期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 26, 期 14, 页码 1418-1421出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2014.2326558
关键词
Fiber optics sensors; DBR laser; accelerometer; vibration measurements
资金
- Hong Kong Polytechnic University [G-U263, G-YJ84]
- National Natural Science Foundation of China [61025013, 61210006, 61275075]
- Research Found for Post-Doctoral Fellow [879185522]
We propose an optical accelerometer based on distributed Bragg reflector (DBR) fiber laser sensor. The transducer's vibration reduces the birefringence of the preloaded fiber laser and consequently changes the beat frequency of the two orthogonally polarized lasing modes, thus the frequency can be used to retrieve the acceleration information. The DBR probe is a segment of bare erbium fiber, which has a very high natural frequency of vibration. Experimental results show that sensitivity of 4.810 MHz/g with a dynamic range of 0.01g-5g (where g = 9.8 m/s(2) is the gravity of the earth) and natural frequency of similar to 1.3 kHz can be obtained with this sensing system.
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