Hernández Martínez, Osmery
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Hernández Martínez
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Osmery
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Ingeniería Eléctrica, Electrónica y de Comunicación
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Publication Open Access On the lossy character of Y-branches and their analogy to Wilkinson power dividers(Optica Publishing Group, 2024-11-04) Oña Valladares, Douglas; Hernández Martínez, Osmery; Ortega Gómez, Ángel; González-Andrade, David; Liberal Olleta, Íñigo; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Institute of Smart Cities - ISCY-branches are commonly used devices for power splitting and combining in various technological applications. Despite their widespread use, research on their design and analysis has been mostly focused on their characterization based on reflection and transmission when operating as power dividers, leaving aside an exhaustive consideration of all their possible modes of operation. Also, it has not been fully recognized that these devices have intrinsic losses. If these losses are not properly managed, they can negatively impact the network, but also open the door to new opportunities. In this context, this paper examines Y-bifurcation properties and their connection to Wilkinson's power dividers. Additionally, through numerical analysis, we demonstrate the possibility of integrating these devices into more complex optical networks. We use them as components in generalized power dividers and analog optical computational systems designed to filter out the maximum common phase component and avoid backward reflections for any input signal.Publication Open Access Orthogonal thermal noise and transmission signals: a new coherent perfect absorption's feature(American Physical Society, 2024-09-06) Oña Valladares, Douglas; Ortega Gómez, Ángel; Hernández Martínez, Osmery; Liberal Olleta, Íñigo; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Institute of Smart Cities - ISCCoherent perfect absorption (CPA) is an interference process associated with the zeros of the scattering matrix of interest for optical computing, data processing, and sensing. However, the noise properties of CPA remain relatively unexplored. Here, we demonstrate that CPA thermal noise signals exhibit a unique property: they are orthogonal to the signals transmitted through the network. In turn, such property enables a variety of thermal noise management effects, such as the physical separability of thermal noise and transmitted signals, and "externally lossless"networks that internally host radiative heat transfer processes. We believe that our results provide a new perspective on the many CPA technologies currently under development.