摘要
A novel distributed feedback（DFB） fiber laser sensor, which can measure acoustic and magnetic fields simultaneously, is proposed. The magnetic field can be measured by detecting the change of resonant frequency of the fiber laser, and the acoustic pressure can be measured by detecting the phase shift of the fiber laser. Both of the signals can be simultaneously demodulated in the frequency domain without affecting each other. Experimental studies show that the acoustic pressure sensitivity of this sensor is about-130 d B（0 dB re 1 pm∕μPa） and the sensor has a good linearity with a magnetic field sensitivity of 0.57 Hz∕mT.
A novel distributed feedback（DFB） fiber laser sensor, which can measure acoustic and magnetic fields simultaneously, is proposed. The magnetic field can be measured by detecting the change of resonant frequency of the fiber laser, and the acoustic pressure can be measured by detecting the phase shift of the fiber laser. Both of the signals can be simultaneously demodulated in the frequency domain without affecting each other. Experimental studies show that the acoustic pressure sensitivity of this sensor is about-130 d B（0 dB re 1 pm∕μPa） and the sensor has a good linearity with a magnetic field sensitivity of 0.57 Hz∕mT.
作者
马瑞
张文涛
黄稳柱
李芳
Rui Ma;Wentao Zhang;Wenzhu Huang;Fang Li(State Key Laboratory of Transducer Technology, Institute of Semiconductors, Chinese Academy of Sciences Beijing 100083, China;College of Materials Science and Opto-Eleetronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China)
基金
supported by the Key R&D Program of China(No.2017YFB0405503)
the Youth Innovation Promotion Association of CAS(No.2016106)
