There is now a growing interest in the use of laser-generated ultrasound for nondestructive evaluation of materials [1,2]. In the case of nonmetals, the laser-ultrasonic displacement signals result from temporal convolution between the optical penetration, the laser pulse duration and the laser spot extension [3,4]. The temporal information present in the first longitudinal arrival called "the ...

This study presents the results of studying optical, strength, dielectric and screening characteristics 0.6TeO 2 0.25BaO-0.15ZnO glasses. The method mechanochemical grinding initial oxide components followed by thermal sintering in order to obtain vitreous samples with an amorphous structure was chosen as preparation method. To characterize obtained samples, methods scanning electron microscopy...

To accommodate rapidly increasing quantities of information and communication, optical fiber transmission technology with high-speed high-capacity is demanded. The development of an optical gain medium and fiber amplifiers to cover the 1250~1650 nm region, which is the entire optical telecommunication windows of silica fiber, becomes an important issue for ultra-wide broadband optical communica...

We report on the fabrication of the stressed optical waveguide with tubular depressedrefractive-index cladding in phosphate glasses by use of femtosecond vortex beam. Strained regions were emerged in domains surrounding the tubular track. Waveguiding occurs mainly within the tube induced by femtosecond laser.

In this paper, we introduce a new compressive display architecture for superresolution image presentation that exploits co-design of the optical device configuration and compressive computation. Our display allows for superresolution, HDR, or glasses-free 3D presentation. OCIS codes: 120.2040, 080.1753.

PURPOSE To investigate the possibility of multifocal or aspherical treatment of the cornea with optical ray tracing. SETTING Institute for Refractive and Ophthalmic Surgery, Zurich, Switzerland. METHODS The optical consequences of 4 corneal shapes-global optimum (GO) for curvature and asphericity, central steep island (CSI), decentered steep island (DSI), and centered steep annulus (CSA)-fo...

Problem statement: Systematic series of ZnO-TeO2 glasses with mole fraction of 0.10-0.40 ZnO content with an interval of 0.05 were studied to obtain their physical and optical properties. Approach: All the glass samples were synthesized by rapid melting quenching method under controlled conditions, while their refractive indices (n) were measured by the EL X-02C high precision ellipsometer. The...

the monolithic oxynitride glasses in sio2-al2o3-b2o3 system were synthesized using sol-gel method. the porous, dried gels were heated in flowing ammonia for different times and varying temperatures. the nitrogen content of the oxynitride glasses was determined using an oxygen-nitrogen analyzer. the chemical bonding state and properties of glasses were investigated by means of fourier transform ...