René Eisermann
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View article: Fibre-optic thermometry to support the clean energy transition
Fibre-optic thermometry to support the clean energy transition Open
The measurement and control of temperature plays a key role in achieving the European Green Deal targets for a low carbon energy system. Fibre-optic thermometry is an emerging technology that can improve temperature measurement in extreme …
View article: European Partnership in Metrology Project: Photonic and Quantum Sensors for Practical Integrated Primary Thermometry (PhoQuS-T)
European Partnership in Metrology Project: Photonic and Quantum Sensors for Practical Integrated Primary Thermometry (PhoQuS-T) Open
Current temperature sensors require regular recalibration to maintain reliable temperature measurement. Photonic/quantum-based approaches have the potential to radically change the practice of thermometry through provision of in situ trace…
View article: Wafer-Scale Experimental Determination of Coupling and Loss for Photonic Integrated Circuit Design Optimisation
Wafer-Scale Experimental Determination of Coupling and Loss for Photonic Integrated Circuit Design Optimisation Open
We investigate integrated silicon ring resonators with regard to the influence of design parameters and intra-wafer variations. First, we show the effect of different ring radii and gaps between ring and bus waveguide on optical properties…
View article: Fiber-artefact methodology and calibration framework for Brillouin-based fiber sensing
Fiber-artefact methodology and calibration framework for Brillouin-based fiber sensing Open
We propose, and demonstrate, the use of a fiber-optical measurement artefact as a metrological tool for traceable distance calibration of distributed optical fiber sensors. The constructed fiber artefact consists of a lead-in fiber coupled…
View article: Data of Figure 2 - "Photonic and Optomechanical Thermometry"
Data of Figure 2 - "Photonic and Optomechanical Thermometry" Open
"Fig_2a_Spectra_Backround.csv" - Raw data of PIC transmittance and estimated background "Figure_2b,2c - Spectra Section,Fits,Residuals.xls" - PIC transmittance, normalised by the background - Dataset of the lorentz fit for each peak (R1, R…
View article: Data of Figure 3 - "Photonic and Optomechanical Thermometry"
Data of Figure 3 - "Photonic and Optomechanical Thermometry" Open
data of Figure 3: Q-factor (a) and extinction ratio (b) of the three ring resonators (R1, R2, R3) between 1530 nm to 1570 nm for different temperatures (20°C, 50°C, 80°C)
View article: Data of Figure 3 - "Photonic and Optomechanical Thermometry"
Data of Figure 3 - "Photonic and Optomechanical Thermometry" Open
data of Figure 3: Q-factor (a) and extinction ratio (b) of the three ring resonators (R1, R2, R3) between 1530 nm to 1570 nm for different temperatures (20°C, 50°C, 80°C)
View article: Data of Figure 2 - "Photonic and Optomechanical Thermometry"
Data of Figure 2 - "Photonic and Optomechanical Thermometry" Open
"Fig_2a_Spectra_Backround.csv" - Raw data of PIC transmittance and estimated background "Figure_2b,2c - Spectra Section,Fits,Residuals.xls" - PIC transmittance, normalised by the background - Dataset of the lorentz fit for each peak (R1, R…
View article: Photonic and Optomechanical Thermometry
Photonic and Optomechanical Thermometry Open
Temperature is one of the most relevant physical quantities that affects almost all processes in nature. However, the realization of accurate temperature standards using current temperature references, like the triple point of water, is di…
View article: Erratum to: Photonic contact thermometry using silicon ring resonators and tuneable laser-based spectroscopy
Erratum to: Photonic contact thermometry using silicon ring resonators and tuneable laser-based spectroscopy Open
Figure 12: Amplitude spectral density of the surface temperature of the thermostat platform (red) together with the laser wavelength changes converted to mK (using the coefficient 72.3 pm/K).Optical amplitude noise of the laser power witho…
View article: Metrological Characterization of a High-Temperature Hybrid Sensor Using Thermal Radiation and Calibrated Sapphire Fiber Bragg Grating for Process Monitoring in Harsh Environments
Metrological Characterization of a High-Temperature Hybrid Sensor Using Thermal Radiation and Calibrated Sapphire Fiber Bragg Grating for Process Monitoring in Harsh Environments Open
Fiber Bragg gratings inscribed in single crystalline multimode sapphire fibers (S-FBG) are suitable for monitoring applications in harsh environments up to 1900 °C. Despite many approaches to optimize the S-FBG sensor, a metrological inves…
View article: Photonic contact thermometry using silicon ring resonators and tuneable laser-based spectroscopy
Photonic contact thermometry using silicon ring resonators and tuneable laser-based spectroscopy Open
Photonic sensors offer the possibility of purely optical measurement in contact thermometry. In this work, silicon-based ring resonators were used for this purpose. These can be manufactured with a high degree of reproducibility and unifor…
View article: Heat dynamics in optical ring resonators
Heat dynamics in optical ring resonators Open
We present an analytical model for the dynamical self-heating effect in air-cladded optical microring resonators (ORRs). The spatially and time resolved temperature field is calculated by integrating the corresponding boundary value proble…
View article: Monitoring of type IV composite pressure vessels with multilayer fully integrated optical fiber based distributed strain sensing
Monitoring of type IV composite pressure vessels with multilayer fully integrated optical fiber based distributed strain sensing Open
We present the results of distributed fiber optic strain sensing for condition monitoring of a hybrid type IV composite fully wrapped pressure vessel using multilayer integrated optical fibers. Distributed strain sensing was performed for …
View article: Enhanced Distributed Fiber Optic Vibration Sensing and Simultaneous Temperature Gradient Sensing Using Traditional C-OTDR and Structured Fiber with Scattering Dots
Enhanced Distributed Fiber Optic Vibration Sensing and Simultaneous Temperature Gradient Sensing Using Traditional C-OTDR and Structured Fiber with Scattering Dots Open
We present results demonstrating several beneficial effects on distributed fiber optic vibration sensing (DVS) functionality and performance resulting from utilizing standard single mode optical fiber (SMF) with femtosecond laser-inscribed…
View article: C-OTDR Based Quasi-distributed Vibration Sensing Using High Scattering Fiber Segments - Performance for Subhertz Dynamic Strain Events
C-OTDR Based Quasi-distributed Vibration Sensing Using High Scattering Fiber Segments - Performance for Subhertz Dynamic Strain Events Open
Distributed vibration sensing (DVS) based on Rayleigh single pulse optical time-domain reflectometry (C-OTDR) is an attractive and robust method for a variety of sensing applications including geosensing. A key issue for the usability of D…
View article: B7.3 - Distributed Fibre Optic Acoustic and Vibration Sensors for Industrial Monitoring Applications
B7.3 - Distributed Fibre Optic Acoustic and Vibration Sensors for Industrial Monitoring Applications Open
We investigate the usability of distributed fibre optic acoustic sensing (DAS) for innovative and advanced monitoring applications in industrial and civil infrastructure installations.In this paper, we report on our ongoing application-ori…