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Photonics Pointers
You are designing a product that incorporates a high-power laser diode. Do you need a custom design? What are the costs and technical issues involved in customizing diodes? Where do you start? Product designers can make the process faster, perhaps less costly and certainly less painful by understanding how to work with laser diode manufacturers. Here are some technology tips for specifying custom high-power laser diodes, and a basic reality check of the process of developing custom solutions…
Photonics Spectra, June 2001
Technology Close-Up
Color is a visual cue that we often use to make judgments about our surroundings: Is an apple ripe? A steak fresh? Does this jacket match those pants? For this reason, manufacturers go to a lot of trouble to ensure that a package's colors remain...
Photonics Spectra, June 2001
The Automation Crisis
Physics is all that stands between Intel and photonics. Intel knows volume manufacturing, it knows how to integrate many functions on one chip, and it knows that communications is a significant growth market. So why didn’t the massive chip...
Photonics Spectra, June 2001
'Wireless' Meets Photonics
Optical communication offers considerable growth potential to the continuously increasing useful transmitted data rate demand. Constellations of communications satellites will benefit from the ability to transmit the ever-higher data rates with...
Photonics Spectra, May 2001
A Little Enlightenment
When automated inspection became a viable process, engineers concentrated on the camera and optics, the algorithms, the interface hardware and the processor. Only rarely did they pay attention to the lighting system or lighting approach. As...
Photonics Spectra, May 2001
Chameleon Lasers
Cell biologists have long used wavelength discrimination to optically map structure and function at the cellular and subcellular level. The advent of the confocal laser scanning microscope has enabled such observations in three dimensions, close to...
Photonics Spectra, May 2001
Efficiency Experts
For almost a decade, the laser industry has labored to produce a compact, reliable semiconductor-based laser that emits a blue beam. It is a tale replete with exotic design schemes, from upconversion fiber lasers to waveguide or resonantly doubled...
Photonics Spectra, May 2001
Future-Proofing Defense
The new political administration wants to transform America's defense structure from a Cold War fighting force into a high-tech, futuristic military. But deciding which weapons programs will receive a boost in funding and which a cut – and then...
Photonics Spectra, May 2001
Keeping Up with the LEDs
Light-emitting diodes (LEDs) appear to be everywhere these days. They are used in internal and external automotive lighting applications, traffic lights and some information display systems. But these LEDs are really quasimonochromatic light sources...
Photonics Spectra, May 2001
Laboratories Turn to Photonics
In last year's look at the laboratory market, bench scientists emphasized the need for greater sensitivity, power and throughput, to the exclusion of such trifling considerations as price. To some degree, and for certain applications, this...
Photonics Spectra, May 2001
Light Technology, Heavy Manufacturing
At KLA-Tencor Corp. of San Jose, Calif., the emphasis is on the detection and measurement of small things, items with dimensions of less than a micron. The company makes yield management and process control solutions for the semiconductor...
Photonics Spectra, May 2001
That's Entertainment
The recent establishment of the Purdue International Center for Entertainment Technology at Purdue University in West Lafayette, Ind., is a formal acknowledgment of entertainment as a vibrant innovation sector. The center will bring researchers and...
Photonics Spectra, May 2001
Tools to Beat the Bandwidth
The demand for more bandwidth has undergone something analogous to chromatic dispersion: Its original message has changed shape over time. Perhaps because of the simplified format of marketing and media or the bottom-line mentality of...
Photonics Spectra, May 2001
UV Laser Safely Cleans Historical Glass
Historical glass can suffer a tremendous loss of transparency from atmospheric or biogenic corrosion resulting from long-term exposure to air pollutants and humidity (Figure 1). Surface layers and deposits can present serious obstacles to efforts to...
Photonics Spectra, May 2001
What Color Is My LED?
Just about everyone is familiar with light-emitting diodes (LEDs) from their use as indicator lights and numeric displays on consumer electronic devices. Beyond that, low light output and lack of color options have limited the application of LED...
Photonics Spectra, May 2001
Will Photonics Find Its Place in Medicine?
New medical applications for lasers and imaging seem to be around every corner, but this does not mean that doctors will invest in new systems. To incorporate lasers into their practices, doctors must find that they are both useful and...
Photonics Spectra, May 2001
Hands on the Wheel, Cameras on the Road
When General Motors introduced the night-vision option in its 2000 DeVille, it selected the "Cadillac" of infrared technology, a ferroelectric focal plane array. Not far removed from the thermal imagers used in the Gulf War, the 320 x 240-pixel...
Photonics Spectra, April 2001
Optical Fiber Soliton Communication
Under certain circumstances, a single pulse of self-maintaining shape, called a solitary wave, can exist in a dispersive, nonlinear medium. This well-established fact is mostly remarkable for the historical curiosity that 140 years elapsed between...
Photonics Spectra, April 2001
Optics that Fit
The optical dome conventionally used on the front end of a missile is a section of a sphere, because spherical optical design and fabrication are well-understood. Such blunt forms, however, produce considerable aerodynamic drag. Replacing a...
Photonics Spectra, April 2001
Staff Report: Jobs in Photonics
Layoffs and Wall Street notwithstanding, photonics is booming -- and so is the job market. It’s hard to ignore what appears to be contrary evidence. From October to March, our Photonics Market Index fell 21.5 percent, and major photonics...
Photonics Spectra, April 2001
Staff Report: Whence the Technicians?
Last June, the Coalition for Photonics and Optics sent a sobering shot across the bow of the US optics industry. Representatives from academe, photonics companies and optics-related associations told the gathering on Capitol Hill that "science and...
Photonics Spectra, April 2001
Technology Close-Up: Optical Fiber Soliton Communication
Under certain circumstances, a single pulse of self-maintaining shape, called a solitary wave, can exist in a dispersive, nonlinear medium. This well-established fact is mostly remarkable for the historical curiosity that 140 years elapsed between...
Photonics Spectra, April 2001
Transparent Airplanes?
Many advanced optical and infrared materials inspection techniques that have been employed to examine aircraft structures have a long history of laboratory development before adaptation for field use. Demonstrations on model laboratory materials...
Photonics Spectra, April 2001
All the Right Moves
The insatiable market demand for photonic telecom components is putting a strain on manufacturers, who are looking for ways to maximize product yield and throughput. One typical production bottleneck is optical alignment and optimization time, which...
Photonics Spectra, March 2001
Deck-Plate Science: A Day in the Life at Omega
Three days a week, the staff at the University of Rochester’s Laboratory for Laser Energetics in Rochester, N.Y., punches in at 4 a.m. to prepare the Omega laser for its three test shots. At 8 a.m., the operators from the instrument’s...
Photonics Spectra, March 2001
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