Features | Photonics Spectra

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Features

The push to produce new military technologies that accomplish tasks better, faster and cheaper continues to create a dazzling set of options for military planners. Collaboration is increasingly the byword for new development, with defense planners and contractors exploring ways, such as the use of commercial technology and joint ventures, to cut costs and share risks in developing new systems. Photonics products form an important part of key subsystems for military applications in detection and...

Photonics Spectra, August 1998

Ophthalmology:

Because it is photonic, the human eye was naturally one of the earliest places for photonics technology to intersect with medicine. Even today, photonics fills much of an ophthalmologist's tool kit. Light has treated a variety of eye-related...

Photonics Spectra, August 1998

Photodynamic Therapy:

A relatively new technology called photodynamic therapy is revolutionizing the treatment of some types of cancer. In this treatment, a physician injects a patient with a photosensitive chemical. When activated by light, these chemicals combine with...

Photonics Spectra, August 1998

Photonics in Industry

Industrial applications of photonic systems are growing steadily as manufacturers realize the benefits of light-based technologies. Laser systems help to create products by cutting, drilling and welding materials; imaging and analysis systems work...

Photonics Spectra, August 1998

Photonics in Medicine

Photonics and medicine have been companions at least as long as doctors have used light to kill bacteria or treat psoriasis. Only recently has technology begun to catch up with physician's wish lists, however. Photonics technology now has eased into...

Photonics Spectra, August 1998

Process Industries:

The process chemical industry is a major market for analytical instruments. Both on- and off-line applications for batch analysis use process infrared systems, a broad category that includes instruments such as Fourier-transform infrared and...

Photonics Spectra, August 1998

Semiconductors:

Chipmakers are taking great pains to keep development moving at the pace of Moore's Law, which states that the number of transistors on a semiconductor chip doubles every 18 months. Keeping up, however, is bound to require major leaps in technology....

Photonics Spectra, August 1998

Telecommunications:

The future of telecommunications carries some fairly irrefutable requirements: it must be fast, it must cost less, and it must support an insatiable need for network capacity. Photonics components offer the most logical and easy way to achieve all...

Photonics Spectra, August 1998

High-Speed Cameras Improve Vehicle Performance and Safety

Ballistics and mining engineers have long used high-speed imaging to study how small changes affect the way explosives detonate. Industrial engineers use the cameras to slow down high-speed machines so they can study manufacturing problems....

Photonics Spectra, July 1998

Laser Alignment Improves Appearance, Safety, Efficiency

Long operating life, fuel efficiency, passenger safety and customer satisfaction - all important considerations in the transportation industry - rely heavily on precision alignment of body parts and operating components. In recent years, lasers and...

Photonics Spectra, July 1998

Reliable, Compact Ultrafast Lasers Escape the Lab

While several thousand femtosecond lasers can be found in research and development laboratories around the world, and hundreds of potential applications have been proposed, no ultrafast sources were used regularly in the industrial or medical world...

Photonics Spectra, July 1998

Software Integration Enables Fast, Precise Telescope Design

Astrophysicists have studied gamma ray bursts for more than 25 years, but they are no closer to understanding them or determining their sources. These unpredictable bursts of gamma-ray photons come from all directions and are among the greatest...

Photonics Spectra, July 1998

Target Acquisition:

The criteria that the military uses to develop its targeting and surveillance imagers may be useful to those who are developing other types of imaging systems, such as microscopes, machine vision systems, consumer digital cameras and surveillance...

Photonics Spectra, July 1998

Absorption Spectroscopy Technique Provides Extremely High Sensitivity

Several important areas of modern technology require fast, accurate and convenient measurement of trace species concentrations in gaseous environments. Examples include reactive plasma processing, pollutant monitoring and semiconductor...

Photonics Spectra, June 1998

Holographic Storage: A Viable Alternative for Space?

As space missions venture further into the depths of the universe n and further away from Earth n engineers are pressed to come up with data storage systems that will prove more capable and more reliable. While holographic storage hasnit been chosen...

Photonics Spectra, June 1998

Lessons from Space:

The development of space-based ultraviolet astronomy began with the missions of deep-space sonders like Voyager, which allowed preliminary determination of UV spectra of remote stars. However, these methods remained largely unexploited because of...

Photonics Spectra, June 1998

Optical Morphology:

For many people, optics are but one of the many components that make up a system. They understand the specifications the optics must meet but, many times, they do not know nor are they concerned about the broader performance characteristics of the...

Photonics Spectra, June 1998

Photonics Helps Space Designers Battle Costs

Space agencies around the world are looking for ways to do more with less. In the US, NASA has spent the past few years emphasizing smaller, faster, cheaper missions. Since taking over as the agencyis director in 1992, Daniel Goldin has pushed...

Photonics Spectra, June 1998

Solid-State Lasers Join the Space Race

In the 60s and 70s, scientists had carte blanche to develop space instruments. However, in todayis cost-conscious space programs, laser designers look towards Earth and improving commercial technologies to meet cost guidelines and accomplish mission...

Photonics Spectra, June 1998

Telescope Analysis Yields Down-to-Earth Benefits

Astronomers and astrophysicists studying the nature of celestial objects require clear, sharp images collected by astronomical telescopes. To accomplish this, the engineers who design and build these instruments must ensure that light from the...

Photonics Spectra, June 1998

Terrestrial IR Imaging Benefits from Aerospace Programs

Infrared imaging systems are exploding into virtually every corner of the industrial workplace. Improved resolution, thermal sensitivity, ruggedness and portability of imager components have expanded the use of imaging systems, and a good many of...

Photonics Spectra, June 1998

Blue Lasers Meet Tough Commercial Requirements

Light-emitting diodes (LEDs) and laser diodes with wavelengths below the red ( Gallium nitride and other III-V nitride-based semiconductors have a direct band gap that is suitable for blue light-emitting devices. The band gap energy of aluminum...

Photonics Spectra, May 1998

Detector Choices:

Whether they need to image faraway stars, microscopic organisms or bottles on an assembly line, users of imaging systems face many choices: What type of light will work best? How does color play a role? Where should I position the camera? In...

Photonics Spectra, May 1998

Fiber Amplifiers Make Steady Gains

Since the early demonstrations in 1987, optical amplifiers based on rare-earth-doped fibers have been widely recognized as key devices for achieving high-performance, high-capacity and long-distance transmission on optical fiber networks. The...

Photonics Spectra, May 1998

Laser Diodes:

In recent years, the demand for high-power laser diodes, bars and arrays has grown rapidly. Most of the applications for these near-infrared devices can significantly benefit from a combination of higher output power and longer lifetime. In...

Photonics Spectra, May 1998

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