Study on the high-accuracy fluid refractive-index sensor based on an arrayed-waveguide grating

被引：0
作者：
Wang, Youbin [1 ]
Huang, Xuguang [1 ]
机构：
[1] Laboratory of Photonic Information Technology, South China Normal University, Guangzhou
来源：
Guangxue Xuebao/Acta Optica Sinica | 2009年 / 29卷 / 09期
关键词：
Arrayed-wavegaide grating (AWG); Fourier optics; Refractive-index; Sensor;
D O I：
10.3788/AOS20092909.2378
中图分类号：
学科分类号：
摘要：
A high-accuracy fluid refractive-index sensor based on an arrayed-waveguide grating (AWG) is designed. This system measures the refractive-index of a fluid in the groove using the characteristic of the sensibility of the phase shift of arrayed-waveguides. The phase shifts of the arrayed waveguides (AWs) lead to the position change of the maximum of the light intensity in the image plane of the output slab. The high accuracy real-time refractive-index of the fluid can be obtained from the power rate between two output waveguides via a narrow band source. A mathematical model based on the theory of Fourier optics and wave optics is established with reasonable parameters and the consideration of every factor. The analytic expression of the relationship between the refractive-index of the fluid and the power rate is obtained via fitting. The method can eliminate the instability, the inner loss of the instrument and the measurement error caused by the environment to improve the measurement accuracy of refractive index.
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页码：2378 / 2384
页数：6
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共 26 条
  • [1] Jeong G., Kim D., Choi J., Et al., Low-loss compact arrayed waveguide grating with spot-size converter fabricated by a shadow-mask etching technique, ETRI Journal, 27, 1, pp. 89-94, (2005)
  • [2] Kamei S., Iemura K., Kaneko A., Et al., 1.5% athermal arrayed-waveguide grating multi/demultiplexers with very low loss groove design, IEEE Photon. Technol. Lett., 17, 3, pp. 560-588, (2005)
  • [3] Robertson D., Niewczas P., McDonald J.R., Interrogation of a dual fiber Bragg grating sensor using an arrayed waveguide grating, SPIE, 5855, pp. 844-847, (2005)
  • [4] Noram D.C.C., Webb D.J., Pechstedt R.D., Interferometric and fiber Bragg grating sensor interrogation using an arrayed waveguide grating, SPIE, 5459, pp. 101-108, (2004)
  • [5] Sun F.G., Xiao G.Z., Zhang Z.Y., Et al., Modeling of arrayed waveguide grating for wavelength interrogation application, Opt. Commun., 271, 1, pp. 105-108, (2007)
  • [6] Kejalakshmy N., Srinivasan K., Simple method of Brewster-angle measurement for the determination of refractive indices in transparent biaxial crystal, Opt. Eng., 40, 11, pp. 2594-2597, (2001)
  • [7] Yin X., Zhang H., A simple method for measuring refractive indices of crystals-Brewster's angle method, Piezoelectrics & Acoustooptic, 20, 5, pp. 344-346, (1998)
  • [8] Castreion-Pita J.R., Morales A., Castrejon-Garcia R., Critical angle laser refractometer, Rev. Sci. Instrum., 77, 3, (2006)
  • [9] Chen L., Mo D., An overview and prospect on modern spectroscopic ellipsometry, Chinese Journal of Spectroscopy Laboratory, 16, 1, pp. 19-23, (1999)
  • [10] Sun S., Zhang L., Yao X., Principles of ellipsometry and its applications in the characterization of functional thin films, Piezoelectric & Acoustooptics, 20, 3, pp. 209-213, (1998)
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