Experimental study on the affection of sidelobe of FBG on the multiplex demodulation result[J]. Optics and precision engineering, 2009, 17(11): 2672-2677.
Experimental study on the affection of sidelobe of FBG on the multiplex demodulation result[J]. Optics and precision engineering, 2009, 17(11): 2672-2677.DOI:
the demodulation affection of reflection sidelobe on the fiber Bragg grating strain sensor is analyzed. The phenomenon that bandwidth of reflection spectrum largens
the peak value falls
and the reflection sidelobe augment when the performance of FBG sensor degenerates by theoretical deduction and simulation. Then the effect of reflection sidelobe and the loss of link connection on the FBG multiplex demodulation result are analyzed in detailed
aiming at the problem that the solution of using floating demodulation threshold and restraining reflection sidelobe are presented. The experimental results show that
the theory is validity and the method is feasibility
and the accuracy of measuring strain result is greatly improved.