Laser assisted machining is an alternative to conventional machining of hard and/or difficult-to-process materials which involves pre-heating of a focused area with a laser beam over the surface of the workpiece to cause localized thermal softening along the path of the cutting action. The main advantage that laser assisted machining has over conventional machining is the increased material rem...

A compact UV pulsed laser pumped by high-power two-dimensional arrays of vertical-cavity surface-emitting lasers (VCSELs) was presented. A passively Q-switched 1064-nm Nd:YAG laser was side-pumped by kW-class 808-nm VCSEL pump modules and the output pulses were frequency quadrupled to 266-nm. 10-ns, 0.68-mJ UV pulsed output was obtained at 1.33k-Hz repetition rate. The average UV power is > 0.9...

The anisotropic two-dimensional (2D) electron diffraction pattern of jet-cooled CS2 in an intense nanosecond Nd:YAG laser field (1064 nm, -0.64 TW/cm, 10 ns) was measured by a short-pulsed 25 keV electron beam packet (~7 ns) generated by irradiating a tantalum photocathode with the 4th harmonics of another nanosecond pulsed YAG laser light. It was confirmed from the numerical simulation of the ...

We report on the construction of a new laser test stand equipped with a 1064nm pulsed infrared YAG laser for simulating the passage of a charged particle in a silicon detector. The standard semiconductor repairing tool, the socalled laser-cutter, has been modified to have a newly developed optics which has the ability to reduce the light by the order of 106~108 and to adjust the spot size to se...

Unilateral nevoid telangiectasia (UNT) is a rare disease characterized by punctuate and stellate telangiectasias that follow dermatomal distribution.1 Its etiology remains elusive; no standard treatment currently exists. We describe a 14-year-old Asian female (skin type IV) with UNT, who underwent treatment with long-pulsed 1064-nm Nd:YAG laser and 595-nm pulsed dye laser for her disease. The p...

Laser ablation of solids in liquids technique has been used to obtain colloidal nanoparticles from biological hydroxylapatite using pulsed as well as a continuous wave (CW) laser. Transmission electron microscopy (TEM) measurements revealed the formation of spherical particles with size distribution ranging from few nanometers to hundred nanometers and irregular submicronic particles. High reso...

BACKGROUND AND OBJECTIVE Analgesic cooling technologies are firmly established in dermatologic laser therapy. We present cold air as a novel method of cooling and compare it with those methods that are already in use. STUDY DESIGN/MATERIALS AND METHODS We treated 166 patients with the diagnoses hypertrichosis, port wine stains, hemangioma, essential telangiectasias, and tattoos with different...

PURPOSE To explore the tissue ablation properties of pulsed 266-nm and 213-nm laser radiation in porcine retina and the potential for 213-nm laser radiation to cut through human trabecular meshwork. METHODS Segments of porcine retinas were used, and localized areas of tissue were exposed to 266-nm or 213-nm laser. Human trabecular meshwork from donor eyes was also ablated using pulsed 213-nm ...

Chie C. Poon Andrew C. Tam IBM Almaden Research Center 650 Harry Road San Jose, California 95120 Abstract. We investigate deformation of stainless steel and ceramic specimens with a precision of the order of tens of nanometers using a pulsed laser beam. Such a technique is useful, for example, in a process of removing distortions on magnetic head components to achieve a better contact between t...

a three-step selective photo-ionization for gd155 and gd157 isotopes by pulsed laser wasevaluated numerically. due to large thermal neutron absorption cross sections, these two isotopes innatural gadolinium are good candidates as burnable poison to control reactivity early in the fuel cycleand allow extended fuel burn up. rate equations have been used to calculate the dynamics of the isotopepop...