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Photonics Spectra - February 1999
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Issue Library
Features
Laser Chillers:
Some like it hot. Even some lasers don't mind the heat as much as others. But the laser user that disregards thermal management altogether is asking for trouble. Laser users might not put a whole lot...
Beam Correction in Laser Diodes:
Laser diodes are now widely used in industrial, computer, communications and consumer products. These tiny semiconductor lasers have all but replaced the HeNe laser in many applications in the...
Wavelength Lockers Keep Lasers in Line
Dense wavelength division multiplexing (WDM) transmission systems have taken on a level of sophistication never before seen in the telecom industry. Wavelength spacings of 100 GHz (0.8 nm) and 50 GHz...
Image Sensors:
Many scientific, medical and industrial imaging applications rely on camera systems that contain high-performance charge-coupled device sensors (CCDs). These applications require sensors that provide...
Speed Demons: Is 'Faster' Better and Cheaper?
If you need to produce X amount of work, you have two options: Hire a roomful of average workers to do pieces of the work, or hire a few fast, efficient people to do the same work. The fast workers...
Telecommunication Systems Minimize Laser Risks
The rapid development and implementation of optical telecommunication technology have significantly aided the growth of Information Technology in the 1990s. Ready access to the Internet and the...
Tech Pulse
Sensor Detects Red Algae Growth
What do Hong Kong and Corpus Christi, Texas, have in common? They've both been hit by algae red tides in the last two years. The mysterious bloom of toxic algae pops up in oceans around the world, threatening public health and wreaking economic havoc. Traditionally there has been little warning, but a company far from any ocean is developing a detector to remedy this. To detect toxic algae,...
New Coatings Break Reflectivity Barriers
Researchers at the Massachusetts Institute of Technology have discovered a class of dielectric coatings that can reflect a broad wavelength regime over a wide angular range. Professor John D....
Synthetic Gemstone May Hold Key to Photonic Crystals
Researchers at AlliedSignal Inc. in Morristown, N.J., have found a new use for synthetic opals. In experiments, the researchers introduced carbon into the faux gemstone's lattice. Then they...
Universe May Hold Diamond Concentrations
Our galaxy may contain high concentrations of tiny diamonds in carbon-rich planetary nebulae. That's the finding of a group of researchers from the Institut d'Astrophysique Spatiale in Paris. The...
Diode Laser Turns up the Power in the Mid-IR
Research at Northwestern University has introduced new options for semiconductor lasers operating in the mid- infrared range. Led by professor Manijeh Razeghi, scientists at the university's Center...
Disordered Films, Powders Exhibit Lasing Capabilities
Semiconductor lasers may be brighter than light-emitting diodes (LEDs), but that advantage certainly comes at a premium. Now researchers at Northwestern University have demonstrated lasing in highly...
Laser Pulses 'Freeze' Energy Flow
Scientists at the University of Illinois in Urbana-Champaign may have discovered a way to control chemical reactions using the pulse of a laser, an accomplishment that has eluded researchers for...
Gauging Semiconductor Temperature
As any good cook knows, a recipe's cooking temperature is critical. For physicists constructing novel semiconductors, knowing the temperature has been a problem. But thanks to a new light-based...
Kodak Imaging Sensors Make Second Trip to Mars
On the much-publicized Mars Pathfinder mission, Eastman Kodak Co.'s digital imaging technology played an essential role in surveying the landscape of the distant planet. In December, the company's...
Solid-State Laser Achieves 22 W of Average Output
Researchers at Lambda Physik Inc. in Fort Lauderdale, Fla., wanted to design a pulsed Nd:YAG laser system with a high-quality beam, enabling high-efficiency frequency conversion. Recently, they...
Laser Lumpectomy Leaves No Scars
A new non-invasive technique combining interactive magnetic resonance imaging (MRI) and fiber optic laser delivery has shown promise in locating and ablating cancerous breast tumors. Researchers at...
