A new mechanism for the generation of high intensity speckles by coupling overlapping beams is discovered and studied in detail. Using three-dimensional simulations, smoothed phase plates polarization smoothing are investigated regime relevant to inertial confinement fusion studies. It found that distribution laser beam spot can be changed nonuniform spatial modulation, formed plate split into ...

background: neuropathic pain (np) is a serious suffering medical condition that frequently leads to disability and life style changes. although the exact mechanisms of np are still unknown, recently the role of reactive oxygen species (ros) reported as an important factor for np. apoptosis, increase of atp production and reduction of antioxidants are also the other factors influencing in np. th...

PURPOSE TO EVALUATE THE EFFICACY AND SAFETY OF THE HOLMIUM: yttrium-aluminium-garnet (YAG) laser for the treatment of urethral/bladder neck strictures after high-intensity focused ultrasound for prostate cancer. METHODS Between February 2007 and July 2010, Holmium: YAG laser urethrotomies were performed in eleven patients for bladder neck strictures or prostatic urethral strictures. The laser...

High-power, nanosecond-pulse Q-switch laser processing has become commonplace in both existing and emerging high-tech industries. As these industries grow and mature, there is increased need for low-cost, high-quality manufacturing techniques. This translates to a need for increasingly precise and efficient laser processing capabilities. In this work, Newport/Spectra-Physics’ latest Q-switch di...

the modulation response, relative intensity noise and frequency noise characteristics of qd lasers are investigated theoretically, in presence of an additional optical pumping. it is revealed that the modulation response of qd laser enhances under additional optical beam. by small signal analysis of the carriers' and photons' rates, it is proposed that by injecting excess carriers to ...

Contamination and materials degradation are among the highest risks associated with the deployment of high intensity solid-state laser systems. Although high intensity laser induced optical damage has been studied for decades, the field is still in its infancy. There is little concrete information concerning the relationship of contamination and laser induced optical damage. Further, little inf...

The challenge of producing the next generation of particle accelerators, for both fundamental research at laboratories such as CERN and more applied tasks such as proton therapy and nuclear transmutation, has been taken up by the high-intensity laser community. With the advent of chirped pulse amplification (CPA) in 19851 came the ability to generate ultrashort laser pulses with intensities in ...

180 LLE Review, Volume 79 Since the discovery of the ponderomotive force over 40 years ago, it has been known that charged particles interacting with an oscillating electromagnetic field will seek regions of low intensity.1 It was immediately proposed that with the appropriate field distribution, particles could be trapped with this force.2 The case of electron confinement with a specially shap...