Cost effective FBG based optical sensor

Abstract

Cost Effective FBG Based Optical SensorUDK 681.586.5 IFAC 4.2.2Original scientific paperFiber Bragg Grating (FBG) based sensors constitute majority of optical sensors for measuring physical values such as strain, temperature, or both. While properties of FBG alone are well known, interrogation techniques have not been standardized. Most sensors use expensive equipment, such as optical spectrum analyzers, for measuring Bragg wavelength changes as a result of strain, or temperature change. Such method is reliable and gives good results, but cannot be used if we are to construct a cost effective sensor whose use could be widespread. In this paper we demonstrate an alternative way of measuring Bragg wavelength shift that could allow us to build cheap, reliable sensor. Furthermore, the proposed sensor can be thermally stabilized without additional resources. Sensor can, finally, be multiplexed offering quasi-distributed monitoring of smart structures while further reducing the cost.

An Effective Temperature Monitoring Scheme Using ANN-Based Fiber Bragg Grating Sensor

“…There are various kinds of FBGs such as uniform, apodized, pi-phase shifted [4] and each has different sensitivity and bandwidth. In this paper, a uniform FBG sensor, which has a constant grating period is used and is considered to be excellent strain and temperature sensing device [5][6][7].…”