etinal laser photocoagulation was first described 45 years ago and remains the standard of care for many retinal diseases. The Diabetic Retinopathy Study established panretinal photocoagulation as an effective treatment for proliferative diabetic retinopathy. Conventional retinal laser photocoagulation for diabetic retinopathy, retinal vascular applications, and the treatment of retinal breaks ...

This paper describes a method for automatically recharging the batteries on a mobile robot. The robot used in this project is the Nomadic .TechnologiesTM Nomad XR4000 mobile robot. The battery recharging system was implemented using the robot's built-in sensors to control docking with a simple recharging station. The recharging station has an AC power plug, an infra-red beacon and a target desi...

The effects of pulse laser irradiation on the cortex of Paramecium caudatum and Blepharisma undulans undulans were studied. The character and extent of cortical injury was video recorded and subsequently analyzed. Destruction of the cytoskeleton by laser irradiation was detected by immunofluorescence staining. A difference in the development and healing of the wound was observed between Paramec...

In order to develop X-ray probes for Compton scattering on warm dense plasmas K-lines have been investigated by irradiation of solid targets with intense ultra-short pulsed lasers, e. g. spectroscopy of chlorine Kα (2p→ 1s) and Kβ (3p→ 1s) was performed at Europa Laser Facility LLNL. Measurements of the characteristic X-ray emission show that average line positions shift as function of laser en...

We demonstrate ultrafast incoherent depopulation of a quantum dot from above to below the transparency point using LA-phonon-assisted emission stimulated by a red-shifted laser pulse. The QD is turned from a weakly vibronic system into a strongly vibronic one by laser driving which enables the phonon-assisted relaxation between the excitonic components of two dressed states. The depopulation is...

We describe a novel layout for the measurement of the extracorporeal blood flow, performed by means of a laser diode placed directly in front of the blood vessel, without the need for any optical element. As the readout, we use the self-mixing interference in the laser diode due to light scattered by the red cells, whose Doppler shifted components comes from the intrinsic divergence of the lase...

Triple-doped (Yb(3+)/Er(3+)/Tm(3+)) KMnF3 nanocubes with uniform sizes of 250 nm were synthesized by a facile hydrothermal route using the oleic acid as the capping agent. It was found that these nanocubes can simultaneously exhibited four-color (blue, green, red and NIR) upconversion emissions under a single 980 nm near-infrared (NIR) laser excitation, which should have potential multicolor in...

In this study, we report the experimental findings of a multi-methodological and comparative investigation natural (from Wah Mountains Beaver County, Utah) three synthetic (hydrothermally grown) gem-quality red beryls by means of: gemmological standard testing, laser ablation inductively coupled mass spectroscopy, infrared Raman ultraviolet–visible–near absorption single-crystal X-ray diffracti...

the past few decades, rapid changes have taken place in the fields of science and technology. Simultaneously , great progress has been made in research work on laser applications. Today, laser use ranges from simple applications such as recording prices of groceries to complex applications such as measuring distance to the moon and laser-guided warfare. 1 In the field of dentistry, the research...

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 ...