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理论上推导了光纤法布里-珀罗复合结构传感器的反射光谱条纹对比度与外界介质折射率的关系,并分析了实验参数对传感器灵敏度的影响.利用化学腐蚀渐变折射率多模光纤制作了光纤法布里-珀罗复合结构折射率传感器,空气中的条纹对比度可达30 dB以上,折射率测量的灵敏度达45 dB/RIU(refraction index unit,简RIU)以上.实验结果与理论符合很好.通过理论和实验分析,提出了进一步提高传感器灵敏度的方法.
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关键词:
- 光纤传感器 /
- 法布里-珀罗复合结构 /
- 折射率测量 /
- 灵敏度
Theoretical expressions for analyzing the refractive-index sensitivity of the hybrid optical fiber Fabry-Pérot sensor is developed. Influence of the experimental parameters on the measurement sensitivity is discussed. Hybrid optical fiber Fabry-Pérot sensor is fabricated by chemically etching a graded-index multimode fiber (GI-MMF), fusion splicing it into a single mode fiber, and cleaving the GI-MMF. The fringe contrast exceeds 30 dB and the corresponding measurement sensitivity of refractive index is about 45 dB per refraction index unit. Experimental results are in good agreement with the theoretical ones. It is indicated by the numerical simulations that the performance of this kind of sensor can be further improved.[1] Guo W G, Yang X F, Luo S J, Li Y N, Tu C H, Lü F Y, Wang H J, Li E B, Lü C 2007 Acta Phys. Sin. 56 308 (in Chinese) [郭文刚、杨秀峰、罗绍均、李勇男、涂成厚、吕福云、王宏杰、李恩邦、吕 超 2007 56 308]
[2] Zhou X J, Du D, Gong J J 2005 Acta Phys. Sin. 54 2106 (in Chinese) [周晓军、杜 东、龚俊杰2005 54 2106]
[3] Jiang J, Rao Y J, Zhou C X, Zhu T 2004 Acta Phys. Sin. 53 2221 (in Chinese) [江 建、饶云江、周昌学、朱 涛 2004 53 2221]
[4] Zhu T, Rao Y J, Mo Q J 2006 Acta Phys. Sin. 55 249 (in Chinese) [朱 涛、饶云江、莫秋菊 2006 55 249]
[5] Sharma A K, Jha R, Gupta B D 2007 IEEE Sens. J. 7 1118
[6] Liang W, Huang Y Y, Xu Y, Lee R K, Yariv A 2005 Appl. Phys. Lett. 86 151
[7] Wang Y P, Rao Y J, Ran Z L, Zhu T 2003 Acta Phys. Sin. 52 1432 (in Chinese) [王义平、饶云江、冉曾令、朱 涛 2003 52 1432]
[8] Ng M N, Chen Z H, Chiang K S 2002 IEEE Photon. Technol. Lett. 14 361
[9] Deng C L, Gu Z 2009 Acta Phys. Sin. 58 3230 (in Chinese) [邓传鲁、顾 铮 2009 58 3230]
[10] Jiang D S, Wei R X 2004 Chin. J. Lasers 31 8211(in Chinese) [姜德生、魏仁选 2004 中国激光 31 8211]
[11] Wei T, Han Y K, Li Y J, Tsai H L, Xiao H 2008 Opt. Express 16 5764
[12] Rao Y J, Deng M, Duan D W 2008 Sens. Actuat. A 148 33
[13] Ran Z L, Rao Y J, Liu W J, Liao X, Chiang K S 2008 Opt. Express 16 2252
[14] Gong Y, Zhao T, Rao Y J, Wu Y, Guo Y 2010 Opt. Express 18 15844
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[1] Guo W G, Yang X F, Luo S J, Li Y N, Tu C H, Lü F Y, Wang H J, Li E B, Lü C 2007 Acta Phys. Sin. 56 308 (in Chinese) [郭文刚、杨秀峰、罗绍均、李勇男、涂成厚、吕福云、王宏杰、李恩邦、吕 超 2007 56 308]
[2] Zhou X J, Du D, Gong J J 2005 Acta Phys. Sin. 54 2106 (in Chinese) [周晓军、杜 东、龚俊杰2005 54 2106]
[3] Jiang J, Rao Y J, Zhou C X, Zhu T 2004 Acta Phys. Sin. 53 2221 (in Chinese) [江 建、饶云江、周昌学、朱 涛 2004 53 2221]
[4] Zhu T, Rao Y J, Mo Q J 2006 Acta Phys. Sin. 55 249 (in Chinese) [朱 涛、饶云江、莫秋菊 2006 55 249]
[5] Sharma A K, Jha R, Gupta B D 2007 IEEE Sens. J. 7 1118
[6] Liang W, Huang Y Y, Xu Y, Lee R K, Yariv A 2005 Appl. Phys. Lett. 86 151
[7] Wang Y P, Rao Y J, Ran Z L, Zhu T 2003 Acta Phys. Sin. 52 1432 (in Chinese) [王义平、饶云江、冉曾令、朱 涛 2003 52 1432]
[8] Ng M N, Chen Z H, Chiang K S 2002 IEEE Photon. Technol. Lett. 14 361
[9] Deng C L, Gu Z 2009 Acta Phys. Sin. 58 3230 (in Chinese) [邓传鲁、顾 铮 2009 58 3230]
[10] Jiang D S, Wei R X 2004 Chin. J. Lasers 31 8211(in Chinese) [姜德生、魏仁选 2004 中国激光 31 8211]
[11] Wei T, Han Y K, Li Y J, Tsai H L, Xiao H 2008 Opt. Express 16 5764
[12] Rao Y J, Deng M, Duan D W 2008 Sens. Actuat. A 148 33
[13] Ran Z L, Rao Y J, Liu W J, Liao X, Chiang K S 2008 Opt. Express 16 2252
[14] Gong Y, Zhao T, Rao Y J, Wu Y, Guo Y 2010 Opt. Express 18 15844
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