Trepo - Selaus asiasanan mukaan "114"

    • Advanced Laser-Assisted Technique for Bonding Miniature Multichannel Laser Diode to Silicon Photonics Circuit 

      Vlasov, Aleksandr; Salmi, Joel; Tuorila, Heidi; Lehtinen, Santeri; Viheriälä, Jukka; Guina, Mircea (2025)
      conference
      The rapid evolution of information technology - driven by artificial intelligence, cloud computing, search engines, e-commerce, and Big Data - has spurred increasing demand for new application areas. Photonics remains ...
    • Advanced multimodal laser imaging tool for urothelial carcinoma diagnosis (AMPLITUDE) 

      Kurilchik, Sergey; Gacci, Mauro; Cicchi, Riccardo; Pavone, Francesco S; Morselli, Simone; Serni, Sergio; Chou, MH; Närhi, Mikko; Rafailov, Edik; Stewart, Neil; Lennon, Cordelia; Gumenyuk, Regina (01.03.2020)
      article
    • Advancements in fabricating polymer-based microring resonators by nanoimprint lithography 

      Pandian, Santhosh; Karvinen, Petri; Rekola, Heikki; Bej, Subhajit; Müllner, Paul; Eggeling, Moritz; Hainberger, Rainer; Niemi, Tapio (15.07.2025)
      article
      Polymeric materials for photonic integrated circuits have attracted much interest over the past decades due to their unique properties, including a simple and low-cost fabrication process, low absorption, a broad wavelength ...
    • Advancing frequency locking: Modified FPGA-Guided direct modulation spectroscopy for laser stabilization 

      Majumder, Prosenjit; Yadav, Hemant; Tirupathi, Rakesh; Kamalkant,; Jain, Shruti; Yadav, Poonam; Ghosh, Arnab; Deo, Apoorav Singh; Singh, Deepshikha (24.10.2023)
      article
      In this paper, we propose a cost-effective laser frequency locking scheme based on frequency modulation spectroscopy (FMS) for precision measurements and experiments in various fields. We demonstrate that by digitally ...
    • Advancing Microscopy Techniques for Accurate Alignment in Photonic Integration 

      Vlasov, Aleksandr; Shevkunov, Igor; Egiazarian, Karen; Gurovich, Andrei; Rozhkov, Denis; Närhi, Mikko; Viheriälä, Jukka; Guina, Mircea (2025)
      conference
      The constantly shifting landscape of information technology - spurred by advancements in artificial intelligence, cloud computing, search engines, e-commerce, and Big Data - has intensified the demand for new application ...
    • Aerosol gas exchange system (AGES) for nanoparticle sampling at elevated temperatures: Modeling and experimental characterization 

      Bainschab, Markus; Martikainen, Sampsa; Keskinen, Jorma; Bergmann, Alexander; Karjalainen, Panu (20.11.2019)
      article
      <p>An aerosol gas exchange system (AGES) for nanoparticle sampling at elevated temperatures was developed, modeled, and further characterized with laboratory tests with respect to gas exchange efficiency and particle ...
    • Airport emission particles: Exposure characterization and toxicity following intratracheal instillation in mice 

      Bendtsen, Katja Maria; Brostrøm, Anders; Koivisto, Antti Joonas; Koponen, Ismo; Berthing, Trine; Bertram, Nicolas; Kling, Kirsten Inga; Dal Maso, Miikka; Kangasniemi, Oskari; Poikkimäki, Mikko; Loeschner, Katrin; Clausen, Per Axel; Wolff, Henrik; Jensen, Keld Alstrup; Saber, Anne Thoustrup; Vogel, Ulla (11.06.2019)
      article
      <p>Background: Little is known about the exposure levels and adverse health effects of occupational exposure to airplane emissions. Diesel exhaust particles are classified as carcinogenic to humans and jet engines ...
    • Airy gas model: From three to reduced dimensions 

      Bencheikh, K.; Putaja, A.; Räsänen, E. (05 / 2021)
      article
      <p>By using the propagatorof linear potential as a main tool,we extend theAiry gas (AG) model, originally developed for the three-dimensional (d = 3) edge electron gas, to systems in reduced dimensions (d = 2, 1). ...
    • An aldehyde as a rapid source of secondary aerosol precursors: theoretical and experimental study of hexanal autoxidation 

      Barua, Shawon; Iyer, Siddharth; Kumar, Avinash; Seal, Prasenjit; Rissanen, Matti (25.09.2023)
      article
      Aldehydes are common constituents of natural and polluted atmospheres, and their gas-phase oxidation has recently been reported to yield highly oxygenated organic molecules (HOMs) that are key players in the formation of ...
    • Alkali Monitoring of Industrial Process Gas by Surface Ionization─Calibration, Assessment, and Comparison to in Situ Laser Diagnostics 

      Gall, Dan; Viljanen, Jan; Gogolev, Ivan; Allgurén, Thomas; Andersson, Klas (2021)
      article
      <p>In this work, we present rigorous calibration and assessment of a surface ionization detector (SID) for alkali monitoring in industrial process gases and compare it to an in situ laser diagnostic method called ...
    • All-fiber mode-locked laser at 0.98 µm 

