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TOM10 S6: Applications of Optics and Photonics II
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| Presentations | ||
10:45am - 11:15am
Invited ID: 429 / TOM10 S6: 1 TOM 10 Applications of Optics and Photonics Invited - Novel Forward Brillouin Scattering measurement technique based on high-Q fiber ring resonator. 1Laboratory of Fiber Optics, ICMUV, Universitat de València, Spain; 2Departament de Física Aplicada i Electromagnetisme, Universitat de València, Spain The conventional detection of Forward Brillouin Scattering (FBS) in optical fibers requires of interferometric techniques using lengths of tens of meters. In this paper, we demonstrate an alternative approach that provides efficient and high-resolution detection of FBS signals, while using just a 20 cm length section of bare fiber. It consists of a pump and probe scheme using a fiber ring resonator as the interrogation system of the mechanical vibration, which modulates the resonances. The result is an amplitude modulated optical trace which allows the detection of resonances R_(0,m) and TR_(2,m). 11:15am - 11:30am
ID: 235 / TOM10 S6: 2 TOM 10 Applications of Optics and Photonics Low Coherence Interferometry Measurement: An Algorithm for fast processing with low noise and phase linearisation INESC TEC, Portugal This work proposes a signal processing algorithm to analyse the optical signal from a Low Coherence Interferometric (LCI) system. The system uses a Mach-Zehnder (MZ) interferometer to interrogate a Fabry-Perot cavity, working as an optical sensor. This algorithm is based on the correlation and convolution operations, which allows the signal to be reconstructed based on itself, as well as, on the linearization of the signal phase, allowing the non-linearities of the actuator incorporated on the MZ interferometer to be compensated. The results show a noise reduction of 30 dB in the signal acquired. As a result, a reduction of 8.2 dB in the uncertainty of the measurement of the physical measurand is achieved. It is also demonstrated that the phase linearization made it possible to obtain a coefficient of determination (namely, R-squared) higher than 0.999. 11:30am - 11:45am
ID: 278 / TOM10 S6: 3 TOM 10 Applications of Optics and Photonics Wavefront folding interferometer for single-shot lensless imaging 1University of Eastern FInland, Finland; 2Dispelix Oy, Finland We have developed a fast, high-resolution, and single-shot lensless imaging technique based on the wavefront folding interferometer (WFI). Considering a stationary, quasimonochromatic, and quasihomogeneous source of light we studied the effect of spatial coherence on the retrieved image quality. Moreover, a thorough investigation of the resolution and the semi-infinity depth of focus of the imaging system was performed and demonstrated experimentally. 11:45am - 12:00pm
ID: 298 / TOM10 S6: 4 TOM 10 Applications of Optics and Photonics Terahertz waveform synthesis in scattering systems via nonlinear ghost imaging 1Emergent Photonics Research Centre and Dept. of Physics, Loughborough University, Loughborough, UK; 2Emergent Photonics (EPic) Laboratory, Dept. of Physics and Astronomy, University of Sussex, Brighton, UK; 3Department. of Physics and Astronomy, University of Exeter, Exeter, UK Terahertz Nonlinear Ghost Imaging introduces a groundbreaking method for object sampling at spatial-temporal levels, achieving super-resolution (i.e., beyond the diffraction limit). Our theoretical and experimental endeavour seeks to leverage this technique, enabling arbitrary field-level waveform manipulation through intricate propagation in scattering environments. This approach facilitates essential agile waveform adjustment, made possible through near-field interactions between terahertz sources and scattering media. 12:00pm - 12:15pm
ID: 259 / TOM10 S6: 5 TOM 10 Applications of Optics and Photonics Applied Optics in the Development of Smart Road Markings 1University of Minho, Portugal; 2Federal University of Pernambuco; 3University of S. Paulo Road markings (RM) consist of two distinct layers: the paint layer and the retroreflective layer. Together, they function as system and are essential features for road safety. Recent studies have been centred on elevating these systems to a smarter level, imbuing them with novel functionalities, increasing their visibility, service life and road safety. These new capabilities encompass photoluminescence, anti-aging, self-cleaning, and thermochromism. The aim of this study is to review the advancements and highlight potential opportunities for RM, the materials employed, functionalization techniques, and the key outcomes achieved. | ||