Integrated-optical chemical sensor with analog-digital transformation of a signal

A. A. Egorov¹, M. A. Egorov², T. K. Chekhlova², A. G. Timakin²
 

¹ A.M. Prokhorov General Physics Institute, Russian Academy of Sciences

² Peoples' Friendship University of Russia

Received January 19, 2011

 

Abstract. A high-speed integrated-optical chemical sensor, being a part of a device with analog-digital transformation of a signal, is elaborated and investigated experimentally. As it basis an integrated-optical waveguide of a diffusion type with a low attenuation is used. The advantage of the schemes of a measurement is marked, in which the analog signal from the integrated-optical sensor will be transformed to a digital kind with the purpose of consequent processing of digitized data of measurements on the computer. It is established, that at the expense of computer registration of digitized measuring data, the integrated-optical chemical sensor has rather fast time of the response: no more than 0.2 seconds. The perspectives of use of integrated-optical sensor of this type are discussed.

Keywords: integrated-optical waveguide, chemical sensor, laser radiation, electronic comparison circuit, operational amplifier, analog-to-digital conversion, fast Fourier transformation, data processing.