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wavelength Features
Life in the Ultrafast Lane with Fiber Lasers
For lasers, shorter pulses mean more precision and new applications. That’s been true for decades. What’s changed in the last few years is that prices for lasers with pulse widths a picosecond or less are dropping significantly. The...
Photonics.com, June 2016
New Approaches Improve Beam Expansion
Afocal beam expansion systems based on the basic principles of Kepler and Galileo telescopes can be improved in terms of wavefront quality by using additional optical surfaces or aspherizing them using monolithic beam expansion elements. Everyday...
Photonics Spectra, March 2014
Laser Gain Media: A Diverse Family of Materials
Various gain media used in laser technologies differ greatly in essential properties such as wavelength ranges and tunability, pumping options, efficiency, and capability for energy storage and high powers. Since the birth of the laser in 1960,...
Photonics Spectra, May 2013
Laser Trends: Laser Companies Look to Rocket Out of the Recession
Lasers are tools, no more and no less. They are used to illuminate and to burn, to mark items and to measure them. In many ways, they are as ubiquitous as knives and tape measures, and they are treated as common consumer products in many ways. Yet...
Photonics Spectra, January 2011
Smaller Features, Faster Wafers
The manufacturing of semiconductor wafers used in all types of electronics involves etching small features onto a wafer with lasers. This process ultimately is limited by the wavelength of the light itself. The semiconductor industry is rapidly...
Photonics.com, December 2010
Choosing a Material for Use in the Infrared
Creators of infrared systems often encounter difficulty when trying to select the proper materials for their optical designs. Part of the challenge is gathering information on the physical properties of IR materials. The other part is understanding...
Photonics Spectra, November 2010
To Step Up, Semiconductor Lithography Steps Down – Way Down
For semiconductors, smaller is better. That’s why the industry may soon take a big step down. On the horizon is a switch from 193- to 13.5-nm-wavelength lithography. This extreme-ultraviolet (EUV) technology eventually could allow an almost...
Photonics Spectra, August 2010
Laser Technology
If one reviews what happened in the first 50 years of the laser’s history, it becomes quite a challenge to predict what will happen in the next 50. Lasers went from being called “a solution in search of a problem” to becoming an...
Photonics Spectra, July 2010
Bending Light at will with Transformation Optics
Invisibility cloaks get all the publicity, but they may just be the beginning if the promise of transformation optics can be realized. The discipline could lead to smaller photonic and electronic devices and more cost-competitive solar cells –...
Photonics Spectra, May 2010
Photolithography Improved Without UV Light
As computer chips become smaller and more powerful, it is important that their features remain precise. The fact that smaller light wavelengths create smaller features has demanded that developers and manufacturers use expensive and difficult to...
Photonics.com, April 2009
Imperfect Tapping, Imperfect Image
Despite the saying, sometimes you can’t believe it when you see it. Researchers at Université de Technologie de Troyes in France, at the University of Illinois at Urbana-Champaign and at Argonne National Laboratory in Illinois have shown that this...
Photonics Spectra, December 2006
Making Gold in a Polyvinyl Alcohol Film
Fabricating gold nanoparticles in a polymer film by laser excitation is not new, but the problem has been that the high energy of the laser can damage the thin film. Researchers at Osaka University in Japan were interested in this method, however,...
Photonics Spectra, August 2006
Michelson Interferometry Interrogates Fiber Bragg Grating Sensors
Fiber Bragg gratings, which have had such success in wavelength division multiplexing for telecommunications, also have been adapted to environmental sensors. These sensors measure parameters such as temperature, pressure and strain, which cause...
Photonics Spectra, October 2003
Infrared Detectors Image the Future
The ability to see beyond the capabilities of normal human vision is vital in areas such as emergency services, defense, science, maintenance and surveillance, and all of these areas stand to gain by the latest advances in infrared imaging...
Photonics Spectra, April 2003
(14 results found)
April 2024
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