic ultrasound sensing/heterodyne detec-tion分类
信息技术与安全科学引用本文复制引用
刘付武兴,梁贻智,曹君杰,仲晓轩,李金莹,黄卫,金龙..光纤超声传感器的射频域自相干解调技术[J].光学精密工程,2024,32(17):2708-2717,10.基金项目
国家自然科学基金资助项目(No.62275104,No.62322506,No.62122031,No.62135006) （No.62275104,No.62322506,No.62122031,No.62135006）
广东省基础与应用基础研究基金资助项目(No.2023A1515220038) （No.2023A1515220038）
广州市重点研发计划项目(No.2060404) （No.2060404）
广州市-暨南大学市校联合资助项目(No.202201020043) （No.202201020043）
