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空心Bragg光纤可广泛用于气体传感, 但要求它的传输通带处于中红外波段, 以便与待测气体的基频吸收峰匹配. 本文提出了空心Bragg光纤传输通带的一种设计方法与波长控制工艺, 可以实现传输通带在2.512 m内任意波长的空心Bragg光纤的制备. 实验制备出一阶传输通带分别在10.6 m和 3.3 m的光纤样品, 利用截断法测量出其一阶传输通带损耗分别为5.9 dB/m和8.8 dB/m. 利用在传输通带在3.3 m的样品中注入和排出甲烷/氮气混合气体, 观察到了光纤样品透射谱随注入气体浓度的变化, 并用指数稀释法初步测量了该系统的浓度探测极限约为26 ppm, 验证了该光纤应用于气体传感的可行性.In its application of gas sensing, the transmission band of the hollow-core Bragg fiber should match the main absorption peak of the target gas. In this paper, we introduce the design method of the hollow-core Bragg fiber transmission band and develop a fabrication process supporting its transmission band control. Fiber samples with fundamental transmission bands at 10.6 m and 3.3 m are fabricated, whose transmission losses are 5.9 dB/m and 8.8 dB/m, respectively, measured by the cut-back method. Utilizing the fiber sample with a transmission band of 3.3 m, the injection and the expulsion of CH4/N2 gas are realized and observed by the change of fiber transmission spectrum. The detection limit of the experimental system is measured to be 26 ppm for CH4 by exponential dilution method, demonstrating the feasibility of hollow-core Bragg fiber in its application of gas sensing.
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Keywords:
- hollow-core Bragg fiber /
- mid-infrared transmission /
- one-dimensional photonic crystal /
- gas sensing
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[1] Visser J H, Soltis R E 2001 Instrument. Measurem. IEEE Trans.50 1543
[2] Besson J P, Schilt S, Rochat E, Thévenaz L 2006 Appl. Phys. BLasers and Optics 85 323
[3] Kim S S, Young C, Vidakovic B, Gabram-Mendola S, Bayer C W,Mizaikoff B 2010 Sens. J. IEEE 10 145
[4] Stewart G, Atherton K, Yu H B, Culshaw B 2001 Meas. Sci. Technol.21 843
[5] Li R, Loock H P, Oleschuk R D 2006 Anal. Chem. 78 5685
[6] Cao L, Wang C M, Chen Y Q, Yang X H 2006 Acta Phys. Sin. 556354 (in Chinese) [曹琳,王春梅, 陈扬, 杨晓华 2006 55 6354]
[7] Benabid F, Couny F, Knight J C, Birks T A, Russell P S J 2005Nature 434 488
[8] Cubillas A M, Silva-Lopez M, Lazaro J M, Conde O M, PetrovichM N, Lopez-Higuera J M 2007 Opt. Express 15 17570
[9] Hoo Y L, Liu S, Ho H L, Jin W 2010 Photon. Technol. Lett. IEEE22 296
[10] Li X, Pawlat J, Liang J, Ueda T 2010 Sens. J. IEEE 10 1156
[11] Lee K S, Lee Y K, Jang S H 2011 Photon. Technol. Lett. IEEE 23624
[12] Cui J H, Ding H, Li X L, Dong S F, Yang L 2010 Acta Opt. Sin.30 2262 (in Chinese) [崔俊红, 丁晖,李仙丽, 董少飞, 杨乐 2010 光学学报 30 2262]
[13] Mi Y, Hou L T, Zhou G Y, Wang K, Chen C, Gao F, Liu B W, HuM L 2008 Acta Phys. Sin. 57 3583 (in Chinese) [米艳,侯蓝田, 周桂耀, 王康, 陈超, 高飞, 刘博文, 胡明列 2008 57 3583]
[14] Yuan J H, Hou L T, Zhou G Y, Wei D B, Wang H Y, Dong S R,Wang Q Y, Liu B W, Hu M L 2008 Acta Phys. Sin. 57 4203 (inChinese) [苑金辉, 侯蓝田, 周桂耀, 魏东宾, 王海云, 董世蕊, 王清月,刘博文, 胡明列 2008 57 4203]
[15] Temelkuran B, Hart S D, Benoit G, Joannopoulos J D, Fink Y2002 Nature 420 650
[16] Xing W X, Zhang W, Shi L, Wang W, Zhao H, Li Z G, Huang YD, Peng J D 2010 Acta Phys. Sin. 59 8640 (in Chinese) [邢文鑫, 张巍, 石立超, 王雯, 赵红, 李志广, 黄翊东,彭江得 2010 59 8640]
[17] Zachary R, Dana S, Xiang P, Ofer S, Zheng W, Yoel F 2010 Opt.Express 18 15697
[18] Shi L C, Zhang W, Xing W X, Li Z G, Wang W T, Huang Y P,Peng J D 2010 Chin. J. Lasers 37 2559 (in Chinese) [石立超, 张巍, 邢文鑫, 李志广, 王文涛, 黄翊东, 彭江得2010 中国激光 37 2559]
[19] Kim S S, Menegazzo N, Young C, Chan J, Carter C, Mizaikoff B2009 Appl. Spectroscopy 63 331
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