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PACS 05.40.Ca, 07.07.Df, 42.25.Bs, 42.62.-b, 42.82.-m, 89.60.-k

Analysis of sensitivity of an integrated-optical sensor of gaseous substances in the presence of an additive statistic noise

A.A. Egorov,1 T.K. Chekhlova,2 V.I. Grygoruk,3 A.V. Kovalenko

A.M. Prokhorov General Physics Institute, Russian Academy of Sciences

2 Peoples' Friendship University of Russia

3 Taras Shevchenko National University of Kyiv


Received September 8, 2010

Abstract. The dependence of the sensitivity of an integrated-optical waveguide sensor on the length of a waveguide sensor cell, efficiency of input of the laser radiation in a waveguide, absorption cross-section and a level of an additive statistic noise is analyzed. On data of the computer modeling it is established, that the integrated-optical sensor of the given type can find out the contents of gaseous ammonia in the air with the limiting theoretical concentration about 0.1 ppm for an absorption cross-section of researched substance 4∙10-16 ρμ2, the magnitude of the a signal-to-noise relation about 20, length of a sensor cell approximately 4 cm, efficiency of input of a laser radiation in a waveguide not less than 40%.


Keywords: integral optical sensor, chemical sensor, laser radiation, gaseous matter, numerical simulation, random noise.