METHODS TO ENHANCE THE SENSITIVITY OF OPTOELECTRONIC SENSORS

В. Г. Вербицький, О. Б. Охрімчук

Abstract


 

The article is devoted to the study of methods for increasing the sensitivity of optoelectronic sensors in gas analyzers. The author considers methods related to the modification of a chamber with a gas mixture through which an optical flow is passed: a method for increasing the resolution of devices, a method for increasing the thickness of the absorbing gas layer, methods for generating and processing an analytical signal. It is proved that among the described methods, the method for increasing the resolution of devices and the method for increasing the thickness of the absorbing gas layer have disadvantages that make it impossible or significantly technically difficult to implement them in practice. At the same time, the method for generating and processing an analytical signal is a promising development and can be implemented in practice. In turn, this method is considered in two variations: differentiation of a variable analytical signal and a calculation method taking into account interfering interference. The first variation is called the two-line method. The second variation is known as the two-beam method. This variation of the analytical signal generation method is used in automatic absorption gas analyzers that use electrical or optical zero signal compensation. Special attention is paid to metamaterials, plasmonic effects, and quantum dots as promising tools for miniaturizing sensors with improved characteristics. The article systematizes modern approaches to increasing the efficiency of sensor systems, and also provides a comparative analysis of their advantages and limitations. It is noted that an interdisciplinary approach to creating new-generation sensors provides higher accuracy, speed, and reliability. Promising areas for further research should be the development of multifunctional sensor systems with dynamic parameter reconfiguration, research into the interaction of optical radiation with hybrid nanostructures, and the introduction of artificial intelligence to increase the accuracy and autonomy of sensor analysis. Thus, the results obtained form the scientific basis for the further development of high-tech sensor platforms with improved metrological characteristics.


Keywords


gas analyzer, optoelectronic device, sensitivity, selectivity, mathematical model, multiple reflection scheme.

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DOI: https://doi.org/10.32620/oikit.2025.104.08

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