The Diagnodent device is based on principles of caries detection by laser fluorescence which were developed in Sweden in the mid-1980s. Since that time, several lasers have been employed for caries detection (such as the argon, carbon dioxide, and excimer lasers). These systems are however more complex to use and more expensive than the visible red diode laser system upon which Diagnodent® is b...

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...

Volume Bragg gratingTM (VBGTM) technology has been shown to improve spectral characteristics of the high-power laser diodes and arrays. We review the recent advances in VBG technology that lead to better spectral performance as well as improvements in spatial brightness of the high-power laser diode arrays. The VBG technology has been applied to manufacturing of high-power laser diode arrays su...

High-brightness lasers are widely used in fields such as spectroscopy, infrared countermeasures, free-space communication, and industrial manufacturing. Integration of a broad-band, multi-spectral laser is made possible by heterogeneously integrating multiple gain materials on one silicon (Si) substrate chip. A single multi-spectral output with high beam quality can be achieved by wavelength be...

Stereolithography is a Rapid Prototyping & Manufacturing (RP&M) technique which is used to produce 3 dimensional plastic parts directly out computer files generated by CAD. Stereolithography systems use ultraviolet lasers to solidify liquid resin into the desired form as defined by the CAD file. In recent years, solid state laser technology has reached the point where it can be applied to stere...

We report on the performance of a commercial, non-AR coated diode laser bar, consisting of 20 emitters, which uses an external cavity to achieve 16 W of bandwidth-narrowed output and 2.9 W of dual wavelength emission. These are the highest output powers reported so far for this type of cavity and diode laser array. Introduction For numerous scientific and industrial applications it is of intere...

The aim of this study was to present a case report of surgical removal of chronic inflammatory gingival enlargement using diode laser.The presence of irritative factors in the mucosa triggers a chronic inflammatory process leading to the formation of hyperplastic asymptomatic fibrous tissue.A 38 year old male patient reported with a chief complaint of swelling in the gums of teeth in upper fron...

A multiplexed diode-laser sensor system, comprised of two InGaAsP diode lasers and fiber-optic components, has been developed to non-intrusively measure temperature and species concentration over a single path for closed-loop process control using laser absorption spectroscopy techniques. The system was applied to measure and control the gas temperature in the post-flame gases 6 mm above the su...

Background and aim: Use of laser technology in endodontics has greatly increased in the recent years due to the introduction of new wavelengths and methods and optimal antimicrobial and smear layer removal properties of lasers. This in vitro study aimed to compare the antibacterial effects of diode lasers of 810 nm and 980 nm wavelength on Enterococcus faecalis (E. faecalis) biofilm in the root...

There are several challenges in the development of semiconductor lasers for the near mid-infrared region of 2-3 μm. Approaches being developed to produce lasers in this range include extending the wavelength of inter-band diode lasers which perform relatively well below ~2.5 μm. Such lasers are, however, strongly affected by increased optical losses and non-radiative Auger recombination which d...