Multilongitudinal mode fiber laser for strain measurement.
Multilongitudinal mode fiber laser for strain measurement.
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DOI：
10.1364/ol.35.000835
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发表时间：
2010-03
期刊：
影响因子：
3.6
通讯作者：
Shengchun Liu;Z. Yin;Liang Zhang;Liang Gao;Xiangfei Chen;Jian-chun Cheng
中科院分区：
文献类型：
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作者：
Shengchun Liu;Z. Yin;Liang Zhang;Liang Gao;Xiangfei Chen;Jian-chun Cheng
首次提出并通过实验验证了由两个光纤布拉格光栅和一段掺铒光纤组成的多纵模光纤激光传感器。当传感器上施加应变时，激光腔被拉伸，从而导致往返频率发生变化。因此，可以通过测量谐振腔的拍频来获得应变。所提出的传感器具有简单、易于设置、高分辨率、低成本解调和良好稳定性的特点。实验结果表明，该传感器的灵敏度为-1.1 KHz/microepsilon，均方根偏差为3.6 microepsilon。
A multilongitudinal mode fiber laser sensor formed by two fiber Bragg gratings and a piece of erbium-doped fiber is first proposed and validated experimentally. When the strain is applied on the sensor, the laser cavity is stretched, which leads to a change of round-trip frequency. Thus the strain can be obtained by measuring the beat frequency of the resonant cavity. The proposed sensor is found to be characterized with simplicity, easy setup, high resolution, low-cost demodulation, and good stability. Experimental results show that the sensor has a sensitivity of -1.1 KHz/microepsilon and the root-mean-square deviation of 3.6 microepsilon.