Altimeter Maps Mars' North Pole
The Mars Orbiter Laser Altimeter payload on the Global Surveyor spacecraft has generated the first comprehensive three-dimensional map of the martian north pole. The altimeter's 50-cm-diameter...
Method Measures Heat of Thin-Film Semiconductors
With their complexity and materials changing, integrated circuits are generating more heat, creating a greater need to monitor that heat to improve efficiency and reliability. Researchers are...
Scientists Uncover Mysteries of Hydrogen Using Nova
Scientists have wondered why Saturn appears younger than the rest of the planets in the solar system. Now they may be closer to understanding the structure and evolution of far-off planets, thanks to...
Team Builds More Efficient Quantum Cascade Laser
From chemical spectroscopy to free-space optical communications, a growing number of applications can benefit from lasers emitting in the IR between 8 and 12 µm. In recent years, many have...
Two Associations Recognize Raman's Discovery
One of the most popular methods for detecting illegal drugs and unknown substances is Raman spectroscopy. The technique takes advantage of the Raman effect, named after C.V. Raman of Calcutta, India,...
Chemical Sensor Offers Sensitive Real-Time Solution
A sensor developed at the Georgia Tech Research Institute could make detection of chemical contaminants highly portable and sensitive, and also enable in situ monitoring of a range of chemicals. It...
Space Shuttle Launch Recorded Digitally
For the first time, NASA has recorded and transmitted a space shuttle launch digitally, according to a release from Force Inc., the company that provided the space agency with its digital video...
Undersea Telescope Detects Neutrinos
Collaborators will soon deploy an underwater telescope to detect and study high-energy cosmic neutrinos. Placed on the ocean floor 2.35 km below the surface, the telescope may eventually unlock...
Artificial Tongue Relies on CCD
A team of researchers from the University of Texas at Austin has developed a device that mimics the function of the human tongue. The electronic device contains a 3 x 3 array of polyethylene...
Laser-Based System Sees Through Walls
Anyone who has read the comics knows about Superman's powers, from leaping tall buildings in a single bound to peering through walls with x-ray vision. But seeing through walls may no longer be the...
light speed
Acquisition Causes IR Imaging Market Shift
Flir Systems Inc. has struck again, this time putting together a deal to acquire Inframetrics Inc., a commercial imaging systems manufacturer in Billerica, Mass., with 1997 sales of $53.5 million....
Industrial Laser Shipments off '97 Mark for Third Quarter
The economic crisis in Asia and a volatile world economy were two factors that contributed to slumping shipments of industrial laser systems by North American companies in the third quarter of 1998....
Image Intensifier Market to Grow 7.6 Percent
The total world market for image intensifier-type night-vision devices was $378.4 million for 1998, according to a recent report released by Frost & Sullivan in Mountain View, Calif. The company...
Europeans Try Internet Access over Power Lines
Ten European utilities in Sweden, Germany, The Netherlands, Italy and England have begun testing the feasibility of delivering high-speed, residential Internet access over power lines. If tests prove...
980-nm Laser Diodes to Power Transoceanic Telecommunications
Submarine system developers are racing to deploy networks that perform at maximum power and reliability. To meet those somewhat inversely related needs, industry leaders have worked to qualify 980-nm...
Lemelson Foundation Seeks to Dismiss or Transfer Cognex Suit
The Lemelson Medical, Education and Research Foundation LP filed a motion in December in US District Court in Massachusetts to dismiss the suit brought against it by the Cognex Corp. of Natick, Mass....
Optical Add/Drop Multiplexing Expected to Reach $7.2 Billion in 2008
The world market for optical add/drop multiplexing reached $23 million in 1998, reflecting the initial stage of introduction and production, according to a report issued by ElectroniCast Corp. of San...
Census Bureau Revises Method of Counting Lasers
For the first time, the US Census Bureau has an accurate way of counting lasers. Until now, the bureau categorized lasers with numerous unrelated electronic devices. At the urging of several groups,...
