Back
 OPJ  Vol.4 No.4 , April 2014
Numerical Calculation of Seawater Temperature Sensing Based on Polydimethylsiloxane-Coated Microfiber Knot Resonator
Abstract: A seawater temperature sensing method based on polydimethylsiloxane-coated (PDMS-coated) microfiber knot resonator (MKR) is proposed, which has the advantages of high sensitivity and weak salinity dependence. The dependences of the temperature sensitivity on fiber diameter, coating thickness and probing wavelength are theoretically investigated and the range of coating thickness for weak salinity dependence is obtained. By optimizing the parameters of the seawater temperature sensing system, when the probing wavelength is 1550 nm, the fiber diameter is 1 μm, and the coating thickness is 5 μm, the sensitivity can reach to 0.197 nm/°C. Results shown here are beneficial to find the optimal parameters for the temperature sensors with high sensitivity and weak salinity dependence.
Cite this paper: Yang, H. , Wang, S. , Mao, K. , Li, G. and Wang, J. (2014) Numerical Calculation of Seawater Temperature Sensing Based on Polydimethylsiloxane-Coated Microfiber Knot Resonator. Optics and Photonics Journal, 4, 91-97. doi: 10.4236/opj.2014.44009.
References

[1]   Millard, R., Toole, J. and Swartz, M. (1980) A Fast Responding Temperature Measurement System for CTD Applications. Ocean Engineering, 7, 413-427. http://dx.doi.org/10.1016/0029-8018(80)90007-4

[2]   Swift, C.T. (1980) Passive Microwave Remote Sensing of the Ocean—A Review. Boundary-Layer Meteorology, 18, 25-54. http://dx.doi.org/10.1007/BF00117909

[3]   Pereira, D.A. and Fraza, O. (2004) Fiber Bragg Grating Sensing System for Simultaneous Measurement of Salinity and Temperature. Optical Engineering, 43, 299-304. http://dx.doi.org/10.1117/1.1637903

[4]   Xu, F., Horak, P. and Brambilla, G. (2007) Optical Microfiber Coil Resonator Refractometric Sensor. Optics Express, 15, 7888-7893. http://dx.doi.org/10.1364/OE.15.007888

[5]   Xu, F., Pruneri, V., Finazzi, V. and Brambilla, G. (2008) An Embedded Optical Nanowire Loop Resonator Refractometric Sensor. Optics Express, 16, 1062-1067. http://dx.doi.org/10.1364/OE.16.001062

[6]   Guo, X. and Tong, L.M. (2008) Supported Microfiber Loops for Optical Sensing. Optics Express, 16, 14429-14434.
http://dx.doi.org/10.1364/OE.16.014429

[7]   Xu, F. and Brambilla, G. (2008) Demonstration of a Refractometric Sensor Based on Optical Microfiber Resonator. Applied Physics Letters, 92, 101126. http://dx.doi.org/10.1063/1.2898211

[8]   Wu, Y., Rao, Y.J., Chen, Y.H. and Gong, Y. (2009) Miniature Fiber-Optic Temperature Sensors Based on Silica/Polymer Microfiber Knot Resonators. Optics Express, 17, 18142-18147. http://dx.doi.org/10.1364/OE.17.018142

[9]   Zeng, X., Wu, Y., Hou, C.L., Bai, J. and Yang, G.G. (2009) A Temperature Sensor Based on Optical Microfiber Knot Resonator. Optics Communications, 282, 3817-3819. http://dx.doi.org/10.1016/j.optcom.2009.05.079

[10]   Chen, Y., Xu, F. and Lu, Y.Q. (2011) Teflon-Coated Microfiber Resonator with Weak Temperature Dependence. Optics Express, 19, 22923-22928. http://dx.doi.org/10.1364/OE.19.022923

[11]   Wu, Y., Jia, L., Zhang, T.H., Jing, Y.J. and Gong, Y. (2012) Microscopic Multi-point Temperature Sensing Based on Microfiber Double-Knot Resonators. Optics Communications, 285, 2218-2222.
http://dx.doi.org/10.1016/j.optcom.2011.12.107

[12]   Wang, S.S., Wang, J., Li, G.X. and Tong, L.M. (2012) Modeling Optical Micro-Fiber Loops for Seawater Sensing. Applied Optics, 51, 3017-3023. http://dx.doi.org/10.1364/AO.51.003017

[13]   Li, B.B., Wang, Q.Y., Xiao, Y.F., Jiang, X.F., Li, Y., Xiao, L. and Gong, Q. (2010) On Chip, High-Sensitivity Thermal Sensor Based on High-Q Polydimethylsiloxane-Coated Microresonator. Applied Physics Letters, 96, 251109.
http://dx.doi.org/10.1063/1.3457444

[14]   Quan, X.H. and Fry, E.S. (1995) Empirical Equation for the Index of Refraction of Seawater. Applied Optics, 34, 3477-3480.

[15]   Klocek, P. (1991) Handbook of Infrared Optical Materials. Marcel Dekker, New York.

[16]   Chao, C.Y. and Guo, L.J. (2006) Design and Optimization of Microring Resonators in Biochemical Sensing Applications. Journal of Lightwave Technology, 24, 1395-1402. http://dx.doi.org/10.1109/JLT.2005.863333

 
 
Top