光纤研磨纸粒度对侧边研磨塑料光纤传感器灵敏度的影响

Influence of The Particle Size of Optical Fiber Grinding Paper on The Sensitivity of Edge-lapping Plastic Optical Fiber Sensor

摘要:

为了提高侧边研磨型(D形)塑料光纤倏逝波传感器的灵敏度,采用不同粒度的光纤研磨纸对塑料裸光纤进行侧边研磨,制备了不同直径及不同表面粗糙度的D形塑料光纤倏逝波传感器。实验观测了D区表面形貌、D区直径与表面粗粗度对传感器光传输性能及灵敏度的影响。实验研究发现:D形敏感区域直径及表面粗糙度对传感器光传输及灵敏度影响显著；传感器灵敏度随着D区直径的减小先增大后减小,当D区直径为1200μm时,传感器对葡萄糖溶液的响应灵敏度达到最大值:-0.0032(mg/L)-1；当采用粒度为9μm的光纤研磨纸对光纤进行研磨时,传感器的灵敏度将进一步提升至-0.0045(mg/L)-1,是未经研磨塑料光纤传感器灵敏度的11.25倍。

Abstract:

In order to improve the sensitivity of the edge-lapping (D-shaped) plastic optical fiber (POF) evanescent wave sensor, the optical fiber grinding paper with different particle diameters was used to grind the uncoated POFs to prepare D-shaped POF evanescent wave sensors with different diameters and different surface roughness. The surface morphology of the D-shaped region was checked, and the effects of the diameter and surface roughness of the D-shaped region on the light transmission and sensitivity of the sensors were investigated experimentally. Experimental results indicate that the diameter and surface roughness of the D-shaped sensitive region have a significant effect on the light transmission and sensitivity of the sensor. The sensitivity increases first and then decreases as the diameter of the D-shaped region decreases, and when the diameter is 1200μm, the sensor's response sensitivity to glucose solution reaches a maximum of -0.0032(mg/L)-1; when the D-shaped region is polished with the fiber optic paper with the particle size of 9μm, the sensor's sensitivity will be further improved to -0.0045(mg/L)-1, which is 11.25 times of that of POF sensor without grinding.