U-shaped micro-groove fiber based on femtosecond laser processing for humidity sensing

Abstract

A novel optical fiber sensor with a U-shaped micro-groove structure ablated by femtosecond laser on single-mode fiber for measuring air relative humidity (RH) is reported in this paper. In order to improve the accuracy of sensor, a graphene oxide (GO)/polyvinyl alcohol (PVA) composite film is coated on the surface of micro-groove structure. In the U-shaped micro-groove structure, the remaining core and micro-cavity in the micro-groove make up two major optical propagation paths, forming a Mach-Zehnder interferometer (MZI). The sensor has a good linear response within the RH range of 30%—85%, and the maximum sensitivity can reach 0.638 1 nm/%RH. The effect of temperature on the overall performance of the humidity sensor is also investigated. As a new type of all-fiber device, the sensor shows excellent sensitivity and stability.

References

[1] PeterJT, JonOH. Sensors & Actuators B, 2017, 247: 284

[2] ChengY, XieW-j, YuX, LuH, YangM-h. Chinese Optics Letters, 2013, 11: S10404

[3] ZhangX-k, DengZ-y, XuH-l. Chinese Optics Letters, 2013, 11: 090604

[4] LiuS-q, JiY-k, YangJ, SunW, LiH. Sensors & Actuators A:Physical, 2018, 269: 312

[5] FangG-c, JiaP-g, LiangT, TianQ-l. Optics Communications, 2016, 371: 201

[6] HarithZ, BatumalayM, IrawatiN. Optics, 2017, 144: 257

[7] ChaiJ, LiuQ, LiuJ-x, ZhangD-d. Optical Fiber Technology, 2018, 41: 40

[8] ShaoM, ZangY, QiaoX, FuH, JiaZ-a. IEEE Sensor Journal, 2017, 17: 1302

[9] WangY, YangM-w, WangDN. Optical Society America B, 2010, 27: 370

[10] GongH, WangDN. Optics Letters, 2015, 40: 3516

[11] JiangL, ZhaoL-j, WangS-m, YangJ-p, XiaoH. Optics Express, 2011, 19: 17591

[12] WangJ-f, LiangH-h, JinY-x, DongX-y, JinS-z, ZhangZ-x. Journal of Optoelectronics · Laser, 2013, 24: 1037

[13] HuangC-l, HsiehT-s, WuC-w. Optics, 2018, 156: 696

[14] MaQ-f, TouZ-q, NiK. Sensors & Actuators B: Chemical, 2018, 257: 800

[15] WangY-q, ShenC-y, LouW-m, ShentuF-y. Optics Communications, 2016, 372: 229

[16] ChenM-c, HsuC-l, HsuehT-j. IEEE Electron Device Letters, 2014, 35: 590

[17] SuP-g, ChiouC-f. Sensors & Actuators B: Chemical, 2014, 200: 9

[18] LinW-d, ChangH-m, WuR-j. Sensors & Actuators B: Chemical, 2013, 181: 326

[19] BoriniS, WhiteR, WeiD, AstieyM, HaqueS, SpigoneE, HarrisN, KiviojaJ, RyhanenT. Acs Nano, 2013, 7: 11166

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