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In Search of High-Power Optics
Advances in high-power and high-energy laser systems have made available power densities in excess of 109 W/cm2. At such power levels, a number of damage mechanisms can lead to per...
Photonics Spectra, September 2001
In Search of the Ultimate Diode Laser
High-power diode lasers are a focal point for laser technology. In recent years, they have developed from an attractive but costly solution for niche markets into a key laser produ...
Photonics Spectra, September 2001
In Search of the Ultimate Image Sensor
The mainstream in image sensors for high-end studio photography has been 6-megapixel CCDs, and the market is now adopting 16.8-megapixel image sensors as the new reference standard...
Photonics Spectra, September 2001
Photonics Design & Solutions
A number of applied optical measurement tasks require measuring linear displacement or elevation of a radiant source.    Many typical photodiode arrays designed for this purpose u...
Photonics Spectra, September 2001
Photonics Pointers
Although a lot of unused fiber sits in the ground, many links in fiber optic networks operate at or near capacity. The importance of each line has increased with the amount of traf...
Photonics Spectra, September 2001
Technology Close-Up
For designers of fiber optic systems, the goal has always been to provide more capacity at lower cost per bit. For more than 20 years, the capacity of systems has doubled every 18 ...
Photonics Spectra, September 2001
Electronics Inspection: A Portrait in Speed
Last year, the electronics industry accounted for 21.4 percent of machine vision units sold in North America. The segment is second only to the semiconductor market, which represented 34.7 percent, according to the Automated Imaging Association....
Photonics Spectra, August 2001
Photonics Design and Solutions
With today’s variety of interferometer applications, it is difficult for standard interferometry software to support the needs of many businesses. The ideal analysis or result is frequently unavailable or requires a multistep manual process to...
Photonics Spectra, August 2001
Photonics Pointers
Airline maintenance workers often use hard dry ice particles in a spray to remove paint from surfaces under conditions where it might be difficult to clean up sand or other spray materials that remain behind. After the dry ice particles hit the...
Photonics Spectra, August 2001
Putting Photonics on the Line
The scene inside XeTel Corp. of Austin, Texas, is one that Henry Ford could relate to -- though it’s a far cry from yesterday’s automobile plants. The manufacturing floor within the 120,000-square-foot facility is brightly lit. It is...
Photonics Spectra, August 2001
Staff Report: Hubble Space Telescope
As darkness falls, a solitary man trudges up the hillside to a lonely domed building. His breath sends clouds of mist into the chilly air as he enters the building and flicks a switch, splitting the dome open to reveal the night sky. He walks up to...
Photonics Spectra, August 2001
Technology Close-Up
The rapid growth in the demand for bandwidth has fueled an increasing global market for high-speed fiber optic components and networking systems. Recent trends toward tighter channel spacing and higher data rates also has led to a greater demand for...
Photonics Spectra, August 2001
Vying for Vias
As communications devices -- cell phones, pagers and personal digital assistants -- become smaller and more intelligent, their enabling high-density printed circuit boards can have as many as 10,000 holes. The limitations of making these holes is...
Photonics Spectra, August 2001
A Little off the Top
Camera manufacturers are bundling ever more functionality into smaller packages. A look at recent camera introductions shows that this year’s hot new full-function cameras are the same size as remote camera heads from a couple of years ago....
Photonics Spectra, July 2001
Let’s Get Small
As comedian Steve Martin urged in his now-classic stand-up routine: "Let’s get small." The point has not been lost on semiconductor laser physics. While the work is largely confined to university and government research labs, advances in...
Photonics Spectra, July 2001
Little Lenses, Major Markets
Innovation comes about when either a technological advance finds a profitable market or a market need drives a technological advance. In the case of small lenses, a good mixture of both of these forces has created a large microlens industry over the...
Photonics Spectra, July 2001
Photonics Design and Solutions
We, as polishers, are constantly pursuing the perfect surface. We want it flat -- very flat -- and we want it smooth -- very smooth. But what does that really mean? Is root mean square (rms) surface roughness the answer? We can take rms readings to...
Photonics Spectra, July 2001
Size and Spectrum
Photonics is increasingly influencing our lives, even if many people do not realize it. For example, fields such as semiconductor, chemical, food and color analysis; light source and pollution measurement; medical diagnostics; and telecommunications...
Photonics Spectra, July 2001
Staff Report: Growing by Design
Anybody who has blasted music from a cranked-up stereo system is probably familiar with the hiss emitting from the speakers between songs. The sound, which comes from the amplifier electronics, is usually forgotten with the first chords of the next...
Photonics Spectra, July 2001
Technology Close-Up
What do inspection machines, camera strobes, airplanes, operating rooms, lasers, extraterrestrials and Broadway stages have in common? They need high-intensity lighting. Xenon lamps have found their way into all of these applications -- except maybe...
Photonics Spectra, July 2001
CLEO Show Highlights
True to its name, the 2001 Conference on Lasers and Electro-Optics in Baltimore showcased the latest in laser technology. Most of the new technology on the conference's exhibit floor emphasized diode-pumped, solid-state sources, several operating in...
Photonics Spectra, June 2001
Design & Solutions
Modern communications system providers are striving to increase the capacity of their networks to satisfy the rapidly growing exchange of information around the world. Raising the data rate of a single-wavelength channel is one way to increase the...
Photonics Spectra, June 2001
Keep It Together
Photonic components such as multiplexers, carrier and pump lasers, and attenuators are designed to fit within a network and survive up to 20 years. Companies incur heavy costs when they replace components that have failed in the field. These...
Photonics Spectra, June 2001
Monitoring the Process
To meet the goal of an efficient laser-driven manufacturing process, the laser must deliver the correct amount of energy, correctly distributed over the target area. Users demand both predictable and repeatable operation results to ensure that the...
Photonics Spectra, June 2001
Photonics News Flash
The flashes lasted too long to be gunfire. And the videotapes that the public saw on the evening news were copies that had been altered by an unidentified technician in some TV studio who probably added the sound of gunshots to make the broadcasts...
Photonics Spectra, June 2001
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