We report the first application of a thermoelectrically cooled, distributed-feedback quantum-cascade laser for continuous spectroscopic monitoring of CO in ambient air at a wavelength of 4.6 microm. A noise-equivalent detection limit of 12 parts per billion was demonstrated experimentally with a 102-cm optical pathlength and a 2.5-min data acquisition time at a 10-kHz pulsed-laser repetition ra...

The application of a commercially available spatial light modulator (SLM) to control the spatial intensity distribution of a nanosecond pulsed laser for micromachining is described for the first time. Heat sinking is introduced to increase the average power handling capabilities of the SLM beyond recommended limits by the manufacturer. Complex intensity patterns are generated, using the Inverse...

Lasers, including C 0 2 lasers operating around A = 10 pm, are being used frequently in dental soft tissue surgery and some dental hard tissue applications. In addition, pulsed C 0 2 laser irradiation has been applied successfully for in vitro caries (dental decay) prevention or retardati0n.l For this application the laser is used for very localized surface heat treatment with or without induci...

it is of utmost importance to make children interested in and willing to use dental services in order to prevent and treat oral diseases. therefore, pediatric dental practitioners need to learn new technologies such as lasers, in addition to basic principles. lasers have opened new horizons in the treatment of both soft and hard oral tissue problems in children. the present article describes ap...

Background: Numerous lasers are currently available for hair removal. Objective: To study the efficacy of a pulsed diode laser for removing unwanted hair. Patients and Methods: In this quasi-experimental clinical trial, 39 patients with unwanted hairs on chin referred to Novin-Didegan Laser Center in Tehran were treated with a diode laser system (Palomar, 810nm). Fluences ranging from 40 to 64 ...

Pulsed dye laser (PDL) is an effective treatment for port- wine stain and can cause some short- term and long- term side- effects. Pyogenic granoluma is one of its late- onset adverse effects. Herein, we present two cases of pyogenic granoluma following treatment of port- wine stain with PDL.

Port- wine stain is a congenital vascular malformation originating from superficial dermal vessels which is characterized by ectasia of the capillaries. Currently, pulsed dye laser (PDL) is used to treat these vascular lesions. To date, there are few reports of eczematous lesions due to PDL. Herein, we report three cases of eczema following PDL, used for treatment of port- wine stain in Razi ho...

In an attempt to clarify whether pulsed lasers might be able to cause permanent fistulas from the anterior chamber to the interior of the canal of Schlemm, slightly suprathreshold, low energy, small diameter Q-switched ruby laser pulses were applied to the trabecular meshwork of nine eyes of six rhesus monkeys. Clinical examinations during the next 2 months disclosed no adverse effect on the co...

A pre-annealing atmospheric pulsed laser exposure was applied to decrease the phase transition (from chemically disordered A1 phase to chemically ordered L10 phase) temperature of FePt nano-particles on a Si (100) substrate. Different pre-annealing laser energy densities of 0.024 and 0.079 J/cm were utilized to expose the pulsed laser deposition (PLD) FePt thin film samples under atmospheric co...