3/25/2023 0 Comments Fotonica 2016In each technique, we present their applicable environments and conditions according to the following indicators: operating distance (from 2 attenuation lengths (AL) to 13.5 AL), resolution (from centimeter to millimeter), and field of view (FOV). Moreover, we also present a detailed comparison of these techniques. We present the individual working mechanisms, latest representative advances, and suitable application conditions. In this work, we review the six most common methods based on signal light enhancement. The recent developments in image enhancement algorithms and strategies of signal light enhancement have brought improvement in some application areas. Recently, the research community has focused on mitigating these effects. The challenges associated with acquiring the clear images of objects in underwater environment are difficult to overcome due to the absorptive and scattering nature of seawater. Two more features, important for optimal imaging operation of the system, are the ability of the laser to operate in low temporal jitter when triggered by the video-camera signals in order to cope with the correct range-gating temporization and a refined optical beaming that allows a versatile control of the scene illumination over a wider range of distances and angular span. Other issues have been addressed and successfully managed with this new laser implementation: very compact packaging, low power consumption, and efficient cooling under a wide range of operating environmental conditions. The energy, pulse duration, and repetition rate goals sought for this item have been achieved: >2mJ <2ns, up to 1kHz. The new laser presents a novel MOPA (master oscillator-power amplifiers) architecture, chosen in order to render the output energy scalable in the present and future upgrades. The laser is based on a completely new conceptual design necessary to meet the tougher laser specifications as emerged after the successful results obtained with a preliminary off-the-shelf source (SystemZero implementation) and the prospected requirements for enhancing UTOFIA imaging system competitiveness. A novel, frequency doubled laser system emitting to be used as scene illuminator is the main result of this presentation. UTOFIA offers a new modus operandi for the main targeted domains of application: marine life monitoring, harbor and ocean litter detection, fisheries stock assessment, aquaculture monitoring, and seabed mapping. This will fill the current gap between short-range, high-resolution conventional video and long-range low-resolution sonar systems. Using range-gated imaging, the system will extend the imaging range by factor 2 to 3 over conventional imaging systems, while at the same time providing video-rate 3D information. Technology > Electrical engineering.The goal of UTOFIA (EU H2020 project) is to offer a compact and cost-effective underwater imaging system for turbid environments. Light, Electrical and Electronic Engineering The copy of record is available at the IET Digital LibraryĮnergy transfer, luminescence, rare-earths, SnO-SiO, transparent glass-ceramics, dip coating, x-ray diffraction, erbium, glass ceramics, optical fabrication, optical films, optical glass, photoluminescence, Electrical Engineering. This paper is a postprint of a paper submitted to and accepted for publication in 18th Italian National Conference on Photonic Technologies (Fotonica 2016) and is subject to Institution of Engineering and Technology Copyright. ORCID iDs Tran, Lam Thi Ngoc, Meneghetti, Marcello, Zur, Lidia, Tran, Van Thi Thanh, Lukowiak, Anna, Zonta, Daniele ORCID:, Righini, Giancarlo C. The energy transfer dynamic was investigated by time-resolved spectroscopy and photoluminescence measurements. The transparency of the thin film was tested by UV-Vis transmittance measurements. The FTIR spectra and X-ray diffraction patterns were used to characterize the structure of the thin films. Thin films with a variety of composition were synthesized and their structural, optical and spectroscopic properties were investigated. Our goal is to find a viable fabrication protocol to obtain them. The present work focuses on sol-gel derived SnO2-based thin glass-ceramic films doped with Er3+ ions, fabricated by dipcoating technique. Filename: Tran_etal_Fotonica_2016_SnO2_based_glasses_a_viable_photonic_system.pdf
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