The first, to the best of our knowledge, mid-infrared Q-switched Ce-doped glass laser is demonstrated. As saturable absorbers, Fe:CdSe and Fe:CdTe are used for the first time. When Q-switched by Fe:CdSe, the laser operates in a multi-pulse regime with an individual pulse width of 110 ns, centered at λ = 5.20 µm. With Fe:CdTe as saturable absorber, 1-3 giant pulses of 30 ns pulse width are generated at λ = 5.13 µm.
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http://dx.doi.org/10.1364/OL.447906 | DOI Listing |
Micromachines (Basel)
January 2025
Nanoscale Glasstec GmbH (NaGt), 34132 Kassel, Germany.
This paper reviews and compares electrostatically actuated MEMS (micro-electro-mechanical system) arrays for light modulation and light steering in which transmission through the substrate is required. A comprehensive comparison of the technical achievements of micromirror arrays and microshutter arrays is provided. The main focus of this paper is MEMS micromirror arrays for smart glass in building windows and façades.
View Article and Find Full Text PDFMicromachines (Basel)
January 2025
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China.
In microfluidic chips, glass free-form microchannels have obvious advantages in thermochemical stability and biocompatibility compared to polymer-based channels, but they face challenges in processing morphology and quality. Hence, picosecond laser etching with galvanometer scanning is proposed to machine spiral microfluidic channels on a glass substrate. The objective is to disperse and sort microparticles from a glass microchip that is difficult to cut.
View Article and Find Full Text PDFMicromachines (Basel)
December 2024
Lightweight Optics and Advanced Materials Technology Center, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China.
Direct energy deposition is an additive technology that can quickly manufacture irregularly shaped quartz-glass devices. Based on this technology and coaxial laser/wire feeding, open-loop tests were conducted under different process parameters. A closed-loop temperature control system was designed and built for the molten pool temperature in quartz-glass additive manufacturing.
View Article and Find Full Text PDFInt J Ophthalmol
January 2025
Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.
Aim: To evaluate the effect of femtosecond laser small incision lenticule extraction (SMILE) on the binocular visual function in myopic patients with glasses-free three-dimensional (3D) technique.
Methods: Totally 50 myopic patients (39 females and 11 males) with SMILE were enrolled in this prospective study. The glasses-free 3D technique was used to evaluate the binocular visual function in these subjects including static stereopsis, dynamic stereopsis, foveal suppression, and binocular balance point of signal to noise ratio (s/n ratio).
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