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The sensitivity of an interferometer based on intermodal interference in photonic crystal fiber (PCF) has been investigated theoretically and numerically. Using the intermodal interference theory and the normalized frequency of PCF, we have analyzed the principle of the method for measuring refractive index by PCF interferomter,and obtained a variation, δns, to show the sensitivity of the PCF interferometer. From the analysis of the underlying physics of δns, we find that air holes of the first layer play an important role on the sensitivity.Compared with the conventional PCF structure,the sensitivity can be improved remarkably via employing large air holes with the shape of a combination of half circle and half oval.
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Keywords:
- photonic crystal fiber /
- intermodal interference /
- gas sensor /
- sensitivity
[1] Knight J C, Birks T A, Russell P S J, Atkin D M 1996 Opt. Lett. 21 1547
[2] Li S G, Liu X D, Hou L T 2003 Acta Phys. Sin. 52 2811(in Chinese)[李曙光、刘晓东、侯蓝田 2003 52 2811]
[3] Zhang X J, Zhao J L, Hou J P 2007 Acta Phys. Sin. 56 4668(in Chinese)[张晓娟、赵建林、侯建平 2007 56 4668]
[4] Huang Y, Zhang W, Wang Y, Huang Y D, Peng J D 2009 Acta Phys. Sin. 58 1731(in Chinese)[黄 俨、张 巍、王 胤、黄翊东、彭江得 2009 58 1731]
[5] Fang X H, Hu M L, Li Y F, Chai L, Wang Q Y 2009 Acta Phys. Sin. 58 2495(in Chinese)[方晓惠、胡明列、栗岩锋、柴 路、王清月 2009 58 2495]
[6] Ju J, Wang Z, Jin W, Demokan M S 2006 IEEE Photon. Technol. Lett. 18 2168
[7] Dobb H, Kalli K, Webb D J 2006 Opt. Commun. 260 184
[8] Fu H Y, Tam H Y, Shao L Y, Dong X Y, Wai P K A, Lu C, Khijwania S K 2008 Appl. Opt. 47 2835
[9] Smolka S, Barth M, Benson O 2007 Opt. Express 15 12783
[10] Li S G, Liu S Y, Song Z Y, Han Y, Cheng T L, Zhou G Y, Hou L T 2007 Appl. Opt. 46 5183
[11] Gayraud N, Kornaszewski L W, Stone J M, Knight J C, Reid D T, Hand D P, Macpherson W N 2008 Appl. Opt. 47 1269
[12] Henningsen J, Hald J 2008 Appl. Opt. 47 2790
[13] Gu W W, Zhao J L, Cui L, Hou J P 2007 Acta Photonica Sinica 36 94 (in Chinese)[顾雯雯、赵建林、崔 丽、侯建平 2007 光子学报 36 94]
[14] Ká Dcˇ ik D, Turek I, Martin Dcˇ ek I, Canning J, Issa N A, Lyytikinen K 2004 Opt. Express 12 3465
[15] Villatoro J, Kreuzer M P, Jha R, Minkovich V P, Finazzi V, Badenes G, Pruneri V 2009 Opt. Express 17 1447
[16] Bourliaguet B, Paré C, mond F, Croteau A 2003 Opt. Express 11 3412
[17] Guo T Y, Lou S Q, Li H L, Yao L, Jian S S 2009 Acta Opt. Sin. 29 511(in Chinese)[郭铁英、娄淑琴、李宏雷、姚 磊、简水生 2009 光学学报 29 511]
[18] Mortensen N A, Folkenberg J R 2003 Opt.Lett. 28 1879
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[1] Knight J C, Birks T A, Russell P S J, Atkin D M 1996 Opt. Lett. 21 1547
[2] Li S G, Liu X D, Hou L T 2003 Acta Phys. Sin. 52 2811(in Chinese)[李曙光、刘晓东、侯蓝田 2003 52 2811]
[3] Zhang X J, Zhao J L, Hou J P 2007 Acta Phys. Sin. 56 4668(in Chinese)[张晓娟、赵建林、侯建平 2007 56 4668]
[4] Huang Y, Zhang W, Wang Y, Huang Y D, Peng J D 2009 Acta Phys. Sin. 58 1731(in Chinese)[黄 俨、张 巍、王 胤、黄翊东、彭江得 2009 58 1731]
[5] Fang X H, Hu M L, Li Y F, Chai L, Wang Q Y 2009 Acta Phys. Sin. 58 2495(in Chinese)[方晓惠、胡明列、栗岩锋、柴 路、王清月 2009 58 2495]
[6] Ju J, Wang Z, Jin W, Demokan M S 2006 IEEE Photon. Technol. Lett. 18 2168
[7] Dobb H, Kalli K, Webb D J 2006 Opt. Commun. 260 184
[8] Fu H Y, Tam H Y, Shao L Y, Dong X Y, Wai P K A, Lu C, Khijwania S K 2008 Appl. Opt. 47 2835
[9] Smolka S, Barth M, Benson O 2007 Opt. Express 15 12783
[10] Li S G, Liu S Y, Song Z Y, Han Y, Cheng T L, Zhou G Y, Hou L T 2007 Appl. Opt. 46 5183
[11] Gayraud N, Kornaszewski L W, Stone J M, Knight J C, Reid D T, Hand D P, Macpherson W N 2008 Appl. Opt. 47 1269
[12] Henningsen J, Hald J 2008 Appl. Opt. 47 2790
[13] Gu W W, Zhao J L, Cui L, Hou J P 2007 Acta Photonica Sinica 36 94 (in Chinese)[顾雯雯、赵建林、崔 丽、侯建平 2007 光子学报 36 94]
[14] Ká Dcˇ ik D, Turek I, Martin Dcˇ ek I, Canning J, Issa N A, Lyytikinen K 2004 Opt. Express 12 3465
[15] Villatoro J, Kreuzer M P, Jha R, Minkovich V P, Finazzi V, Badenes G, Pruneri V 2009 Opt. Express 17 1447
[16] Bourliaguet B, Paré C, mond F, Croteau A 2003 Opt. Express 11 3412
[17] Guo T Y, Lou S Q, Li H L, Yao L, Jian S S 2009 Acta Opt. Sin. 29 511(in Chinese)[郭铁英、娄淑琴、李宏雷、姚 磊、简水生 2009 光学学报 29 511]
[18] Mortensen N A, Folkenberg J R 2003 Opt.Lett. 28 1879
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