      Aleshkina, Svetlana S.; Lipatov, Denis S.; Velmiskin, Vladimir V.; Kochergina, Tatyana A.; Fedotov, Andrei; Gumenyuk, Regina; Kotov, Leonid V.; Temyanko, Valery L.; Bubnov, Mikhail M.; Guryanov, Aleksey N.; Likhachev, Mikhail E.
      Proceedings of SPIE (2020)
      conference
    • All-fiber mode-locked laser at 977 nm 

      Aleshkina, Svetlana S.; Lipatov, Denis S.; Velmiskin, Vladimir V.; Kochergina, Tatyana A.; Fedotov, Andrey; Gumenyuk, Regina; Kotov, Leonid V.; Temyanko, Valery L.; Bubnov, Mikhail M.; Guryanov, Alexey N.; Likhachev, Mikhail E.
      Proceedings of SPIE - The International Society for Optical Engineering (2020)
      conference
      <p>In this paper, we have developed Yb-doped fiber suitable for creation of all-fiber seed laser schemes operating near 977 nm. The fiber was based on a ring-doping design (cladding was partially doped with Yb-ions), ...
    • All-fiber narrow line 1.6 mJ/9 ns high-power MOPA system with spun Yb-doped tapered fiber 

      Aghayari, Ebrahim; Fathi, Hossein; Samanta, Uttam; Motorin, Evgenii; Chumachenko, Andrey; Grishchenko, Andrey; Gumenyuk, Regina; Liu, Yiran; Wang, Tianhua; Filippov, Valery
      Proceedings of SPIE - The International Society for Optical Engineering (20.11.2025)
      conference
      High-energy, narrow-linewidth pulsed fiber lasers are fundamentally limited by nonlinear effects, particularly stimulated Brillouin scattering, which constrains power scaling. Here, we demonstrate a master-oscillator ...
    • All-fiber polarization-maintaining mode-locked laser operated at 980  nm 

      Aleshkina, Svetlana S.; Fedotov, Andrei; Korobko, Dmitrii; Stoliarov, Dmitrii; Lipatov, Denis S.; Velmiskin, Vladimir V.; Temyanko, Valery L.; Kotov, Leonid V.; Gumenyuk, Regina; Likhachev, Mikhail E. (01.04.2020)
      article
      For the first time, to the best of our knowledge, we present an all-fiber polarization-maintaining passively mode-locked picosecond laser operated at 980 nm. The laser cavity had a ring configuration with a semiconductor ...
    • All-optical guided-wave random laser in nematic liquid crystals 

      Perumbilavil, Sreekanth; Piccardi, Armando; Buchnev, Oleksandr; Kauranen, Martti; Strangi, Giuseppe; Assanto, Gaetano (2017)
      article
      <p>Spatial solitons can affect and enhance random lasing in optically-pumped dye-doped nematic liquid crystals. Upon launching two collinear beams in the sample, the first to pump the fluorescent guest molecules and ...
    • All-optical switching based on plasmon-induced Enhancement of Index of Refraction 

      Dhama, Rakesh; Panahpour, Ali; Pihlava, Tuomas; Ghindani, Dipa; Caglayan, Humeyra (06 / 2022)
      article
      In quantum optical Enhancement of Index of Refraction (EIR), coherence and quantum interference render the atomic systems to exhibit orders of magnitude higher susceptibilities with vanishing or even negative absorption ...
    • Alpha Radiation Detection via Radioluminescence of Air 

      Sand, Johan
      Tampere University of Technology. Publication (21.12.2016)
      doc
      Alpha radiation presents a challenge for operators in the field of nuclear safety and security. Due to the short range (few centimeters in air) and high stopping power, alpha particles are conventionally detected with ...
    • Alpha radiation induced luminescence in solar blind spectral region 

      Kerst, Thomas; Toivonen, Juha (2018)
      conference
      <p>Intense luminescence in the solar blind spectral region is produced by modifying the gas atmosphere around an alpha emitter. This enables standoffdetection of alpha radiation under daylight conditions.</p>
    • altx: a python package for adaptive law-based transformation in time series classification 

      Halmos, Balázs P.; Hajós, Balázs; Á Molnár, Vince; Kurbucz, Marcell T.; Jakovác, Antal (02 / 2026)
      article
      We introduce altx, an open-source python package for computationally lightweight and transparent time series classification pipelines. The altx package implements the adaptive law-based transformation, a multiscale feature ...
    • Aluminium oxide formation via atomic layer deposition using a polymer brush mediated selective infiltration approach 

      Snelgrove, M.; McFeely, C.; Mani-Gonzalez, P.G.; Lahtonen, K.; Lundy, R.; Hughes, G.; Valden, M.; McGlynn, E.; Yadav, P.; Saari, J.; Morris, M.A.; O'Connor, R. (2020)
      article
      Area selective deposition (ASD) is an emerging method for the patterning of electronic devices as it can significantly reduce processing steps in the industry. A potential ASD methodology uses infiltration of metal precursors ...