Fiber-optic temperature sensor based on Fabry-Perot interferometer
Maria A. Chesnokova1, Danil I. Nurmukhametov1, Roman S. Ponomarev1;
1Laboratory of Integral Photonics, Perm State University, Perm 614068, Russia
Abstract
The paper presents a simple and affordable method for manufacturing a fiber-optic temperature sensor based on a Fabry-Perot end interferometer made in the form of a polymer "bridge", part of which is a sensitive element of the sensor. The main criterion for the material used in the creation of the sensitive part was its transparency for visible light and the near-infrared range, this condition corresponds to the UV-curable resin. The sensor's operability was checked using an optical spectrum analyzer. The peaks and dips visible in the reflection spectrum of the broadband radiation source testified to the correct operation of the Fabry-Perot interferometer, and their displacement during the change. As a result of the work, a sensor with the parameters of a sensitive element was obtained: length – 51.2 μm, diameter – 32 μm, the sensitivity of which is 44 pm/℃, which is higher than that of existing quartz glass-based analogues. The sensor's dimensions allow it to be used for high-precision and minimally invasive temperature measurements in biology for monitoring microscale samples and in medicine for operations using high-power lasers. In addition, the dependence of the number of interference peaks on the length of the sensitive part was found, which is in good agreement with the theory of Fabry-Perot interferometers.
Speaker
Maria Chesnokova
Laboratory of Integral Photonics, Perm State University, Perm 614068, Russia
Russia
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