The refractive index also depends on the temperature. When the temperature changes between 30∘C∼90∘C, the temperature sensitivity can be up to 10.52pm/∘C. When the refractive index changes between 1.3331 ∼ 1.3568, the maximum refractive index sensitivity is -16.03dB/RIU. The approximation is important for different applications in biomedical optics and optics of tissues. The refractive index of optical glass changes with the temperature. The matrix method was used for the simultaneous measurement of temperature and refractive index. The reflectance spectrum with different temperature and RI were analyzed. Copyright © 2020 Elsevier B.V. or its licensors or contributors. In this paper, a Fabry–Perot (F–P) microcavity sensor based on graded-index few mode fiber is proposed and fabricated. Sensitivities of 1354 ± 14 nm/RIU and -43 ± 4 nm/RIU were achieved for refractive index sensing for the MZI and the MKR components, respectively, in a refractive index range from 1.32823 to 1.33001. We use cookies to help provide and enhance our service and tailor content and ads. The EHect of Temperature and Pressure on the Refractive Index of Some Oxide Glasses Roy M. Waxler and G. W. Cleek Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234.
Simultaneous measurement of temperature and refractive index with F–P microcavity sensor based on graded-index few mode fiber. refractive index in dependence on temperature and wavelength in the spectral range from 200 to 1 000 nm. Simulation and experimental results show that the reflection spectrum will shift regularly with the change of external temperature, and the extinction ratio of that will also change regularly with the change of external solution concentration. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Due to the generation of reflection surface, the F–P microcavity structure is formed between the surfaces of microcavity and the fiber tip. The maximum temperature and RI sensitivity is 10.52pm/∘C, -16.03dB/RIU. (August IS, 1973) The change in refractive index with temperature has … 3. When the refractive index changes between 1.3331∼1.3568, the maximum refractive index sensitivity is -16.03dB/RIU. The effects of cavity length and GI-FMF length on spectra were discussed. https://doi.org/10.1016/j.optcom.2019.124577. The microcavity is formed by hydrofluoric acid etched. The temperature and refractive index can be measured by detecting the wavelength shift and extinction ratio change in spectrum. This fiber F–P microcavity sensor has different responses to the change of temperature and liquid refractive index, it can be used to measure both parameters simultaneously. refractive index, n˜ = n+iκ, of quartz is required where nis the refractive index and κ is the extinction coefficient. Temperature and Refractive Index Sensings. To evaluate its temperature sensing performance, the microfibre device was placed on a hotplate and the temperature was varied between 30–130 °C. Thus, it is best to obtain the refractive index of your sample at the same temperature as the value … The dependence of refractive index on the concentration and temperature in six kinds of aqueous solutions was investigated. The six solutions were three electrolyte solutions (NaCl, KCl, and CaCl2), a polar solution (glucose solution), a nonpolar solution (ethyl acetate solution), and a protein solution (bovine serum albumin solution). With the help of 6 glass specific parameters D0, D1, D2, E0, E1 and λTK, the value of the temperature coefficient of the absolute refractive index (compared to vacuum) as a function of temperature and … A F–P microcavity sensor based on GI-FMF is proposed. This fiber F–P microcavity sensor has different responses to the change of temperature and liquid refractive index, it can be used to measure both parameters simultaneously. One end of the graded-index few mode fiber is etched by hydrofluoric(HF) acid to form an air microcavity. Temperature-dependent refractive index of silicon and germanium Bradley J. Frey *, Douglas B. Leviton, Timothy J. Madison NASA Goddard Space Flight Center, Greenbelt, MD 20771 ABSTRACT Silicon and germanium are perhaps the two most well-understood semiconductor materials … The end with air microcavity is spliced with single-mode fiber, and another end is cut flat to make sensing head. While there have been reports previously on the com-plex refractive index of quartz at room temperature and low temperature [12], little is known on the temperature-dependence of the complex refractive index of quartz in It was found that the microfibre device exhibits a linear response to temperature variation as presented in … By continuing you agree to the use of cookies. © 2019 Elsevier B.V. All rights reserved. Keywords: water refractive index, wavelength dependence, temperature dependence 1.
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