Abstract
Optical sensors are used to sense any change in environmental conditions. They utilize the measurand into changing some attributes of a light ray passing through an optical fiber. This change may be intensity, phase, state of polarization or a wavelength. This change is used for detection at the receiving end according to physical parameters. Fiber Bragg grating (FBG) sensors are one of the most commonly used sensors in optical communication. FBG sensor is mainly used for sensing temperature and strain. This paper focuses mainly on FBG optical sensor used as temperature sensor. The principle of FBG has been explained in detail for temperature sensing. The change in temperature with respect to change in thermo-optic coefficient has been analyzed. The sensed information has been retrieved at the user end using optical fiber cable (OFC) and free space optic (FSO) channels. A beam of light travelling through the OFC cable is called as a wired optical communication, whereas the FSO can be said as wireless communication. The performance of OFC and FSO channels has been compared for sensing the data from the FBG sensor using OptiSystem 16.0 Simulation Software. The contribution of the paper is threefold: (i) determination of the thermo optic coefficient and the range of temperature dependent on this coefficient for the FBG, (ii) comparison of the performances of sensed data transmission over OFC and FSO channel and (iii) evaluation of an analog link used to transmit and receive the measurand.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
