Low-frequency vibration measurement by a dual-frequency DBR fiber laser
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A dual-frequency distributed Bragg reflector (DBR) fiber laser based sensor is demonstrated for low-frequency vibration measurement through the Doppler effect. The response of the proposed sensor is quite linear and is much higher than that of a conventional accelerometer. The proposed sensor can work down to 1 Hz with high sensitivity. Therefore, the proposed sensor is very efficient in low-frequency vibration measurement.
KeywordsFiber laser sensors Doppler effect vibration measurement
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11474133 and 61235005), Natural Science Foundation of Guangdong Province of China (No. 2014A030310419), and the Guangzhou Key Collaborative Innovation Foundation of China (No. 2016201604030084).
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