In this Work, Laser energy effects on optical and morphological properties of TiO2 thin film has been carried out using Reactive Pulsed Laser as a Deposition technique (RPLD). Q-switched Nd-YAG laser with (λ=1.06μm, t =7nsec) and different energies have been used to ablate pure Titanium target and deposited thin films on glass substrates with constant substrate temperature of (343K). The optica...

We describe a balanced heterodyne detection method for a Sagnac interferometer that uses a polarization-dependent beam splitter. The signal and the local oscillator are orthogonally polarized components of a single laser beam, permitting the detection of the signal by subtraction of two photocurrents produced in appropriate polarization projections. Using this scheme, we experimentally demonstr...

In this paper, a methodology for self-calibrating a multi-beam laser tracking measurement system with planar constraints is proposed. A model for the multiple-beam laser tracking system is derived. Through error analysis it is shown that using even rough angular measurement of the gimbal joint positions may improve the overall system calibration results. Parameter observability issues are studi...

We present a thermal conductivity measurement method for laser crystals based on thermal mapping of the crystal face by an infrared camera. Those measurements are performed under end-pumping of the laser crystal and during laser operation. The calculation of the fraction of pump power converted into heat is therefore simplified, and it is possible to link easily the temperature in the crystal t...

Ultrafast laser pump-probe spectroscopy is an important and growing field of physical chemistry that allows the measurement chemical dynamics on their natural timescales, but undergraduate laboratory courses lack examples such interpretation occur. Here we develop implement ultrafast experiment for course at University California Berkeley. The goal to expose students concepts in solid-state via...

We developed a combined system of tumor detection by 5-ALA-induced PpIX fluorescence and precise ablation by micro laser for the first time, with an automatic focusing and robotic scanning mechanism for the brain surface. 5-ALA accumulates on tumors to be metabolized to become PpIX that is a fluorescent. Intra-operative detection of 5-ALA induced PpIX fluorescence provides useful information fo...

A tightly focused laser beam (laser wire) is used for measurement of transverse electron beam sizes in storage rings and linear colliders. It is assumed that the laser beam does nothing with the electron beam except Compton scatter-ings which happen with a rather small probability. In reality , electrons crossing the laser beam get kicks (with 100% probability) proportional to the square of the...

Abstract We explore the light induced dynamics in superfluid helium nanodroplets with wide-angle scattering a pump–probe measurement scheme. The droplets are doped xenon atoms to facilitate ignition of nanoplasma through irradiation near-infrared laser pulses. After variable time delay up 800 ps, we image subsequent using intense extreme ultraviolet pulses from FERMI free-electron laser. record...

This paper presents a simple, low-cost, and novel technique for measuring the temporal pulse shape of a nanosecond laser pulse accurately and consistently. The measurement configuration consists of a focusing lens, a tapered rod, and a digital noise filter. Using this setup, the pulsewidth of a nitrogen laser has been determined experimentally. Compared with an unaided measurement configuration...

The paper studies about a line-laser based vision system to measure structural adhesive as a non-invasive inspection. It proposes a novel vision system to measure height and width of adhesive (or object) by optical triangulation using line-laser, and analyzes for resolution, gaze angle, focal length and baseline of vision camera, proper to measurement. The validity of the proposed method was ve...