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1.暨南大学 物理与光电工程学院 广东省光纤传感与通信技术重点实验室, 广东 广州 510632
2.暨南大学附属第一医院 消化内科,广东 广州 510632
[ "刘付武兴(1999-),男,广东茂名人,硕士研究生,2022年于广东技术师范大学获得学士学位,主要从事生物光子学与生物医学成像领域的研究。E-mail: lf13169764648@163.com" ]
[ "梁贻智(1988-),男,广东韶关人,副研究员,硕士生导师,国家优秀青年科学基金获得者,2011年于广东工业大学获得学士学位,2017年于暨南大学获得博士学位,主要从事生物医学光子学领域的研究。E-mail: liangyizhi88528@gmail.com" ]
纸质出版日期:2024-09-10,
收稿日期:2024-05-20,
修回日期:2024-06-26,
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刘付武兴,梁贻智,曹君杰等.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.
LIUFU Wuxing,LIANG Yizhi,CAO Junjie,et al.Radio-frequency heterodyne detection of fiber-optic ultrasonic sensor[J].Optics and Precision Engineering,2024,32(17):2708-2717.
刘付武兴,梁贻智,曹君杰等.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. DOI: 10.37188/OPE.20243217.2708.
LIUFU Wuxing,LIANG Yizhi,CAO Junjie,et al.Radio-frequency heterodyne detection of fiber-optic ultrasonic sensor[J].Optics and Precision Engineering,2024,32(17):2708-2717. DOI: 10.37188/OPE.20243217.2708.
在光纤光声成像技术中,检测灵敏度是决定光纤超声传感器成像质量的关键性因素之一。以小型化正交双频光纤激光器为超声敏感元件,建立更好的信号解调技术对声致相位变化进行检测,以实现高灵敏度超声检测和光声成像。引入射频域自相干解调技术对超声波引起的激光频率变化进行读取,实验结果表明,该技术具有超声响应信号放大效果,传感器的灵敏度在8~32 MHz的超声频率内获得了显著提升,将最小可检测声压从9.0 Pa降低到5.7 Pa。进一步地,将该超声检测技术应用于活体光声显微成像,发现在同等光强的激发条件下,图像信噪比获得逾4 dB的提升。该技术为光纤光声成像技术的的应用拓展奠定了坚实的技术基础。
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. Experimental results demonstrate that this method effectively eliminates noise from additional local radio-frequency 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 within the frequency range of 8-32 MHz. Furthermore, applying this sensor to photoacoustic microscopy resulted in a signal-to-noise ratio enhancement of over 4 dB. The heterodyne detection technology significantly improves the sensitivity and image signal-to-noise ratio of fiber-optic sensors, facilitating the application of fiber-based photoacoustic imaging.
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
photoacoustic imagingfiber laser sensorfiber-optic ultrasound sensingheterodyne detection
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