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Intense Imaging
The incorporation of image intensifiers into high-performance charge-coupled device (CCD) cameras has produced intensified imaging systems that provide high sensitivity in low-light conditions and allow temporal resolution of extremely short phenomena. These imaging systems are widely used for state-of-the-art applications such as laser-induced fluorescence, laser-induced breakdown spectroscopy, combustion research, plasma studies, nondestructive testing and single-molecule fluorescence...
Photonics Spectra, March 2001
Photonics Switches: Fast, but Functional?
The continuing success of wavelength division multiplexing (WDM) seems to have put to rest any concerns about the accessibility of bandwidth, even in the face of the Internet’s exponential growth. However, while it has lent some control over...
Photonics Spectra, March 2001
Staff Report: Photonics Advance the Science of Art
How do you safely remove years of coal soot and diesel exhaust from the Parthenon? Or strip discolored varnish off a painting by a Dutch master? Artworks must be cleaned periodically to allow visitors to view them the way their creators intended --...
Photonics Spectra, March 2001
The 2000 Photonics Awards Reception
The 2000 Photonics Awards ceremony and reception, held Jan. 22 in the Regent Club at the Fairmont Hotel in San Jose, Calif., hosted nearly 200 executives and scientists. This annual event applauded one individual and 25 companies that were chosen...
Photonics Spectra, March 2001
The Infrared System
The literature abounds with equations and data that pertain to infrared system design.1 Comparatively little has been written about the process of the design, however. Infrared system design is not a synthetic process, as is some circuit design. You...
Photonics Spectra, March 2001
Where’s the Beam?
Research and commercial laser-based systems need to align the laser beam to an optical axis. In the laboratory, operational flexibility is key because setups are modified and reconfigured routinely. In commercial products, the critical aspects are...
Photonics Spectra, March 2001
Ball vs. Gradient Index Lenses
In modern communications systems, micro-optic components couple light between fibers, from laser diodes to fibers and from fibers to detectors. They also collimate light from fibers i thin-film multiplexing. Both ball lenses and gradient index of...
Photonics Spectra, February 2001
Clever Cameras Do More Than See
A picture may be worth a thousand words, but sometimes what’s needed are just a few: good, bad, accept, reject. In manufacturing, product assessment is often based on visual data. A human then processes that data many times to form a quality...
Photonics Spectra, February 2001
Fast Coatings for DWDM Filters
Current and forecast market requirements for dense wavelength division multiplexing (DWDM) filters are driving the need for ever-increasing production throughput. Manufacturers are calling for larger substrate diameters, enhanced uniformity and...
Photonics Spectra, February 2001
Have You Hugged Your Fiber Today?
The information explosion ignited by the Internet has created an insatiable appetite for bandwidth. To appease the bandwidth hunger, most telecommunications operators are pushed to increase the per-channel data rate of wavelength division...
Photonics Spectra, February 2001
Staff Report
Cameras, lasers and instrumentation help law-enforcement officers track down evidence and people in criminal investigations. Patrick Baxter, serving time in New York for car theft, was indicted last November on charges in three murder cases, one of...
Photonics Spectra, February 2001
The Big Trade-Off
Semiconductor lasers are very small (about the size of a grain of salt), very efficient electrically powered sources of coherent light. In the mid-1980s, their availability in large quantities and with long lifetimes enabled several applications,...
Photonics Spectra, February 2001
Untangling the Wavelength Web
The growth of the Internet is fundamentally reshaping communications and proving that too much bandwidth is not enough. According to communications research firm RHK Inc. of South San Francisco, the explosive growth of Internet Protocol traffic...
Photonics Spectra, February 2001
Imaging/Detectors
We’ve grown accustomed to seeing cameras on laptop computers, Sharper Image gizmos and Radio Shack toys. Infrared waves surround us, turning on televisions and stereo equipment and transmitting data between our various computing devices....
Photonics Spectra, January 2001
Instrumentation & Accessories
It shouldn’t surprise anyone that communications applications are molding the future of photonics instrumentation and accessories. The good news for those in other application areas is that the change should be good for everyone. We said last...
Photonics Spectra, January 2001
Lasers: Making Photons
The front lines for the laser wars have traditionally been the research laboratories, where scientists and engineers have developed new generations of technical solutions for traditional scientific and industrial customers. The new battles, however,...
Photonics Spectra, January 2001
Optics/Fiber Optics: Controlling Photons
These days, it seems as if there are two kinds of optics companies: those that are making communications components and those that want to make communications components. And noncommunications customers are crying: "What about us?" Communications...
Photonics Spectra, January 2001
Photonics Design and Solutions: Digital Imager
In today’s highly competitive market, it is vital to bring products from concept to production as rapidly as possible. As soon as a design is in production, it is essential to continually monitor performance, acquiring and interpreting data...
Photonics Spectra, January 2001
Lasers Drive Electronics to the Cutting Edge
Lasers are no longer strangers to electronics manufacturing. But the demand for smaller components and higher throughput calls for instruments with more power, faster pulse rates and shorter wavelengths. What started as a niche has become a...
Photonics Spectra, December 2000
Machine Vision Illuminates the Future of Electronics
Put simply, machine vision’s primary task is to distinguish features of interest from their background. But things are not so simple in the electronics industry, where the features of interest continue to shrink against backgrounds that often...
Photonics Spectra, December 2000
Optical Lithography Aims for 157 nm
Reducing the design rules of seminconductor devices enables smaller components and represents the most economical means for the industry to reduce costs while improving device performance. This economic driver is at the root of each advancement in...
Photonics Spectra, December 2000
Semiconductor Metrology: Will Photonics Measure Up?
The semiconductor industry’s progress toward new materials and fabrication methods is creating opportunities for effective, fast and nondestructive photonic metrology techniques. This applies along the entire chain of production, from wafer...
Photonics Spectra, December 2000
Adaptable, Efficient Lasers Expand Their Role in Microfabrication
Cell phones, computers, stents, microsatellites, smart cards, ID tags -- there’s no escape from products incorporating miniature components. Consumers are expected to spend billions of dollars for such devices over the next few years. Debate...
Photonics Spectra, November 2000
Damage Control:
Thanks to modern manufacturing practices, thin-film coatings for high-power laser systems can withstand high fluences before experiencing catastrophic damage. Yet laser fluence all too often damages optics in real-world applications. End users often...
Photonics Spectra, November 2000
Photonics Defies the Depths
We’re aboard the Ningaloo Blue, two miles out in the Indian Ocean, about to swim with the world’s largest known sharks. Nine years earlier, an amateur biologist discovered that the extremely rare and elusive whale shark regularly comes...
Photonics Spectra, November 2000
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