Searched for: subject:"optical%5C+sensor"
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Schenatoa, Luca (author), Aguilar Lopez, J.P. (author), Galtarossa, Andrea (author), Pasutoa, Alessandro (author), Bogaard, T.A. (author), Palmieri, Luca (author)
We present the design and field test of a rugged FBG sensor prototype for high-sensitivity measurement of underground water level. Pressure sensors have many fields of application, ranging from environmental monitoring to the oil and gas industry. In particular, pressure sensors can be used to monitor the stability of dikes and embankments by...
conference paper 2019
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van Paassen, M.M. (author), Borst, C. (author), Ellerbroek, J. (author), Mulder, M. (author), Flach, John M. (author)
Ecological interface design (EID) was originally developed in the context of process control but has been extended into many domains where technology has resulted in both changing work demands and increased opportunities for improved interface applications. This paper gives an overview of the application of the EID to the control of vehicle...
journal article 2018
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Lunglmayr, Michael (author), Castro Do Amaral, G. (author)
Supervision of the physical layer of optical networks is an extremely relevant subject. To detect fiber faults, single-ended solutions, such as the optical time-domain reflectometry (OTDR), allow for precise measurements of fault profiles. Combining the OTDR with a signal processing approach for high-dimensional sparse parameter estimation...
journal article 2018
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Beekers, D.I. (author), van Rooij, Tom (author), van der Steen, A.F.W. (author), de Jong, N. (author), Verweij, M.D. (author), Kooiman, Klazina (author)
Ultrasound contrast agents consist of gas-filled coated microbubbles that oscillate upon ultrasound insonification. Their characteristic oscillatory response provides contrast enhancement for imaging and has the potential to locally enhance drug delivery. Since microbubble response depends on the local acoustic pressure, an ultrasound...
journal article 2018
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Lee, M.J. (author), Ronchini Ximenes, A. (author), Padmanabhan, P. (author), Wang, Tzu Jui (author), Huang, Kuo Chin (author), Yamashita, Yuichiro (author), Yaung, Dun Nian (author), Charbon, E.E.E. (author)
We present a high-performance back-illuminated three-dimensional stacked single-photon avalanche diode (SPAD), which is implemented in 45-nm CMOS technology for the first time. The SPAD is based on a P<sup>+</sup>/Deep N-well junction with a circular shape, for which N-well is intentionally excluded to achieve a wide depletion region, thus...
journal article 2018
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Wang, Q. (author), Giustiniano, Domenico (author), Zuñiga Zamalloa, M.A. (author)
LEDs in our buildings, vehicles, and consumer products are rapidly gaining visible light communication capabilities. LED links however are notorious for being unreliable: shadowing, blockage, mobility, external light, all of these issues<br/>can disrupt the connectivity easily. Therefore, unless a reliable and cost-efficient data link layer is...
journal article 2018
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Dabironezare, S.O. (author), Neto, A. (author), Llombart Juan, N. (author)
Passive imaging cameras at sub-millimeter wave-lengths are currently entering a new era with the development of large format arrays of direct detectors. Several of these arrays are being developed with bare absorbing meshes without any antenna coupling (lens or horn) structures. This paper uses a spectral electromagnetic model to analyze the...
conference paper 2017
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Groves, R.M. (author)
Fibre optic sensors can measure a range of physics and chemical parameters. Some of the more common fibre optic sensors are the fibre Bragg grating (FBG), the long period grating (LPG), the Fabry-Pérot Interferometer (FPI) and various distributed fibre optic sensors based on optical time-domain reflectometry (OTDR) and optical frequency domain...
conference paper 2017
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Hilgersom, K.P. (author), Van Emmerik, T.H.M. (author), Solcerova, A. (author), Berghuijs, W.R. (author), Selker, J.S. (author), Van de Giesen, N.C. (author)
Fibre optic Distributed Temperature Sensing (DTS) is widely applied in earth sciences. Many applications require a spatial resolution higher than the provided by the DTS instrument. Measurements at these higher resolutions can be achieved with a fibre optic cable helically wrapped on a cylinder. The effect of the probe construction, such as its...
journal article 2016
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Sammak, A. (author), Aminian, Mahdi (author), Nanver, L.K. (author), Charbon, E.E.E. (author)
Pure gallium and pure boron (PureGaB) Ge-on-Si photodiodes were fabricated in a CMOS compatible process and operated in linear and avalanche mode. Three different pixel geometries with very different area-to-perimeter ratios were investigated in linear arrays of 300 pixels with each a size of 26 × 26 μm2. The processing of anode contacts at the...