Thermo Instrument Offers to Buy Control of Spectra-Physics AB
The 1999 photonics acquisition season opened early and loomed large, as Thermo Instrument Systems Inc. of Waltham, Mass., made a $355 million offer to take over Spectra-Physics AB, the Swedish...
Machine Vision Markets to Grow Unevenly
The American machine vision systems market can expect compound annual growth of 13.6 percent in the next five years, with revenues more than doubling from $798 million in 1997 to $1.9 billion in...
Accent on Applications
Laser Pointer Introduces Holography for the Masses
Copernicus, Galileo, Columbus: All used the scientific method to set the popular wisdom of their day on its head. In this same tradition, Stephen Michael of Three Dimensional Imagery has disproved the belief that a good hologram cannot be created with a battery-operated laser pointer. And he did it with one purchased from the Edmund Scientific Co. 1998 Optical Instruments Catalogue. A...
CO2 Laser Gives Edge to Tube-Cutting Robot
Motoman Inc., a manufacturer of robotic solutions for industrial applications, designed its new TubeStar robot to produce high output of cut metal tubing at low operating costs. This sort of...
Imaging System Keeps Nasal Sprays up to Snuff
The US Food and Drug Administration (FDA) requires manufacturers of nasal sprays to demonstrate not only the effectiveness of their product in easing congestion, but also the consistency and...
Presstime Bulletin
South Pole Researchers Witness Atmospheric Halos
Mother Nature put on her own light show at the South Pole last month when atmospheric halos appeared before researchers, construction workers and a visiting TV crew. The halos were caused by the reflection and refraction of sunlight by ice crystals in the atmosphere. Within about 30 minutes the witnesses observed at least 24 halos overhead. An expert at the South Pole station, operated by the...
Corning Files Suit Against Fibercore Ltd.
Corning Inc. in Corning, N.Y., has filed suit against Fibercore Ltd. of Southampton, UK, claiming unfair competition and an infringement on two of its optical fiber patents. Corning is seeking an...
Lucent to Merge with Ascend Communications
Telecommunications giant Lucent Technologies Inc. in Murray Hill, N.J., has signed a definitive agreement to acquire Ascend Communications Inc. in a stock swap valued at close to $20 billion. The...
Nichia Delivers Blue-Violet Laser
Leading the pack in development of a blue laser, Japan's Nichia Chemical Industries Ltd. is delivering on its promise to commercialize blue-violet laser diodes, with shipments slated for the...
Uniphase Subsidiary Sold to KLA-Tencor Corp.
KLA-Tencor Corp., a supplier of semiconductor wafer inspection products, has purchased the Ultrapointe subsidiary of Uniphase Corp. Terms of the agreement were not disclosed. One of Ultrapointe's...
Products
ANGLED CLEAVER
Fiber Optic Center Inc. now has in stock the Oxford AFC-2008 angled fiber cleaver, which the company says requires no training and minimal skill for the single operation of the cleave. Each cleaver, used for 125-µm single-mode and phase- modulation fibers, has a scale for accurate cleave lengths. The multiposition diamond blade's typical angle is 8.3°, reducing backreflection as well as stress on...
Fiber Optic Center Inc.
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HEAD-MOUNTED DISPLAYS
Sony Electronics Inc. introduces four head-mounted devices with high-resolution LCDs. Two models offer 1.55 million pixels in SVGA resolution, a focal point of 4 ft and a simulated 30-in. picture in...
Sony Electronics Inc., Visual Imaging Products Group
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HIGH-SPEED IMAGING
Toshiba Imaging Systems' IK-7XD is a remote-head camera that allows the capture of video frames at full vertical resolution in a single shutter event. Utilizing progressive scanning technology, this...
CANON MEDICAL COMPONENTS U.S.A., Video Sensing Devices
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PHOTON COUNTING
The TimeHarp 100 PC board from PicoQuant is a fully integrated system for time-correlated single photon counting on a PC card. The circuit allows >2 million counts per second in continuous mode...
