We report the generation of white light comprising red, green, and blue spectral bands from a frequency-doubled fiber laser in submicron-sized cores of microstructured holey fibers. Picosecond pulses of green light are launched into a single suspended core of a silica holey fiber where energy is transferred by an efficient four-wave mixing process into a red and blue sideband whose wavelengths ...

introduction: skeletal staining is an important part of anatomical studies which can evaluate macroscopic disorders in bones and cartilages development. the aim of the present article is to illustrate two distinct protocols by all details in order to stain skeletal system of the lab animals in all ages of their lives so it becomes easy for future studies in this field. methods: in this paper, s...

Several fluoride and oxide Tm and (Tm, Yb) doped crystals such as YLF, GLF, YAG, and YAlO3 were tested for pulsed lasing at the ID2 -+ 3 ~ 4 transition (453 nm blue) at room temperature under two step pumping by a Ti:sapphire and a dye laser. Laser operation was obtained for the fluoride crystals. The input-output curves exhibit a saturation effect of emission with respect to both pump lasers. ...

Imaging the four fluorescence bands of leaves, red (F690) and far-red (F740) chlorophyll (Chl) as well blue (F440) green (F520) leaves corresponding ratios is a fast excellent nondestructive technique to detect photosynthetic activity capacity gradients over leaf area effect various strain stress parameters on plants. This review primarily deals with first pioneering multi-colour imaging result...

The aim of this study was to evaluate the effects of the laser radiation (685 nm) associated with photosensitizers on viability of different species of Candida genus. Suspensions of Candida albicans, Candida dubliniensis, Candida krusei and Candida tropicalis, containing 10(6) viable cells per milliliter were obtained with the aid of a Neubauer's chamber. From each species, 10 samples of the ce...

In this master thesis project, a solid-state red-green-blue (RGB) laser was built. The project consisted of two parts. In the first part, an actively Q-switched diode-pumped solid-state laser was constructed. As laser gain medium, a Nd:YVO4 crystal, which lased at 1064 nm, was used. The Q-switch was a home built electrooptic modulator based on two RTP crystals. The modulator had a shortest rise...

BACKGROUND Millisecond pulse duration 1064-nm Neodymium:YAG (Nd:YAG) lasers have been shown to be effective in the treatment of some lower leg telangiectases. OBJECTIVE To evaluate the efficacy and complication rate of a millisecond pulse duration 1064-nm Nd:YAG laser in the treatment of facial telangiectases. METHODS Fifteen subjects were evaluated. RESULTS Moderate to significant improv...

Triplet-triplet annihilation upconversion (TTA-UC) is a promising photophysical tool to shift the activation wavelength of photopharmacological compounds to the red or near-infrared wavelength domain, in which light penetrates human tissue optimally. However, TTA-UC is sensitive to dioxygen, which quenches the triplet states needed for upconversion. Here, we demonstrate not only that the sensit...

PURPOSE Angioscotomas are scotomata caused by vessel shadows. Their extent may be influenced by physiological and pharmacologic conditions and disease. In this study, the authors quantified angioscotomas in normal subjects using a fundus perimetry technique with a scanning laser ophthalmoscope. They further investigated the influence of two different wavelengths on scotoma depth. METHODS For ...

OBJECTIVE To show true color scanning laser ophthalmoscope (SLO) images produced by simultaneously imaging the retina with red, green, and blue lasers. METHODS Low-power red, green, and blue lasers were combined using fiber optics. By rapidly pulsing the lasers, each point on the fundus is illuminated by the 3 colors in quick succession, with the total power level being similar to that from a...