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提出一种在单模光纤上通过焊接毛细石英管制作法布里-珀罗腔体,并将该F-P腔与特种光纤熔接起来构成微型非本征型光纤F-P干涉压力传感器的方法。实验结果表明,该光纤F-P压力传感器所检测的压力与干涉光相位有着很好的线性关系,而且测试重复性较好,尤其是该结构的干涉传感器对大量程压力导致的膜片应变仍然有着较高的灵敏度。这种光纤压力传感器在光纤传感领域,特别是在水下动态压力测试中具有较大的潜在应用价值。
A method of fabricating a Fabry-Perot cavity by welding capillary quartz tube on a single-mode optical fiber and welding the F-P cavity and a special optical fiber to form a micro-extrinsic fiber F-P interference pressure sensor is proposed. The experimental results show that the pressure detected by the optical fiber FP pressure sensor has a good linear relationship with the phase of the interfering light, and the repeatability of the test is good. Especially, the interference sensor of the optical fiber FP sensor still has a better linearity High sensitivity. This kind of optical fiber pressure sensor has great potential application value in the field of optical fiber sensing, especially under dynamic pressure test under water.