Abstract
In this article, a temperature sensor of single-mode-no-core-single-mode (SNCS) fiber structure coated with polydimethylsiloxane (PDMS) is proposed and investigated. Due to the large thermal expansion coefficient and negative thermal optical coefficient of PDMS, PDMS is used to increase the thermal expansion coefficient of no-core optical fiber (NCF) to improve the temperature sensitivity of the sensor. The temperature sensitivity of the sensor is −260 pm/℃. The simulation is completed on MATLAB. The experimental results and theoretical results are in good agreement. The advantages of simple manufacture, low cost, strong resistance to environmental impact and mechanical damage make it possible to be used in a variety of scenarios.
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