PicoQuant GmbH
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POLISHING ABRASIVES
Meller Optics Inc. is offering a line of high-purity calcined alumina polishing abrasives for grinding, lapping and polishing a variety of hard and semisoft optical substrates. The Microlux abrasives...
Meller Optics Inc.
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BEAM MAPPING
DataRay Inc. has introduced BeamM2 AP, a compact beam profiler with diagnostic capabilities. It features simultaneous measurement of M2 beam quality, focus position, beam-waist diameter and axial...
DataRay Inc.
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DIODE MODULES
The Flexpoint laser diode modules from Laser Components GmbH are offered in a wide range of sizes and types, designed to meet the requirements of a wide variety of applications, including noncontact...
Laser Components Germany GmbH
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DIODE LASER
Micro Laser Systems has produced a 10-mW HeNe replacement muon diode laser. It features a 1.5-mm circular beam with a Gaussian profile and low wavefront error. The company says its...
Micro Laser Systems Inc.
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GREEN YAGs
Roithner Lasertechnik has released green diode-pumped YAG laser modules with powers starting at 1 mW up to 50 mW continuous wave. They emit a bright green light at 532 nm and have a typical lifetime...
Roithner Lasertechnik GmbH
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INDUSTRIAL LASER
A high-performance five-axis laser that allows users to cut, weld and perform surface treatments with one setup is available from Trumpf Inc. The TLC 1005 can machine 2-D and 3-D parts and...
TRUMPF Inc., Laser Technology Center
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CO2 LASER OPTICS
Laser Research Optics offers a wide variety of replacement optics for CO2 lasers that it will ship from stock within 12 h. The optics feature ZnSe positive focusing lenses in planoconvex,...
Laser Research Optics
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UV LASER
The Avia 355-1500 UV laser from Coherent Inc. is designed for drilling the micro via holes that interconnect the layers of high-density printed circuit boards, multichip modules and chip-scale...
Coherent Inc.
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MINI UV LAMPS
Spectronics Corp. has introduced its Spectroline UV quartz pencil lamps with a rated life of 5000 h. The standard models, the 11SC-1 and 11SC-2, are low-pressure, mercury-vapor discharge lamps made...
Spectronics Corp., Spectroline
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REFLECTING/TRANSMITTING BEAMSPLITTER
Optometrics USA Inc. has introduced a 50/50 reflecting/transmitting beamsplitter that maintains a constant reflection-to-transmission ratio over the UV to IR region. It consists of a UV-grade...
Optometrics Corp.
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COMPACT STAGES
New Focus Inc. has unveiled pint-size versions of its Triple-Divide ball-bearing translation stages. Measuring 1.5 x 1.5 x 0.75 in., they are lockable modular devices that provide 1/2 in. of travel...
Newport - New Focus
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GLIDE STAGE
Prior Scientific Inc. says its new Glide stage allows easy and accurate positioning of specimens under optics. A suitable tool for stereomicroscope users, the stage may be moved or rotated in any...
Prior Scientific Inc.
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PULSE MEASUREMENT
Elliot Scientific Ltd. has introduced its Timewarp E-750 autocorrelator for pulse measurement of mode-locked Ti:sapphire lasers with pulse widths between 40 and 500 fs. It is designed to generate a...
Elliot Scientific Ltd.
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SPECTRORADIOMETER
Analytical Spectral Devices Inc. has introduced a portable, handheld version of its FieldSpec spectroradiometer. It weighs 2.7 lb, measures 3.3 x 6 x 8.2 in., runs on standard camcorder batteries and...
ASD Inc.
TEST EQUIPMENT
Anritsu Co. has unveiled an optical amplifier test system that has an optical spectrum analyzer, optical modulator and a PC-compatible controller to make noise-frequency and gain measurements of...
Anritsu Co.
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