Optical fiber sensor for temperature measurement based on Silicon thermo-optics effect

Ge, Yixian; Liu, Qingquan; Chang, Jianhua; Zhang, Jiahong

doi:10.1016/j.ijleo.2013.05.156

Cited by 14 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Temperature sensing with this same platform relies on light coupled into noncavity regions of the device, which consist mostly of silicon. Here, the FP resonance peaks shift with temperature because of the positive thermo-optic coefficient of silicon ( 31 ). Tracking temperature is important for the application of bioresorbable FPI pressure sensors as well, as the changes in surrounding temperature induce volumetric changes of the air inside the cavity, thereby adding a temperature-dependent response to the pressure sensor output (see note S3 and fig.…”

Section: Resultsmentioning

confidence: 99%

Bioresorbable optical sensor systems for monitoring of intracranial pressure and temperature

et al. 2019

View full text Add to dashboard Cite

Continuous measurements of pressure and temperature within the intracranial, intraocular, and intravascular spaces provide essential diagnostic information for the treatment of traumatic brain injury, glaucoma, and cardiovascular diseases, respectively. Optical sensors are attractive because of their inherent compatibility with magnetic resonance imaging (MRI). Existing implantable optical components use permanent, nonresorbable materials that must be surgically extracted after use. Bioresorbable alternatives, introduced here, bypass this requirement, thereby eliminating the costs and risks of surgeries. Here, millimeter-scale bioresorbable Fabry-Perot interferometers and two dimensional photonic crystal structures enable precise, continuous measurements of pressure and temperature. Combined mechanical and optical simulations reveal the fundamental sensing mechanisms. In vitro studies and histopathological evaluations quantify the measurement accuracies, operational lifetimes, and biocompatibility of these systems. In vivo demonstrations establish clinically relevant performance attributes. The materials, device designs, and fabrication approaches outlined here establish broad foundational capabilities for diverse classes of bioresorbable optical sensors.

show abstract

Section: Resultsmentioning

confidence: 99%

Bioresorbable optical sensor systems for monitoring of intracranial pressure and temperature

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This type of temperature sensor is widely used as a mechanical switch for temperature control, usually, know as thermostats. [10] Few millimeters/minutes 0.1 °C Biomaterial [11,12] Few millimeters/seconds 0.1 °C Gas thermometers [13] Centimeters/minutes 0.001 K Acoustic [14][15][16][17][18] Centimeters/milliseconds 0.1 °C Electrical Thermocouple [19,20] 0.02-5 mm/50 ms-1 min 0.1 °C RTD [20,21] Few millimeters/minutes 0.001 °C Thermistor [13,21] 1-10 mm/20-300 s 0.01 °C (low span, 50 °C) Semiconductor junction [22] Few millimeters/minutes 0.5 °C Optical Optical fiber [23,24] millimeters 1D/millisecond 0.05-0.1 °C Thermoreflectance [25][26][27] 10 μm/down to ms 0.1-1.1 °C Liquid crystal [28][29][30][31] 2D/less than 1 s 0.5-0.9 °C Thermo-and photoluminescence [32][33][34][35] 2D observed temperature fields 1-31 °C Interferometry [36][37][38] 2D/milliseconds or less 2% (temperature in K) IR thermography [39][40][41] 40 μm-1 mm (2D)/down to ms 18 mK Temperature-sensitive paints (TSP) [41] 5 μm-1 mm (2D)/down to ms 0.4 °C 2.1.1.3 Gas thermometers Such mechanical thermometers are based on the variation in the pressure or volume when a fluid changes the temperature [13]. Basically, two types of fluid states are used, gas state or saturated state.…”

Section: Bimaterials Methodsmentioning

confidence: 99%

“…Optical techniques for temperature measurement are a set of emerging techniques that potentialize new applications hardly solved by mechanical or electrical temperature sensors. Their main advantages are noncontact temperature measurements, easy integration for obtaining high-resolution 2D temperature fields, fast response time and high immunity to electromagnetic interference [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Optical Temperature Measurement Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Heat transfer coefficient: a review of measurement techniques

Moreira

Colmanetti

Tibiriçá

2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Heat transfer coefficient is a basic parameter used in the calculation of convective heat transfer problems. Due to the importance of the experimental measurements for the development of convective heat transfer, this review identifies, classifies and describes the experimental methods used for the measurement of heat transfer coefficient. The methods were classified into five major groups: (1) direct method, (2) transient method, (3) Wilson method, (4) heat/momentum/mass transfer analogy method and (5) boundary layer thickness method. Their applications, limitations and the reported accuracy were evaluated in the context of new developments in temperature and heat flux measurement techniques. Finally, this review provides criteria for the selection of the most suitable technique for measurements of heat transfer coefficient according to the aspects of spatial resolution, geometric scale, intrusiveness, fluid type, response time and accuracy. Keywords Heat transfer coefficient • Temperature • Heat flux • Convection • Experimental measurements List of symbols 1D One-dimensional 2D Two-dimensional A Surface area (m 2) A e Outer tube surface area (m 2) A i Inner tube surface area (m 2) A s Surface area (m 2) C e Thermal resistances outside the tube and the tube wall (K/W) (constant) C i Constant C f Fanning friction factor (-), C f = s V 2 ∕2 c Constant (-) c p Specific heat capacity (J/kg K) c p,i Specific heat capacity at constant pressure (J/ kg K) d Diameter (m) d e Outer tube diameter (m) d i Inner tube diameter (m) D m Mass diffusivity (m 2 /s) f Darcy friction factor (-), f = 4 ⋅ C f * Cristiano Bigonha Tibiriçá

show abstract

“…The sensor improved the sensitivity performance for RH and temperature. G. Yixian et al [22] have presented an optical sensor for measuring the temperature, based on the basic principle of Fabry-Perot interferometer. The measurement mechanism found the relation between temperature measurement range and the thickness of single crystal diaphragm.…”

Section: Introductionmentioning

confidence: 99%