Results 21 to 30 of about 144 (133)

Self-mode-locking semiconductor disk laser

Optics Express, 2014
The development of mode-locked semiconductor disk lasers received striking attention in the last 14 years and there is still a vast potential of such pulsed lasers to be explored and exploited. While for more than one decade pulsed operation was strongly linked to the employment of a saturable absorber, self-mode-locking emerged recently as an ...
Gaafar, Mahmoud, Richter, Philipp, Keskin, Hakan, Moeller, Christoph, Wichmann, Matthias, Stolz, Wolfgang, Rahimi-Iman, Arash, Kochi, Martin   +7 more
openaire   +3 more sources

High Power (>27 W) Semiconductor Disk Laser Based on Pre-Metalized Diamond Heat-Spreader

IEEE Photonics Journal, 2019
High power semiconductor disk lasers (SDLs) were demonstrated based on the thermal management using pre-metalized diamond heat-spreader. The processing of pre-metallization using Cu-Sn alloy was developed. The resultant and influence of pre-metallization
Guan-Yu Hou, Shi-Li Shu, Jian Feng, Andreas Popp, Berthold Schmidt, Huan-Yu Lu, Li-Jie Wang, Si-Cong Tian, Cun-Zhu Tong, Li-Jun Wang   +9 more
doaj   +1 more source

Ultrafast dynamics of semiconductor disk lasers [PDF]

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017
ISBN:978-1-5090-6736 ...
Alfieri, Cesare G.E., Waldburger, Dominik, Link, Sandro M., Golling, Matthias, Keller, Ursula; id_orcid0000-0002-1689-8041   +4 more
openaire   +2 more sources

Cutting-Edge High-Power Ultrafast Thin Disk Oscillators

Applied Sciences, 2013
A growing number of applications in science and industry are currently pushing the development of ultrafast laser technologies that enable high average powers.
Thomas Südmeyer, Matthias Golling, Christian Kränkel, Kolja Beil, Martin Hoffmann, Cyrill R. E. Baer, Oliver H. Heckl, Cinia Schriber, Florian Emaury, Clara J. Saraceno, Ursula Keller   +10 more
doaj   +1 more source

Widely Tunable High-Power Semiconductor Disk Laser With Nonresonant AR-Assisted Gain Element on Diamond Heat Spreader

IEEE Photonics Journal, 2011
We report on an optically pumped semiconductor disk laser with a wide wavelength tuning range and a high peak output power. This was achieved using a combination of efficient thermal management and a broadband gain element (GE) with carefully engineered ...
C. Borgentun, C. Hessenius, J. Bengtsson, M. Fallahi, A. Larsson   +4 more
doaj   +1 more source

Self-Sustained Laser Pulsation in Active Optomechanical Devices

IEEE Photonics Journal, 2018
We developed a model for an active optomechanical cavity embedding a semiconductor optical gain medium in the presence of dispersive and dissipative optomechanical couplings. Radiation pressure drives the mechanical oscillation and the back-action occurs
Debora Princepe, Gustavo S. Wiederhecker, Ivan Favero, Newton C. Frateschi   +3 more
doaj   +1 more source

Support‐Controlled Reaction Pathways via Dynamic Sulfur‐Mediated Interfaces for Selective Urea Electrolysis

Advanced Functional Materials, EarlyView.
Sulfur‐doped graphitized carbon nanofibers act as adaptive catalyst–support platforms, enabling dynamic sulfur‐mediated reconstruction and strong metal–support interactions. This unique behavior enhances catalyst stability and controls reaction pathways, achieving highly selective urea oxidation (∼92% N2) coupled with efficient hydrogen evolution ...
Melanie Guillén‐Soler, Lucía Vizcaíno‐Anaya, Ahmad Tayyebi, José Manuel Vila‐Fungueiriño, María del Carmen Giménez‐López   +4 more
wiley   +1 more source

Nanoscale Spatial Tuning of Superconductivity in Cuprate Thin Films via Direct Laser Writing

Advanced Functional Materials, EarlyView.
Maskless direct laser writing enables local control of oxygen stoichiometry in epitaxial YBCO thin films under ambient conditions. Sub‐micrometer grayscale patterns with tunable optical response and superconducting transport properties are achieved.
Irene Biancardi, Valerio Levati, Jordi Alcalà, Thomas Günkel, Nicolas Lejeune, Riccardo Girelli, Alejandro V. Silhanek, Valeria Russo, Narcís Mestres, Daniela Petti, Anna Palau, Edoardo Albisetti   +11 more
wiley   +1 more source

Development of Multifunctional Hierarchically Restructured Antibacterial Neural Interfacing Electrodes via Plasma‐Enhanced Atomic Layer Deposition of Zinc Oxide Thin Films

Advanced Functional Materials, EarlyView.
ABSTRACT Next‐generation implantable neural‐interfacing devices are increasingly constrained by the coupled demands of electrode miniaturization, electrochemical performance, and implantation infection risk. Femtosecond laser–based hierarchical surface restructuring (HSR) technology has emerged as a scalable, manufacturing‐compatible platform for ...
Henna Khosla, Wesley Seche, Kriti Panchal, Steven J. May, Ekaterina Pomerantseva, Jacob Elmer, Tyler Cooper, Matthew J. Urban, Hailey Y. Maurer, Gregory A. Caputo, Jeffrey Hettinger, Shahram Amini, Gang Feng   +12 more
wiley   +1 more source

Photovoltaic Stimulation of Mouse and Pig Retina With Pyrolytic Carbon Microelectrodes Integrated on High‐Density Silicon Solar Cell Arrays

Advanced Healthcare Materials, EarlyView.
In this study, we fabricate photovoltaic retinal implants with pyrolytic carbon electrodes and test their ability to stimulate mouse and pig retinas when illuminated with near‐infrared light. We find increased spiking activity in both animal models compared to spontaneous activity and TTX controls and analyze the spike amplitude, latency and frequency.
Akihiro Matsumoto, Pratik Kusumanchi, Jesper Guldsmed Madsen, Asbjørn Cortnum Jørgensen, Gisele Alves dos Reis Benatto, Sune Thorsteinsson, Peter Behrensdorff Poulsen, Keisuke Yonehara, Toke Bek, Stephan Sylvest Keller, Rasmus Schmidt Davidsen   +10 more
wiley   +1 more source