In the present investigation, H13 tool steel has been deposited on copper alloy substrate using both CO2 and diode laser. A detailed parametric analysis has been carried out in order to find out optimum processing zone for coating defect free H13 tool steel on copper alloy substrate. Followed by parametric optimization, the microstructure and microhardness of the deposited clads have been evalu...

We report the demonstration of a compact, all-solid-state polymer laser system comprising of a Gallium Nitride (GaN) semiconductor diode laser as the pump source. The polymer laser was configured as a surface emitting, distributed Bragg reflector laser (DBR), based on a novel energy transfer blend of Coumarin 102 and the conjugated polymer poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinyl...

We investigate the different characteristics of the intensity noise of a laser-diode-pumped single-frequency ring Nd:YVO (4) laser and a Nd:YVO (4)-KTP green laser. By use of an optoelectronic feedback circuit connected directly to the pump current of the laser diode, the low-frequency intensity noise of the intracavity frequency doubler was suppressed to some extent.

PURPOSE The present pilot study evaluates the histopathological characteristics and suitability of CO2 and diode lasers for performing excisional biopsies in the buccal mucosa with special emphasis on the extent of the thermal damage zone created. PATIENTS AND METHODS 15 patients agreed to undergo surgical removal of their fibrous hyperplasias with a laser. These patients were randomly assign...

introduction: the purpose of this study was to evaluate the antimicrobial photodynamic therapy (apdt) and low level laser therapy (lllt) on wound healing, pain intensity, swelling problems, halitosis and the postoperative usage of analgesics after surgical removal of lower third molars. methods: one hundred and fifty patients, randomly divided into three groups were selected (50 per each group)...

OBJECTIVE To evaluate the capability of soft laser light to penetrate blood, serum, gingival connective tissue and pure collagen type I. MATERIALS AND METHODS A 1:1 mixture of methylene blue (MB) and diphenylisobenzofuran (DPBF) was irradiated for 60 s with a diode laser (670 nm, 0.3 W) through blood, serum, gingival connective tissue and collagen type I (2 mm transillumination thickness). Th...

New Laser Crystallization using Blue Laser-Diodes is reported and discussed. As a result of the blue laser diode annealing (BLDA) scanning at 500 mm/s for 50 nm-thick Si films, remarkable crystallization occurred while maintaining the surface’s smoothness not only for CVD film but also for sputtered film. By changing the laser power, the grain size can be controlled from micro-grains to large g...

according to the english literature, various lasers and light sources (i,g. argon ion lasers, pulsed ktp lasers, diode lasers and nd:yag lasers, pulsed dye laser(pdl), intense pulsed light sources (ipls) are applicable for the treatment of different vascular lesions. these conditions are the most important indication for laser therapy. this review summarizes the current literature on ipl with r...

White light was generated from a single silica thin film made with Yb0.75La0.2Eu0.05F3, La0.45Yb0.5Er0.05F3, and La0.75Yb0.2Tm0.05F3 nanoparticles by exciting with a single source near-infrared light (980 nm CW diode laser). Eu3+ and Tm3+ ions are responsible for red and blue emission, respectively. Er3+ ion is responsible for green as well as red emission. The Commission Internationale de l'Ec...

We describe an efficient Q-switched laser emission from a directly grown Er :YAG single-crystal fiber resonantly pumped by a laser diode in an off-axis configuration. The laser produces 2 mJ, 38 ns pulses at 1 kHz. OCIS codes: (140.3580) Lasers, solid-state, (140.3480) Lasers, diode-pumped, (140.3540) Lasers, Q-switched, (140.3380) Laser materials, (140.3500) Lasers, erbium.