NakuLaser Blog

From checkout counters at supermarkets to light shows at concerts, lasers are everywhere, and they're a much more efficient light source than incandescent bulbs. But they're not cheap to produce. A new Northwestern University study has engineered a more cost-effective laser design that outputs multi-color lasing and offers a step forward in chip-based lasers and miniaturization. The findings could allow encrypted, encoded, redundant and faster information flow in optical fibers, as well as multi-color medical imaging of diseased tissue in real time. The study was published July 10 in Nature Nanotechnology. "In our work, we demonstrated that multi-modal lasing with control over the different colors can be achieved in a single device," said senior author Teri W. Odom, a Charles E. and Emma H. Morrison Professor of Chemistry in the Weinberg College of Arts and Sciences at Northwestern. "Compared to traditional lasers, our work is unprecedented for its stable mul

The interaction of high-power laser light sources with matter has given rise to numerous applications including; fast ion acceleration; intense X-ray, gamma-ray, positron and neutron generation; and fast-ignition-based laser fusion. These applications require an understanding of energy absorption and momentum transfer from the high-intensity lasers to plasma particles. A group of Japanese researchers led by Osaka University has proposed that substances heated with high-power lasers produce an ultrahigh pressure plasma state, comparable with those found at the centers of stars, and that the surface tension of the plasma can push back light. Since lasers with energies capable of heating material sufficiently to create this pressure had not been available to date, the process had not been considered. Their work published in Nature Communications describes their theory and supporting simulations. "Understanding extreme high pressure states created by laser light interacting with

This laser-based wireless charging system was created by University of Washington engineers. The charging laser and guard lasers are normally invisible to the human eye, but red beams have been inserted here in place of the guard beams for demonstration purposes. Researchers at the University of Washington (Seattle, WA) have designed and experimentally demonstrated a laser-based line-of-sight wireless power delivery system that could be used, for example, for charging smartphones and other devices.1 The researchers say that the system delivers more than 2 W of power safely over distances of 4.3 and 12.2 m for a smartphone (25 cm2) and tabletop form factor (100 cm2) receiver, respectively. The system uses a high-power laser-diode source with a 978 nm wavelength, along with two steerable mirrors to aim the beam at the receiver; a photovoltaic cell, heatsink, and retroreflector at the receiver; and a low-power guard laser beam to serve as a safety interlock (using the retroreflector),

TOPTICA's TopWave product line of industrial continuous-wave UV laser reaches a new power level. The latest member, TopWave 266, is now available with 300 mW output power at 266 nm. It provides a first-class lifetime (> 10,000 h), outstanding low-noise performance (typ. < 0.1% RMS) and excellent power stability (< 1 %). Adding premium beam quality (M² < 1.3), high wall-plug efficiency (no chiller needed) and a compact footprint, this narrow linewidth (< 1 MHz) system is more than just a coherent laser. The TopWave 266 meets the needs for high reliability of demanding applications like semicon inspection, optical lithography, FBG fabrication, laser mastering and Raman spectroscopy. Its complete UV beam path, including TOPTICA’s proprietary SUV doubling cavity, is enclosed in a specially sealed compartment which guarantees ultimate stability. In combination with a fully automated optics shifter it enables typical lifetimes well above 10,000 hours, thus notably exten