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A trace gas sensor based on all optical quartz-enhanced photoacoustic spectroscopy (QEPAS) is designed and demonstrated. An extra detection light beam is added to the traditional QEPAS setup to convert the amplitude of vibration of the quartz tuning fork, which is proportional to the concentration of the target gas, into the variation of the detection light intensity. As a result, there are not any electrical components near the measurement position. Such a design makes it immune to electromagnetic interference and provides a compact sensor head, which can be used in a tiny space or an adverse environment. Using the new setup to measure the water concentration in air, the obtained noise equivalent absorption coefficient is 1.13×10-6 cm-1W/√Hz. The approaches to further optimizing the system and improving the sensitivity are also discussed in detail.
[1] Khorsandi A, Shabani Z, Ranjbar M, Salati H 2012 Chin. Phys. B 21 064213
[2] Kan R F, Dong F Z, Zhang Y J, Liu J G, Wang M, Gao S H, Chen J, Liu C 2005 Chin. Phys. B 14 1904
[3] Dong L, Zhang L, Dou H P, Yin W B, Jia S T 2008 Chin. Phys. B 17 0152
[4] Kosterev A A, Bakhirkin Y A, Curl R F, Tittel F K 2002 Opt. Lett. 27 1902
[5] Liu K, Guo X, Yi H, Chen W, Zhang W, Gao X 2009 Opt. Lett. 34 1594
[6] Dong L, Kosterev A A, Thomazy D, Tittel F K 2010 Appl. Phys. B 100 627
[7] Wang G S, Yi H M, Cai T D, Wang L, Tan T, Zhang W J, Gao X M 2012 Acta Phys. Sin. 61 120701 (in Chinese) [王贵师, 易红明, 蔡廷栋, 汪磊, 谈图, 张为俊, 高晓明 2012 61 120701]
[8] Dong L, Lewicki R, Liu K, Buerki P R, Weida M J, Tittel F K 2012 Appl. Phys. B 107 275
[9] Dong L, Wright J, Peters B, Ferguson B A, Tittel F K, Mcwhorter S 2012 Appl. Phys. B 107 459
[10] Dong L, Spagnolo Vm Lewicki R, Tittel F K 2011 Opt. Express 19 24037
[11] Sharma R C, Kumar D, Bhardwaj N, Gupta S, Chandra H, Maini A K 2013 Opt. Commun. 309 44
[12] Pohlkötter A, Willer U, Bauer C, Schade W 2009 Appl. Opt. 48 B119
[13] An L S, Li L, Li Q C 2002 Applied Optics (Beijing: Beijing Institute of Technology Press) p3 (in Chinese) [安连生, 李林, 李全臣 2002 应用光学(北京: 北京理工大学出版社)第3页]
[14] Liang Y Y, Yang G G 2004 Opt. Instrum. 26 7 (in Chinese) [梁宜勇, 杨国光 2004 光学仪器 26 7]
[15] Wu H P, Dong L, Zheng H D, Liu Y Y, Ma W G, Zhang L, Wang W Y, Zhu Q K, Yin W B, Jia S T 2013 Acta Phys. Sin. 62 070701 (in Chinese) [武红鹏, 董磊, 郑华丹, 刘研研, 马维光, 张雷, 王五一, 朱庆科, 尹王保, 贾锁堂 2013 62 070701]
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[1] Khorsandi A, Shabani Z, Ranjbar M, Salati H 2012 Chin. Phys. B 21 064213
[2] Kan R F, Dong F Z, Zhang Y J, Liu J G, Wang M, Gao S H, Chen J, Liu C 2005 Chin. Phys. B 14 1904
[3] Dong L, Zhang L, Dou H P, Yin W B, Jia S T 2008 Chin. Phys. B 17 0152
[4] Kosterev A A, Bakhirkin Y A, Curl R F, Tittel F K 2002 Opt. Lett. 27 1902
[5] Liu K, Guo X, Yi H, Chen W, Zhang W, Gao X 2009 Opt. Lett. 34 1594
[6] Dong L, Kosterev A A, Thomazy D, Tittel F K 2010 Appl. Phys. B 100 627
[7] Wang G S, Yi H M, Cai T D, Wang L, Tan T, Zhang W J, Gao X M 2012 Acta Phys. Sin. 61 120701 (in Chinese) [王贵师, 易红明, 蔡廷栋, 汪磊, 谈图, 张为俊, 高晓明 2012 61 120701]
[8] Dong L, Lewicki R, Liu K, Buerki P R, Weida M J, Tittel F K 2012 Appl. Phys. B 107 275
[9] Dong L, Wright J, Peters B, Ferguson B A, Tittel F K, Mcwhorter S 2012 Appl. Phys. B 107 459
[10] Dong L, Spagnolo Vm Lewicki R, Tittel F K 2011 Opt. Express 19 24037
[11] Sharma R C, Kumar D, Bhardwaj N, Gupta S, Chandra H, Maini A K 2013 Opt. Commun. 309 44
[12] Pohlkötter A, Willer U, Bauer C, Schade W 2009 Appl. Opt. 48 B119
[13] An L S, Li L, Li Q C 2002 Applied Optics (Beijing: Beijing Institute of Technology Press) p3 (in Chinese) [安连生, 李林, 李全臣 2002 应用光学(北京: 北京理工大学出版社)第3页]
[14] Liang Y Y, Yang G G 2004 Opt. Instrum. 26 7 (in Chinese) [梁宜勇, 杨国光 2004 光学仪器 26 7]
[15] Wu H P, Dong L, Zheng H D, Liu Y Y, Ma W G, Zhang L, Wang W Y, Zhu Q K, Yin W B, Jia S T 2013 Acta Phys. Sin. 62 070701 (in Chinese) [武红鹏, 董磊, 郑华丹, 刘研研, 马维光, 张雷, 王五一, 朱庆科, 尹王保, 贾锁堂 2013 62 070701]
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