Heavily Er3+-doped TeO2–BaF2–La2O3–LaF3 (TBLL) glasses with low hydroxyl absorption (αOH−≈0.025cm−1 ) and high glass transition temperatures (Tg437℃) were prepared. The Raman spectra and differential scanning calorimetry (DSC) curves were measured to characterize the structural...

Beneficial from the development of femtosecond laser direct writing technique, the fabrication of Bragg gratings inside a fiber with low photosensitivity like active fiber becomes possible. In this paper, we fabricate erbium-doped fiber Bragg gratings (EDFBGs) using femtosecond laser...

Zinc-potassium germanate glasses with nominal composition 50 % GeO2+25 % ZnO+25 % K2CO3 (GZK) and obtained through melt-quenching technique, exhibits superior properties to silicate glasses, widely used as laser light absorbers. These GZK glasses are obtained at lower melting temperatures,...

Based on the pulse shaping technique, filamentation of double femtosecond pulses in fused silica is studied experimentally and theoretically. It is shown in experiments that the filamentation onset and length, as well as the intensity can be continuously changed with the delay time. Theoretical...

Acoustic emission (AE) technology has great potential in the field of online monitoring of laser shock peening (LSP), but its high sampling frequency leads to a large amount of real-time calculation, which poses a great challenge to the industrial application of monitoring technology. To solve...

Wire-feed laser additive manufacturing is an emerging fabrication technique capable of highly automated large-scale volume production that can reduce both material waste and overall cost while improving product lead times. Quality assurance is necessary for implementation into critical...

Laser Powder Bed Fusion (L-PBF) enabled Additive Manufacture (AM) of high field side lower hybrid current drive launcher components from Glenn Research Copper 84 (GRCop-84), a Cr2Nb (8 at. % Cr, 4 at. % Nb) precipitation hardened alloy with a yield strength of 500 MPa and ultimate tensile...

Using powders of different particle sizes, 9Cr steel samples are additively prepared by laser coaxial powder feeding technology. 9Cr steel is a material that has been widely used in pressure vessel parts in thermal power plants and nuclear power plants, and has good high-temperature creep...

Carbon thin film deposition was carried out with nanosecond or femtosecond laser ablation from two different sp2-bonded carbon targets, in particular highly oriented pyrolytic graphite (HOPG) and glassy carbon (GC). Raman measurements indicated that theses as-deposited films are amorphous carbon...

Internal and surface imperfections are known to reduce the fatigue strength of parts fabricated by laser powder bed fusion (LPBF). Post-treatment can play a key role to ameliorate the adverse effects of these defects. In this study, severe vibratory peening, as a novel surface treatment based on...

As a free forming additive manufacturing technology for high performance metal parts, laser deposition manufacturing has a broad application prospect in aerospace and other fields. The solidification behavior and microstructure of molten pool determine the mechanical properties of the deposited...

This work reports an innovative method to obtain anatase TiO 2 films on polymeric substrate. The low temperature atomic layer deposition (LT-ALD) of TiO 2 on polymeric substrate was combined with the laser irradiation. TiO 2 amorphous films were deposited by LT-ALD on polyethylene naphthalene...

The effectiveness of the electrochemical WO 3 -modification as a method for improving the photoactivity of native air-formed TiO 2 layers and the way in which a mild laser treatment influences the photoelectrochemical performances of the thus obtained WO 3 /TiO 2 systems were investigated. At...

Selective laser melting (SLM) or laser powder-bed fusion (L-PBF) is a powder-based additive manufacturing process that enables to produce steel parts with complex designs and a minimum amount of material. In this work, a high performance 300 maraging steel were processed by SLM, where the layer...

Absorbance is often used for simulations or validation of process parameters for powder-based laser materials processing. In this work, the absorbance of 39 different metal powders for additive manufacturing is determined at 20 different laser wavelengths. Different grain sizes and aging states...

Gel electrolyte composite with high areal capacity cathode effectively improves battery energy density and safety. Still, the insufficient interface contact between electrolyte and electrode limits the capacity release inside the thick cathode. Here, we rationally design a self-supporting...

This paper demonstrates a selective laser melting method to produce a metal matrix composite capable of enhancing the thermal conductivity of 316L stainless steel using a jettable Cu ink. A novel canister for controlling the atmosphere surrounding a powder bed during selective laser melting, was...

In this research, a room temperature multicycle nanoindentation technique was implemented to evaluate the effects of the laser peening (LP) process on the surface mechanical behavior of additively manufactured (AM) Inconel 625. Repetitive deformation was introduced by loading-unloading during an...

The project addressed the widening of the robustness of laser hybrid arc welding, LAHW, with fibre or disc lasers, for steel structures. The study particularly focused on applicability for two large scale demonstrators, namely an excavator part and a truck component. This involved challenging...

The purpose of this article is to consider potential legal implications of deployment of nano-enhanced technology in armed conflict. Nano-lasers will undoubtedly enhance the performance of many weapons systems, including autonomous systems, with better energy storage, more rapid computations,...

We explore the regional co-evolution of firm population size, private-sector patenting and public research in the empirical context of German laser research and manufacturing over more than 40 years from the emergence of the industry to the mid-2000s. Our qualitative as well as quantitative...

Part 1 Big Tree with Thick Trunk and its Fruits -- 1 Research Aim and Framework -- 2 Theoretical Background: General Purpose Technology, Pattern of Innovation, and Spin-out -- 3 Data -- 4 Technological Characteristics of Laser and Laser Diode -- Part 2 R&D and Market Competition of Laser Diodes...

A fóliaalagutas dinnyetermesztésben alkalmazható technológiák a terméshozamban mérhető eltéréseket eredményeznek. Feltételeztük, hogy a hagyományostól eltérő fóliaperforálással nagyobb terméshozamot, valamint nagyobb nyereséget lehet elérni. Ehhez a...

Introductory Information System (IS) courses commonly focus too heavily on teaching application features, as opposed to teaching unstructured problem-solving skills. In response to this pedagogical gap, professors at Brigham Young University have developed integrated cases that improve the...

In its first 35 years, the U.S. laser industry was characterized by steady growth in output and the number of producers, whereas subsequently the number of producers steadily declined despite continued growth in the industry’s output. A model of industry evolution that features the creation,...

Empirical evidence on the evolution of innovation networks within high-tech industries is still scant. We investigate network formation processes by analyzing the timing of firms to enter R&D cooperations, using data on laser source manufacturers in Germany, 1990-2010. Network measures are...

We study how firm innovativeness is related to individual cooperation events and the structure and dynamics of firms’ ego-networks employing a unique panel dataset for the full population of 233 German laser source manufactures between 1990 and 2010. Firm innovativeness is measured by yearly...

The relationship between innovation and firm survival is analyzed for the population of German laser source producers from the beginning of the industry until 2005. Innovation effort is approximated by the generation of high quality patents in laser sources technology (IPC H01S) and by having...

The aim of the Fiblas project was to conduct innovative research to generate knowledge and technology to increase industrial efficiency in major load-bearing welded steel structures, exploiting the specific advantages of high-power fibre laser welding. Different material grades for the use of...

The relationship between innovation and firm survival is analyzed for the population of German laser source producers from the beginning of the industry until 2005. Innovation effort is approximated by the generation of high quality patents in laser sources technology (IPC H01S) and by having...