光纤传感器以光波为载体、光纤为媒介实现对被测信息的感知和传输,具有抗电磁干扰、信号传输距离远、现场无需供电等优点,在**和民用诸多领域得到了广泛应用。提出了一种新型光纤传感技术——双频干涉型光纤传感技术,该技术结合了干涉型光纤传感器与波长调制型光纤传感器的优点,不仅分辨率高,而且易于解调和复用。围绕超短腔双频光纤激光器制作、对外界敏感特性、换能机制、传感器复用技术等方面展开研究,并特别介绍了双频干涉型光纤声波/超声波传感器及其在生物光声成像等方面的应用。

Fiber-optic sensor converts measurands into a change in amplitude, phase, wavelength or polarization of light in optical fiber. It has advantages of small size, light weight, immune to electromagnetic interference, remote sensing capability, and has been widely used in civil engineering, aerospace, oil & gas, electric power, and so on. We designed a new type of fiber-optic sensor named dual frequency interferometric fiber-optic sensor, which integrates the advantages of interferometric sensor and wavelength-encoded sensor. It not only provides high resolution, but also can be easily demodulated and multiplexed. Our research focuses on the fabrication of ultra-short dual frequency fiber grating laser, its response to external perturbations, the transducer design, the sensor multiplexing, and etc. Furthermore, we will introduce the dual frequency interferometric acousto-ultrasonic sensors and their applications in biological photoacoustic imaging, etc.