Chinese Optics Letters, 2008, 6 (9): 631, Published Online: Sep. 11, 2008
Fiber Bragg grating hydrophone with high sensitivity Download: 782次
Abstract
A fiber Bragg grating (FBG) hydrophone with high sensitivity was demonstrated. This hydrophone used a rubber diaphragm and a copper hard core as the sensing element. To compensate the hydrostatic pressure, a capillary tube was fixed at the end of the hydrophone. Theoretical analysis of the acoustic pressure sensitivity was given in this letter. Experiments were carried out to test the frequency response of the hydrophone. The result shows that when the Young's modulus of the diaphragm is higher, a flatter frequency response will be obtained.
Wentao Zhang, Yuliang Liu, Fang Li. Fiber Bragg grating hydrophone with high sensitivity[J]. Chinese Optics Letters, 2008, 6(9): 631.