High resolution instrumentation system for fibre-Bragg grating aerospace sensors

Ezbiri, A.; Kanellopoulos, S.E.; Handerek, V.A.

doi:10.1016/s0030-4018(97)00731-1

Cited by 60 publications

(25 citation statements)

References 8 publications

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“…Using the Vernier scaling, we have more densely spaced spectral channels. A Center of Gravity (CoG) [19], [20] algorithm can be used to increase the accuracy of the device. An equivalent mass value is assigned to each channel intensity: the equivalent mass value is higher when the position of the peak is closer to the center of the channel.…”

Section: Use Of the Device For Peak Detectionmentioning

confidence: 99%

Silicon Photonic Spectrometer for Accurate Peak Detection Using the Vernier Effect and Time-Domain Multiplexing

Ruocco

Thourhout

Bogaerts

2014

J. Lightwave Technol.

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Abstract-We present a silicon-on-insulator spectrometer for wavelength peak detection operating in a 20-nm wavelength band around 1550 nm with an average accuracy of 12 pm. The silicon photonic integrated circuit occupies a footprint of 250 × 700 μm 2 and is composed of a passive-arrayed waveguide grating (AWG) and an array of thermo-optic Mach-Zehnder interferometer switches. The AWG multiplexes multiple inputs and outputs with a vernier design that shifts the spectral response of the different inputs. In this demonstration, we use five output channels and four input channels, with a 4.0-nm channel spacing and 5.0-nm channel spacing, respectively. The responses to the different inputs are disentangled at the outputs by time-multiplexing the inputs with the switches. We demonstrate a more than tenfold improvement in peak detection accuracy using the Vernier effect, from nm range using a single input to picometers range using the four inputs.

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Section: Use Of the Device For Peak Detectionmentioning

confidence: 99%

Silicon Photonic Spectrometer for Accurate Peak Detection Using the Vernier Effect and Time-Domain Multiplexing

Ruocco

Thourhout

Bogaerts

2014

J. Lightwave Technol.

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“…The centroid detection algorithm (CDA) was employed in our experiment to achieve this transformation and improve the system performance and resolution. CDA takes the amplitude weighted mean of the data according to (4) [15] (4) where is the centroid fitted peak value, is the wavelength of the element, and is the amplitude of the element greater than the noise floor .…”

Section: A System Setup and Configurationmentioning

confidence: 99%

800 nm WDM Interrogation System for Strain, Temperature, and Refractive Index Sensing Based on Tilted Fiber Bragg Grating

et al. 2008

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Abstract-A low-cost high-resolution wavelength-division-multiplexing (WDM) interrogation system operating around 800 nm region with operational bandwidth up to 60 nm and resolution of 12.7 pm utilizing a tilted fiber Bragg grating (TFBG) and a CCDarray detector has been implemented. The system has been evaluated for interrogating fiber Bragg grating based strain, temperature sensors, giving sensitivities of 0.59 pm and 5.6 pm C, which are in good agreement with previously reported values. Furthermore, the system has been utilized to detect the refractive index change of sample liquids, demonstrating a capability of measuring index change as small as 10 5 . In addition, the vectorial expression of phase match condition and fabrication of TFBG have been discussed.Index Terms-Optical sensing, strain and temperature sensor, tilted fiber Bragg grating (TFBG), wavelength-division-multiplexing (WDM) interrogation system.

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“…However, the performance of an FBG sensor array, such as the achievable interrogation rate, accuracy, and resolution of each discrete sensor, is determined primarily by the interrogation system deployed. While FBG wavelength measurement has been realised by a number of methods (including interferometry and prism/CCD arrays 3 ), arguably the most common uses a combination of a broadband light source, a tunable filter (either scanning Fabry-Perót or acousto-optic 4 ) and a photodetector. In such 'tuned' schemes, multiplexing is achieved relatively straightforwardly at the expense of measurement resolution and rate.…”

Section: Introductionmentioning

confidence: 99%

Solid state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement

et al. 2013

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This version is available at https://strathprints.strath.ac.uk/43200/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Solid-State interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement ABSTRACTWe present a solid-state FBG array interrogator and multiplexer capable of determining absolute FBG wavelengths and of providing high-speed, high-resolution static and dynamic measurements. Using a described procedure, deployable on multiplexing passive-interferometric schemes, the system is able to determine initial sensor wavelengths and thereafter track wavelength changes with interferometric resolution. The scheme allows high-resolution interrogation of FBG sensor arrays to be applied to many industrial applications, where previously the lack of combined absolute and quasistatic wavelength measurement precluded the use of interferometric techniques. Using a preliminary laboratory embodiment, we demonstrate a wavelength determination accuracy of <0.3 nm and a measurement resolution of 10 fm/√Hz, and propose pathways to improved performance and miniaturisation.

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High resolution instrumentation system for fibre-Bragg grating aerospace sensors

Cited by 60 publications

References 8 publications

Silicon Photonic Spectrometer for Accurate Peak Detection Using the Vernier Effect and Time-Domain Multiplexing

Silicon Photonic Spectrometer for Accurate Peak Detection Using the Vernier Effect and Time-Domain Multiplexing

800 nm WDM Interrogation System for Strain, Temperature, and Refractive Index Sensing Based on Tilted Fiber Bragg Grating

Solid state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement

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