Searched for: subject%3A%22Lasers%22
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Beumer, Mees (author)
The mini optical ground station (MISO), on top of the Aerospace Engineering faculty, serves the purpose of demonstrating Free Space Optical Communication technology. A downlink from low earth orbit imposes pointing requirements beyond what can be achieved by the telescope mount. A Fine Pointing Assembly (FPA), the topic of this thesis, aims to...
master thesis 2024
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Smit, Jelle (author)
Organ-on-chip (OoC) technology has transformed biomedical research by providing a platform to simulate physiological conditions for drug development and disease modeling. Incubator-free OoC systems offer notable advantages over traditional approaches, including enhanced adaptability and impermeability to gases. Nevertheless, achieving precise...
master thesis 2024
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Wansink, Nick (author)
Micromechanical resonators, which have become feasible due to advanced manufacturing techniques, have shown several interesting phenomena including mode coupling in a range of applications that span metrology and sensing. Conventional fabrication methods of these resonators have been used throughout the field. However, fabrication of...
master thesis 2024
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Thiam, Arthur (author)
Progress in Laser powder bed fusion manufacturing has led to greater use of Additive Manufacturing in combustion chambers/nozzles. This allows for the creation of more intricate and efficient solutions, but generates the need for a better understanding of how surface roughness in micro-channels used for engine cooling relates to build angle and...
master thesis 2024
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Duplay, Emmanuel (author)
A laser-sustained plasma (LSP) generator capable of operating as a laser-thermal thruster was designed and tested. The apparatus was powered by a 3-kW 1070-nm fiber-optic laser and was operated with argon gas. The laser absorption, radiated spectrum, and change in static pressure were recorded, and high-speed video footage of the LSP was...
master thesis 2024
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Wang, S. (author), Zong, Qihang (author), Yang, Huiru (author), Huang, Qianming (author), Ye, Huaiyu (author), French, P.J. (author)
In recent years, flexible strain sensors based on metal cracks have garnered significant interest for their exceptional sensitivity. However, striking a balance between sensitivity and detection range remains a significant challenge, which often limits its wider application. Herein, we introduce an innovative laser transmission pyrolysis...
conference paper 2024
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Kaaks, B.J. (author), Couweleers, S.D. (author), Lathouwers, D. (author), Kloosterman, J.L. (author), Rohde, M. (author)
This work presents two color LIF temperature measurements for the transient freezing in a square channel under laminar flow conditions. This is the first time non-intrusive temperature measurements were performed within the thermal boundary layer during the transient growth of an ice layer in internal flow. A combination of a local outlier...
journal article 2024
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Lussenburg, K.M. (author), van Starkenburg, R.I.B. (author), Sakes, A. (author), Breedveld, P. (author)
Metal additive manufacturing is a promising technology for the production of functional medical products, due to its high shape complexity and resolution, and ability to withstand sterilization temperatures. This study explores the possibility of designing a completely non-assembly steerable surgical instrument using Selective Laser Melting....
journal article 2024
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Belaid, Walid (author), Gezgin, Serap Yiğit (author), Basyooni, Mohamed A. (author), Eker, Yasin Ramazan (author), Kılıç, Hamdi Şükür (author)
UV sensors hold significant promise for various applications in both military and civilian domains. However, achieving exceptional detectivity, responsivity, and rapid rise/decay times remains a notable challenge. In this study, we address this challenge by investigating the photodetection properties of CdS thin films and the influence of...
journal article 2024
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Dashtabi, Mahdi Mozdoor (author), Khoshmehr, Mohammad Talebi (author), Nikbakht, Hamed (author), Lopez Rodriguez, B. (author), Sharma, N. (author), Esmaeil Zadeh, I.Z. (author), Akca, B. Imran (author)
Photonic integrated circuits (PICs) are enabling breakthroughs in several areas, including quantum computing, neuromorphic processors, wearable devices, and more. Nevertheless, existing PIC measurement methods lack the spectral precision, speed, and sensitivity required for refining current applications and exploring new frontiers such as...
journal article 2024
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Zeng, Y. (author), Nunez, Alfredo (author), Li, Z. (author)
A transfer function (TF) is an effective representation of the load-response relationship of railway track structures. To fill the gap in measuring track structure TFs over a wide frequency range from a moving vehicle, we develop a TF measurement system and the associated TF estimation methodology. Accelerometers are utilized to estimate the...
journal article 2024
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Kuruganti, V.V. (author), Isabella, O. (author), Mihailetchi, Valentin D. (author)
Interdigitated back contact (IBC) architecture can yield among the highest silicon wafer-based solar cell conversion efficiencies. Since both polarities are realized on the rear side, there is a definite need for a patterning step. Some of the common patterning techniques involve photolithography, inkjet patterning, and laser ablation. This...
journal article 2024
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Mazza, F. (author), Castellanos, Leonardo (author), Klyukin, Dmitry (author), Bohlin, G.A. (author)
Coherent anti-Stokes Raman scattering (CARS) spectroscopy has been used to provide gas-phase quantitative scalar information (e.g. temperature, density, and species concentrations) for more than 5 decades. This technique is renowned for its ability to realize non-intrusive in-situ measurements in harsh environments with excellent spatial and...
book chapter 2024
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Gutierrez, Ivan (author), Lindenbergh, R.C. (author), Watson, Lisa (author), Shelton, Kim (author)
Detailed 3D information on vulnerable archaeological sites can document cultural heritage and contribute to its preservation. The Late Bronze Age Mycenaean cemetery of Aidonia, Greece, is a representative case of a vulnerable site. Tomb looting has occurred sporadically since the 1970s, when the Greek government was made aware of the site....
journal article 2024
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Sattari, Mohammad (author), Ebrahimi, Amin (author), Luckabauer, Martin (author), Römer, Gert willem R.B.E. (author)
Modeling the thermal and fluid flow fields in laser-based directed energy deposition (DED-LB) is crucial for understanding process behavior and ensuring part quality. However, existing models often fail to accurately predict these fields due to simplifying assumptions, particularly regarding powder particle-induced attenuation in laser power...
journal article 2024
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Salehi-Dorcheabedi, Milad (author), Asgari, Jamal (author), Amiri Simkooei, A. (author), Fatemi Nasrabadi, Sayyed Bagher (author)
Although Light Detection and Ranging (LiDAR) technology is currently one of the most efficient methods for acquiring high-density point cloud, there are still challenges in terms of data reliability. In particular, the accuracy assessment of LiDAR data, especially in the height component, is one of the main issues in this context. This study...
journal article 2024
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Chatzopoulou, Chrysoula (author)
Shape Memory Alloys (SMAs) are a class of metallic multi-functional materials which possess sensing and actuation capabilities, thanks to their unique ability to couple thermal and mechanical fields. NiTi-based Shape Memory Alloys exhibit properties which guarantee their high performance in adverse environments and, with the added benefit of two...
master thesis 2023
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Ciggaar, Rooderick (author)
The future will see an increase in missions headed for deep space. Advanced payloads will require higher data rates in more efficient spacecraft. Conventional space communication is facilitated through RF technology. Although it is very reliable, doubts arise on its future sustainability because of limited bandwidth, inefficiency and a saturated...
master thesis 2023
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Zeng, Y. (author)
doctoral thesis 2023
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Palings, Tijs (author)
As space technology continues to advance, the landscape of telecommunication is witnessing a transition from traditional radio frequency to laser communication technology, driven by its enhanced efficiency. Notably, laser communication offers the potential for achieving millimeter-level ranging accuracy, thanks to its significantly higher data...
master thesis 2023
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