نتایج جستجو برای: laser cladding
تعداد نتایج: 186241 فیلتر نتایج به سال:
Abstract A semiconductor laser design for efficient, high power, brightness red light emission is proposed, using a large optical cavity asymmetric waveguide and bulk active layer (AL) positioned very close to the p -cladding. The low threshold carrier density associated with broad AL, as well proximity of AL -cladding, ensure that electron leakage current, major detrimental factor in lasers, s...
Certain copper alloys have proved to be suitable for laser cladding onto aluminium base. By using the blown powder technique with a 1.5 KW C02 laser, clads without cracks or porosity have been produced. The base material has the composition Al Si7 Mg0.3 and the clads are made from alloyed copper with varying contents of Ni, Fe, Si and Al. Aluminium dilution in the clad can be kept lower than 1 ...
Abstract The quantum defect (QD) is an important issue that demands prompt attention in high-power fiber lasers. A large QD may aggravate the thermal load laser, which would impact frequency, amplitude noise and mode stability, threaten security of laser system. Here, we propose demonstrate a cladding-pumped Raman (RFL) with less than 1%. Using gain boson peak phosphorus-doped to enable claddin...
Laser Cladding Treatment for Refurbishing Disc Brake Rotors: Environmental and Tribological Analysis
Abstract In this study, grey cast iron disc brake rotors are refurbished by adding a surface layer through laser cladding. Current methods to deal with replaced mainly include remelting, minority fraction disposed in landfill. Both approaches result huge waste of resources and an increase CO 2 footprint. From sustainable point view, study aims evaluate the feasibility refurbishing combined envi...
A nanoparticle (NP) doping technique was developed for fabricating erbium (Er)- and holmium (Ho)-doped silica-based optical fibers for high energy lasers. Slope efficiencies in excess of 74% were realized for Er NP doping in a single mode fiber based master oscillator power amplifier (MOPA) and 53% with multi-Watt-level output in a resonantly cladding-pumped power oscillator laser configuration...
Gain-switching is an alternative pulsing technique of fiber lasers, which is power scalable and has a low complexity. From a linear stability analysis of rate equations the relaxation oscillation period is derived and from it, the pulse duration is defined. Good agreement between the measured pulse duration and the theoretical prediction is found over a wide range of parameters. In particular w...
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