journal article 2016
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Liu, Y. (author), Salemink, H.W.M. (author)
We report the results of a study of an optical sensor based on a channel-drop technique with two cascaded cavities in photonic-crystal slabs. Quality factors and intensities of the resonant modes of the sensor were analyzed with three-dimensional simulations. With the introduction of a reflector in the bus-channel and by control of the coupling...
journal article 2015
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Farshbaf Zinati, F. (author)
Recent developments in the deployment of distributed fiber-optic sensing systems in horizontal wells carry the promise to lead to a new, cheap and reliable way of monitoring production and reservoir performance. Practical applicability of distributed pressure sensing for quantitative inflow detection will strongly depend on the specifications of...
doctoral thesis 2014
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Westerveld, W.J. (author)
We demonstrated that photonic micro-ring resonators can be used in micro-machined ultrasound microphones. This might cause a breakthrough in array transducers for ultrasonography; first because optical multiplexing allows array interrogation via one optical fiber and second because the silicon-on-insulator technology allows cost-effective...
doctoral thesis 2014
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Testa, G. (author), Persichetti, G. (author), Zeni, L. (author), Sarro, P.M. (author), Bernini, R. (author)
Over the last years optofluidics has emerged as a very promising field. The integration at microscopic level between optics and microfluidics provides a number of unique characteristics that cannot be obtained with solid materials only. This paper briefly reviews the state of the art on optofluidics for sensing applications. We first describe...
conference paper 2013
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Westerveld, W.J. (author), Leinders, S.M. (author), Muilwijk, P.M. (author), Pozo, J. (author)
Microscale strain gauges are widely used in micro electro-mechanical systems (MEMS) to measure strains such as those induced by force, acceleration, pressure or sound. We propose all-optical strain sensors based on micro-ring resonators to be integrated with MEMS. We characterized the strain-induced shift of the resonances of such devices....
journal article 2013
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Westerveld, W.J. (author), Leinders, S.M. (author), Van Dongen, K.W.A. (author), Urbach, H.P. (author), Yousefi, M. (author)
Marcatili's famous approximate analytical description of light propagating through rectangular dielectric waveguides, published in 1969, gives accurate results for low-index-contrast waveguides. However, photonic integrated circuit technology has advanced to high-index-contrast (HIC) waveguides. In this paper, we improve Marcatili's model by...
journal article 2012
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Testa, G. (author), Huang, Y. (author), Zeni, L. (author), Sarro, P.M. (author), Bernini, R. (author)
In this work we review recent results of our work on optofluidics. We show that single mode optofluidic waveguides with low loss can be realized using antiresonant reflecting optical confinement (ARROW). These waveguides can be fabricated using full standard silicon technology or hybrid silicon-polymer processes. ARROW waveguides have been used...
conference paper 2012
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Perrotton, C. (author), Javahiraly, N. (author), Slaman, M.J. (author), Dam, B. (author), Meyrueis, P. (author)
A new design of a fiber optic Surface Plasmon Resonance (SPR) sensor using Palladium as a sensitive layer for hydrogen detection is presented. In this approach, a transducer layer is deposited on the outside of a multimode fiber, after removing the optical cladding. The transducer layer is a multilayer stack made of a Silver, a Silica and a...
journal article 2011
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Perrotton, C. (author), Javahiraly, N. (author), Slaman, M. (author), Schreuders, H. (author), Dam, B. (author), Meyrueis, P. (author)
A design to optimize a fiber optic Surface Plasmon Resonance (SPR) sensor using Palladium as a sensitive layer for hydrogen detection is presented. In this approach, the sensitive layer is deposited on the core of a multimode fiber, after removing the optical cladding. The light is injected in the fiber with a given wavelength and all fiber...
conference paper 2011
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Perrotton, C. (author), Slaman, M. (author), Javahiraly, N. (author), Schreuders, H. (author), Dam, B. (author), Meyrueis, P. (author)
An optical fiber using palladium as sensitive layer is characterized in the range of 450 to 900 nm. The sensitive layer is deposited on the outside of a multimode fiber, after removing the optical cladding. The sensor is based on a measurement technique that uses the surface plasmon resonance effect. A continuous change in output intensity is...
journal article 2011
Searched for: subject:"optical%5C+sensor"
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