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(38,336 articles)
Popular News
Photonic Crystal Improves IR Sensor Performance
Jun 1, 2006 — Scientists at the University of New Mexico in Albuquerque and at California Institute of Technology in Pasadena have reported that the addition of a two-dimensional hexagonal photonic crystal to a quantum dots-in-a-well infrared photodetector improves its performance by more than an order of magnitude. They note that the method should be suitable for use with a variety of IR sensors with applications in reconnaissance and rescue, medical diagnostics and firefighting. Sanjay Krishna, an...
Noise Links Digital Images to Camera
Jun 1, 2006 — Digital forensics has taken a step forward, thanks to a technique developed at State University of New York at Binghamton. A group of researchers led by Jessica Fridrich, associate professor in the department of electrical and computer engineering,...
Fluorescence Helps Measure Reactive Oxygen Species in Cigarette Smoke
Jun 1, 2006 — The main hazard of smoking cigarettes is that it has been linked to major diseases: cancer, cardiovascular disease, emphysema and stroke among them. The connection between smoking and these diseases is oxidative stress, a condition in which lipids,...
Spotting Live Bugs Keeps a Cleanroom Clean
Jun 1, 2006 — When it comes to keeping pharmaceutical cleanrooms clean and profitable, it is important to be a good judge of the quick and the dead. Of the two classes of particles that contaminate cleanrooms, the quick are the more troublesome because a single...
Photonic Quasicrystals Studied Experimentally
Jun 1, 2006 — Scientists in Israel and in the US have experimentally investigated the optical properties of nonlinear photonic quasicrystals, two-dimensional structures with long-range order but no periodicity. The results may offer insights into various...
Ceramic Nd:YAG Laser Generates 144 W
Jun 1, 2006 — Ceramic laser materials may enable the development of significantly less expensive lasers because the noncrystalline hosts can be fabricated much more quickly and simply than traditional crystalline laser materials. Moreover, because a ceramic laser...
Short Photonic Crystal Fiber Shows Promise for High-Peak-Power Pulse Generation
Jun 1, 2006 — Photonic crystal fiber enables designers to avoid several of the problems inherent with conventional fiber. In particular, the chief limitation on the power achievable with fiber lasers involves nonlinear effects whose onset scales with the product...
Compact Solid-State Source Is Tunable from Green to Red
Jun 1, 2006 — Tunable femtosecond pulses in the visible spectral region are valuable in numerous applications, including spectroscopy, frequency metrology and confocal microscopy, but the lasers that produce these pulses tend to be bulky, temperamental and...
Compact Solid-State Laser Generates 4.6 W at 457 nm
Jun 1, 2006 — A major stumbling block on the way to laser displays is the lack of a compact, efficient blue source. Compact blue lasers also are valuable for medical diagnostics and optical storage and in the military for underwater communication. Recently,...
Innovative Technology Enables a New Architecture for the World’s Largest Laser
Jun 1, 2006 — The world’s largest laser, the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory in Livermore, Calif., is 85 percent complete (Figure 1). When operational, its 192 ultraviolet beams will converge on a target filled with...
Channeling Surface Plasmons
Jun 1, 2006 — Modern communications systems must deal with huge amounts of data at ever-increasing speeds. In doing so, they try to use the best features of electronic and optical circuits. Electronic circuits are tiny, but their operation speed is limited....
A New Look at Risley Prisms
Jun 1, 2006 — With more and more applications requiring laser beams to be aimed at distant targets, such as for line-of-sight communications, aircraft-to-satellite secure communications, and laser weapons and countermeasures, there are increasing demands for...
Lasers Emerge as a Tool for the Direct Study of Electrons in Solids
Jun 1, 2006 — Angle-resolved photoemission spectroscopy is the most direct way to observe the quantum-mechanical structure of electrons in solids and one of the key tools used to understand the complex electronic interactions that lead to high-temperature...
Photonics Set to Rescue Microprocessor Clocking
Jun 1, 2006 — In the fast-paced and ever-changing microprocessor world, there is one undeniable truth: Photonic clocking will happen. It is just a question of when. The International Technology Roadmap for Semiconductors, which has been accurate in laying out...
The Best of Both Worlds for Spectroscopy
Jun 1, 2006 — Spectroscopists continue to push the boundaries of technology as they seek to learn more about life’s building blocks. From understanding how the human body works in minute detail to discovering and analyzing new planets, the limits of current...
SPECTRAL LIBRARIES
Jun 1, 2006 — Thermo Electron Corp. has introduced a catalog featuring collections of FTIR and Raman spectral libraries that are designed to work with its instruments and software. Useful to scientists analyzing unknown samples, the resource details collections...
OPTICAL FILTERS
Jun 1, 2006 — The updated Web site of Omega Optical features new graphics, including images of its filters and galleries of images provided by life sciences collaborators. Among the improvements, customers can search for products by either application or filter...
SURFACE MEASUREMENT
Jun 1, 2006 — Datasheet DM006, titled “Measuring Diamond Turned Aspheric and Diffractive Surfaces,” has been released by Precision-Optical Engineering. Downloadable from the company Web site, the publication describes contact measurement systems, including the...
FO TESTING
Jun 1, 2006 — A Web site for those who are involved in the manufacture, demonstration, installation, evaluation, alignment, optimization and certification of optical-fiber-based communications systems has been launched by M2 Optics Inc. The portal presents the...
LASER MARKING
Jun 1, 2006 — DataLase Ltd., formerly known as Sherwood Technology, has produced a brochure on its full range of products using the DataLase color change process. Titled “Revolutionary Techniques for Marking Products & Protecting Brands,” the publication is...
BEAM MEASUREMENT
Jun 1, 2006 — Gentec Electro-Optics Inc. has unveiled the 84-page “Laser Beam Measurement Product Guide,” which showcases its devices for laser power and energy measurement. Downloadable from the company Web site, the publication details the Solo PE handheld...
FIBER TESTING
Jun 1, 2006 — A manufacturer of adaptive optics, AgilOptics has released a folder of leaflets on its Clarifi and ClariFast closed-loop adaptive optics systems, Unifi deformable mirror system, Simpli self-contained deformable mirrors, Mini-Cass telescope beam...
DEFORMABLE MIRRORS
Jun 1, 2006 — A trifold brochure from OptoTest Corp. provides information on the company’s products for testing fiber optics. The full-color publication details the OP1021 launch condition analyzer system, the OP1100 discontinuity analyzer, the OP930 return loss...
FO SWITCHES
Jun 1, 2006 — The trifold “Product Catalog” from AC Photonics Inc. details the company’s MS series fiber optic switches, which connect optical channels by redirecting an incoming optical signal into a selected output fiber. Performance specifications are provided...
OPTICAL SYSTEMS
Jun 1, 2006 — Optical Insights, a designer, developer and manufacturer of optical systems for spectral and polarization imaging applications has launched a Web site geared toward researchers and OEMs. The portal details the company’s products and technologies,...
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