Nanoporous silicon optical waveguides, which serve as the basic foundation for porous silicon based biochemical sensors, have been fabricated by electrochemical etching and laser local oxidation. By optimizing the porous silicon layers, laser writing power and speed, acceptable optical losses have been achieved. Loss mechanisms include scattering, intrinsic absorption, coupling loss at the fibe...

Laser scanning of fiber angles has shown to be a powerful tool to establish bending MOE profiles along boards. This study aims at investigating the accuracy of the MOE variation determined on basis of fiber angles obtained from laser scanning. Material employed was a board of Norway spruce of dimension 50×150×3900 mm. Firstly fiber angles on four surfaces were identified using a WoodEye scanner...

Gas phase ion mobility measurements can resolve structural isomers for polyatomic ions and provide information about their geometries. A new experimental apparatus for performing high-resolution ion mobility measurements is described. The apparatus consists of a pulsed laser vaporization/desorption source coupled through an ion gate to a 63-cm-long drift tube. The ion gate is a critical compone...

In recent years, laser resection of lung metastases has been established as the standard procedure worldwide. To avoid airway fire, it is necessary to collapse the surgical lung. The selective lobar bronchial blockade is a technique that allows one-lung ventilation while the operated lobe is collapsed in patients with previous pulmonary resection requiring subsequent resection or with limited p...

We propose a method to automatically design bending-active structures, made of wood, whose silhouettes at equilibrium match desired target curves. Our approach is based on the use parametric pattern that regularly laser-cut structure and allows us locally modulate bending stiffness material. To make problem tractable, we rely two-scale where first compute mapping between average mechanical prop...

We present pulsed laser operation in a Nd-doped, Y3Al5O12-based silica fiber. The fiber was fabricated using the rod-in-tube technique with a Nd:YAG crystal rod as the core material and a silica tube for the cladding material. A spectroscopy study revealed that the core region had become amorphous in the process of fiber drawing. Q-switched pulsed laser operation was realized at a wavelength of...

We present a novel approach to monitoring the surface deformations during various types of laser processing, e.g., engraving, marking, cutting, bending, and welding. The measuring system is based on a laser triangulation principle, where the laser projector generates multiple lines simultaneously. This enables us to measure the shape of the surface with a high sampling rate (80 Hz with our came...