Detection of high humidity by optical fibre sensing at telecommunications wavelengths

被引:30
作者
Bownass, DC [1 ]
Barton, JS [1 ]
Jones, JDC [1 ]
机构
[1] Heriot Watt Univ, Dept Phys, Edinburgh EH14 4AS, Midlothian, Scotland
基金
英国工程与自然科学研究理事会;
关键词
fibre-optic sensors; humidity detection; whispering gallery interaction; network monitoring; telecommunications;
D O I
10.1016/S0030-4018(97)00525-7
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We demonstrate the proof of principle for a novel fibre optic sensor for the detection of high humidity. The device uses single-mode fibre at telecommunications wavelengths, making it particularly suitable for application in passive optical networks. The sensing mechanism relies on a humidity-induced refractive index change in an organic film coated onto the cladding of a bent fibre. The sensor was shown to respond at relative humidities > 62% and > 80% using gelatine and polyethylene oxide films respectively, by the onset of a strong interaction between the LP01 mode and a whispering gallery mode. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:90 / 94
页数:5
相关论文
共 15 条
  • [11] Stuart A. D., 1988, International Journal of Optoelectronics, V3, P177
  • [12] WATER SENSOR WITH OPTICAL FIBER
    TOMITA, S
    TACHINO, H
    KASAHARA, N
    [J]. JOURNAL OF LIGHTWAVE TECHNOLOGY, 1990, 8 (12) : 1829 - 1832
  • [13] FIBEROPTIC DUAL-TECHNIQUE SENSOR FOR SIMULTANEOUS MEASUREMENT OF STRAIN AND TEMPERATURE
    VENGSARKAR, AM
    MICHIE, WC
    JANKOVIC, L
    CULSHAW, B
    CLAUS, RO
    [J]. JOURNAL OF LIGHTWAVE TECHNOLOGY, 1994, 12 (01) : 170 - 177
  • [14] WEAR-OUT FAILURE-MECHANISM IN FUSED-FIBER COUPLERS
    WILKINSON, IJ
    [J]. ELECTRONICS LETTERS, 1993, 29 (12) : 1137 - 1139
  • [15] WOSINSKI L, 1994, P SOC PHOTO-OPT INS, V2341, P15, DOI 10.1117/12.195537