Phase shift response of birefringent PANDA fiber after the end of thermal exposure during recovery to ambient temperatur
- PDF / 1,627,113 Bytes
- 14 Pages / 439.37 x 666.142 pts Page_size
- 58 Downloads / 123 Views
Phase shift response of birefringent PANDA fiber after the end of thermal exposure during recovery to ambient temperature Martin Kyselak1 · Filip Dvorak2 · Jan Maschke1 · Cestmir Vlcek1 Received: 21 May 2020 / Accepted: 3 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The aim of this work is to point out the current possibilities of using polarized light in sensor technology. Furthermore, the aim is to demonstrate the possibility of using the fiber sensor of thermal field disturbance as a truly feasible biomedical sensor applicable in medicine and especially to analyse different ways of measuring polarization changes. This paper concludes theoretical and experimental study deal with temperature response of birefringent fiber. It is supposed to use it for design of sensor of temperature disturbance. The paper follows up on the previous works, where the response of the birefringent PANDA fiber to thermal exposure in the temperature range from 0 to 48 °C was studied. These experiments analyzed the dynamic sensitivity characteristic of birefringent fiber for the process of thermal source apposition. The present paper brings a detailed comparative analysis of fiber response to the processes of apposition and the removal of thermal source, which are evaluated from the point of view of the system’s response after the ending of the thermal exposure. For practical use in fiber recovery analyses, the phase development rotation senses are described on the observable Poincaré sphere. Keywords Thermal exposure · Optical fiber sensor · Phase shift · Observable poincare sphere
1 Introduction The response of the optical fiber to the apposition of an exposure body is briefly described in the introduction as the result of previous work (Kyselak et al. 2017a, b, 2018a, b). The sensor uses the properties of polarization-maintaining optical fibers for different speeds of light propagation in two orthogonal axes. The principle is therefore the polarization sensor described, for example, in Ding et al. (2011), Tang et al. (2006), Zhang and Lit (1993). The * Martin Kyselak [email protected] 1
Department of Electrical Engineering, Faculty of Military Technology, University of Defence in Brno, Brno, Czechia
2
Department of Communication Technologies, Electronic Warfare and Radiolocation, Faculty of Military Technology, University of Defence in Brno, Brno, Czechia
13
Vol.:(0123456789)
422
Page 2 of 14
M. Kyselak et al.
next chapter follows up on this part and completes the overall experimental part with an evaluation and analytical description of the fiber response to the ending of the exposure, i.e. during fiber recovery and its stabilization at the ambient temperature after thermal exposure. The process of recovery differs mainly because of the necessity to also consider other mechanisms than only the thermal transfer by radiation. In the final part, the courses of phase development during the exposure and the response are compared. Thermal exposure was realized by mea
Data Loading...
