Silver Halide- and Quartz-Based Infrared Fiber Sensor for Measuring Moisture Content in Transformer Oil

Abstract

The paper presents a fiber-optic sensor, which allows determining the moisture content using the method of attenuation total reflection (ATR) Fourier transform infrared spectroscopy in the wavelength range from 1.2 to 6.5 μm. The fiber sensor comprises of a transmitting fiber bundle, a receiving one, and an ATR element. The modeling results of the sensor are given. The geometric parameters of the ATR cone were estimated depending on the fiber bundle's size. The optical losses of each fiber element were calculated and the total output power of the receiving bundle was estimated.