A novel means of generating radially polarized light is reported in this paper. A birefringent plate was placed in a divergent or divergent portion of the laser beam for polarisation conversation. The influence of birefringent plate thickness on the purity and efficiency of radial beam conversion is studied qualitatively. This technique is robust, simple and cost effective for radial polarisati...

The purpose of the paper is to present a new laser diode range finding method. The system belongs to the category of flight time measurement. The optical power of the laser diode beam is modulated and then both emitted and returned signals are compared in order to obtain the delay or distance information. The new method is an estimation of the distance by correlation computation. The main advan...

Experiments were performed at a proton accelerator and an infrared laser facility to investigate the sound generation caused by the energy deposition of pulsed particle and laser beams in water. The beams with an energy range of 1 PeV to 400 PeV per proton beam spill and up to 10 EeV for the laser pulse were dumped into a water volume and the resulting acoustic signals were recorded with pressu...

050701-1 Saturation of a high-gain harmonic-generation free-electron laser (HGHG-FEL) at 266 nm has been accomplished at the Brookhaven National Laboratory/Deep Ultra Violet Free Electron Laser Facility (BNL/DUV-FEL) by seeding with an 800 nm Ti:sapphire laser. We describe the diagnostics used to characterize the electron beam and the FEL output. Analytic and simulation calculations of the HGHG...

Airborne lidar technology is demonstrating outstanding results in generating high-accuracy spatial data for a wide range of terrestrial mapping applications. However, the data quality and accuracy achievable in real survey conditions depend on many different factors. The laser footprint size plays a crucial role in both the vertical and horizontal accuracy of the data collected over sloped or n...

The National Ignition Facility (NIF) is a 192-beam laser system designed to study high energy density physics. Each beam line contains a variety of line replaceable units (LRUs) that contain optics, stepping motors, sensors and other devices to control and diagnose the laser. During commissioning and subsequent maintenance of the laser, LRUs undergo a qualification process using the Integrated ...

OBJECTIVE The aim of this study is to evaluate the effectiveness of Nd:YAP laser to seal dentinal tubules at different parameters. MATERIAL AND METHODS 24 caries-free human wisdom impacted molars were used. The crowns were sectioned transversally in order to totally expose the dentin. The smear layer was removed by a 1 min application of EDTA. Each surface was divided into four quadrants, but...

Laser patterning is a key industrial process in the manufacturing of organic light emitting diode (OLED) displays, solid-state lighting foils and solar cells. Ultrafast lasers are of particular interest for this application as they may enable selective ablative removal of OLED layers with minimal energy density requirements on the target. Since sufficient laser output from commercial laser sour...

M. Schollmeier1, M. Geißel2, K. Flippo3, S. Becker4, A.Blažević5, F. Grüner4, K. Harres1, F. Nürnberg1, P. Rambo2, U. Schramm6, J. Schreiber4, J. Schütrumpf1, J. Schwarz2, B. Atherton2, M. Roth1, D. Habs4, and B.M. Hegelich3,4 1TU, Darmstadt, Germany; 2SNL, Albuquerque, NM, USA; 3LANL, Los Alamos, NM, USA; 4LMU, München, Germany; 5GSI, Darmstadt, Germany; 6FZD, Dresden, Germany The acceleration...