Journal ArticleDOI
Effect of temperature on optical fiber transmission
Wing F. Yeung,Alan R. Johnston +1 more
TLDR
The data show that the intrinsic transmission of a CVD fiber is independent of temperature over the -110 to +150 C range.Abstract:
Results are presented concerning the effects of temperature on the transmission properties of various optical fibers including a silicone plastic clad, an acrylic plastic clad, and CVD step-index fibers both with and without polyurethane jackets Results are presented for the normalized transmitted power vs temperature, the index of refraction vs temperature, and induced attenuation coefficients vs temperature The data show that the intrinsic transmission of a CVD fiber is independent of temperature over the -110 to +150 C range Plastic clad fused silica fibers are subject to transmission losses at lower temperatures due to changes in the optical index of the cladding polymer Acrylic-clad and plastic-clad silica fibers also show transmission losses at lower temperatures, but to lesser extentsread more
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Patent
Fiber optic temperature sensing
TL;DR: Fiber optic waveguides exhibiting a blackout phenomenon can be used for temperature sensing as mentioned in this paper, which can be applied in such applications as maintaining a material within a selected temperature range, freeze protection viscosity control of liquids in pipelines, leak detection of cryogenic fluids, fire detection, application of heat-recoverable materials, battery charging, and fluid level detection.
Journal ArticleDOI
Bending loss and thermo-optic effect of a hybrid PDMS/silica photonic crystal fiber
TL;DR: Numerical simulations and experimental measurements were carried out to investigate the fundamental TIR-based guiding mechanism of the hybrid PDMS/silica PCF in terms of effective index, effective modal area and loss.
Patent
Thermostatic fiber optic waveguides
TL;DR: In this article, the authors used fiber optic waveguides exhibiting a blackout phenomenon for temperature sensing, which can be used for maintaining a material within a selected temperature range, freeze protection, viscosity control of liquids in pipelines, leak detection of cryogenic fluids, fire detection, application of heat-recoverable materials, and fluid level detection.
Journal ArticleDOI
Sun-induced chlorophyll fluorescence I: Instrumental considerations for proximal spectroradiometers
Javier Pacheco-Labrador,Andreas Hueni,Laura Mihai,Karolina Sakowska,Tommaso Julitta,Joel Kuusk,Dan Sporea,Luis Alonso,Andreas Burkart,M. Pilar Cendrero-Mateo,Helge Aasen,Yves Goulas,Alasdair Mac Arthur +12 more
TL;DR: A framework to model the impact of different instrument noise and bias on the retrieval of SIF; and to assess uncertainty requirements for the calibration and characterization of state-of-the-art SIF-oriented spectroradiometers is provided.
Journal ArticleDOI
Whispering-gallery mode composite sensors for on-chip dynamic temperature monitoring
TL;DR: In this paper, a WGM sensor was used for on-chip real temperature measurement, and the effects of sensor size on the accuracy were discussed and verified through an expansion of the current theory of WGM resonance shifts to include composite materials.