Interference characteristics analysis of optical fiber Fabry-Perot cavity with graphene diaphragm
LI Cheng1,2, GUO Tingting1,2, XIAO Jun1,2, FAN Shangchun1,2, JIN Wei3
1. Novel Inertial Instrument & Navigation System Technology Key Laboratory of Fundamental Science for National Defense, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
3. Department of Electrical Engineering, The Hong Kong Polytechnic University, Jiulong, China
With regard to the design of optical fiber Fabry-Perot cavity using graphene as sensitive diaphragm, the deflection change under uniformly distributed loads in graphene film was analyzed by finite element method based on the large deflection elastic theory of circular film. The pressure-sensing mathematical model of optical fiber Fabry-Perot cavity with graphene diaphragm was established based on the working principle of Fabry-Perot interferometer. The effects of graphene film layer and incident light angle on the film reflectivity were obtained according to the refractive index characteristics of the film. Then the interference spectra change, caused by both the cavity length losses and the film deflection deformations under the pressure loads, were analyzed. The simulation results show that adding the film layer can increase the film reflectivity and further improve the optical interference performance; however, a decreasing effect on the deflection deformation is caused by the film layer with the increase of pressure load. Thus, an 8 layer graphene film can achieve a reflectivity of 0.715% and an approximate theoretical sensitivity of 10nm/kPa for a 40μm Fabry-Perot cavity length with a membrane diameter of 25μm. It provides a theoretical basis for the design and fabrication of high-sensitivity fiber-tip pressure sensor with multiple-layer graphene diaphragm.
李成, 郭婷婷, 肖俊, 樊尚春, 靳伟. 基于石墨烯膜的光纤Fabry-Perot腔干涉特性分析[J]. 北京航空航天大学学报, 2015, 41(4): 574-579.
LI Cheng, GUO Tingting, XIAO Jun, FAN Shangchun, JIN Wei. Interference characteristics analysis of optical fiber Fabry-Perot cavity with graphene diaphragm. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2015, 41(4): 574-579.
Novoselov K S, Geim A K,Morozov S V,et al.Electric field effect in atomically thin carbon films[J].Science,2004,306(5696):666-669.
[2]
Liang X, Sperling B A,Calizo I,et al.Toward clean and crackless transfer of graphene[J].ACS Nano,2011,5(11):9144-9153.
[3]
Lee C, Wei X D,Kysar J W,et al.Measurement of the elastic properties and intrinsic strength of monolayer graphene[J].Science,2008,321(5887):385-388.
[4]
Nair R R, Blake P,Grigorenko A N,et al.Fine structure constant defines visual transparency of graphene[J].Science,2008,320(5881):1308.
[5]
袁小亚. 石墨烯的制备研究进展[J].无机材料学报,2011,26(6):561-570. Yuan X Y.Progress in preparation of graphene[J].Journal of Inorganic Materials,2011,26(6):561-570(in Chinese).
[6]
Martins L G P, Song Y,Zeng T,et al.Direct transfer of graphene onto flexible substrates[J].Proceedings of the National Academy of Sciences,2013,110(44): 17762-17767.
[7]
Bunch J S, Verbridge S S,Alden J S,et al.Impermeable atomic membranes from graphene sheets[J].Nano Letters,2008,8(8):2458-2462.
[8]
Smith A D, Vazirs S,Delin A,et al.Strain engineering in suspended graphene devices for pressure sensor application[C]//Proceedings of the 13th International Conference on Ultimate Integration on Silicon.Grenoble,France:IEEE,2012:21-24.
[9]
Kwon O K, Lee J H,Kim K S,et al.Developing ultrasensitive pressure sensor based on graphene nanoribbon:molecular dynamics simulation[J].Physica E:Low-Dimensional Systems and Nanostructures,2013,47:6-11.
[10]
Ma J,Jin W, Ho H L,et al.High-sensitivity fiber-tip pressure sensor with graphene diaphragm[J]. Optics Letters,2012,37(13): 2493-2495.
[11]
Ma J, Xuan H F,Ho H L,et al.Fiber-optic Fabry-Perot acoustic sensor with multilayer graphene diaphragm[J].IEEE Photonics Technology Letters,2013,25(10):932-935.
[12]
Beams J W. The structure and properties of thin film[M].New York:John Wiley and Sons,1959:183-190.
[13]
Zhou X, Yu Q.Wide-range displacement sensor based on fiber-optic Fabry-Perot interferometer for subnanometer measurement[J].IEEE Sensors Journal,2011,11(7):1602-1606.
[14]
唐晋发,顾培夫. 薄膜光学与技术[M].北京:机械工业出版社,1989:5-24. Tang J F,Gu P F.Thin film optics and technology[M].Beijing:China Machine Press,1989:5-24(in Chinese).
[15]
Nelson F J, Kamineni V K,Zhang T,et al.Optical properties of large-area polycrystalline chemical vapor deposited graphene by spectroscopic ellipsometry[J].Applied Physics Letters,2010,97(25):253110.
[16]
Ma C, Dong B,Gong J,et al.Decoding the spectra of low-finesse extrinsic optical fiber Fabry-Perot interferometers[J].Optics Express,2011,19(24):23727-23742.
2015, Vol. 41 
