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Meadowlark Optics - Wave Plates 6/24 LB 2024
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Research & Technology News

Photonic Crystal Fiber Enables Optical Clock
Jan 1, 2002 — Atomic clocks are already the most accurate timepieces on the planet, but a new version promises accuracy 1000 times better than the current cesium-based ones. It employs a narrow optical transition in a single, laser-cooled, trapped 199Hg+ ion, and a photonic crystal fiber introduced in 1999 helped make it possible. Atomic clocks excite a narrow transition in a reference atom with an oscillator, such as a microwave oscillator in cesium clocks. When the oscillator's frequency matches the...
Photonic Crystal Lattice Controls Laser Polarization
Jan 1, 2002 — By applying a photonic crystal lattice and changing the shape of the unit cell structure, researchers in Japan have developed a surface-emitting laser that promises higher output powers and better control of the lasing modes than either...
Polarization Defines Nanowires
Jan 1, 2002 — Researchers at Martin Luther Universität Halle-Wittenberg and Fraunhofer Institute for Mechanics of Materials, both in Halle, Germany, have demonstrated a technique that may lead to novel photonic devices. Heinrich Graener, a professor of physics at...
Pulse Tracked Through Waveguide
Jan 1, 2002 — Conventionally, researchers study pulse propagation by coupling pulses into a medium and deducing what goes on inside from the radiation that is transmitted or reflected. Now a team from the University of Twente in Enchede, the Netherlands, has...
Setup Offers Entangled Pairs of 856-nm Photons
Jan 1, 2002 — As technological improvements enable the controlled manipulation of smaller elements, the prospects for quantum computing become more realistic. Now researchers have demonstrated a solid-state source of entangled photon pairs, a key component for...
Short Pulses Show Absolute Phase Results
Jan 1, 2002 — Absolute phase, the phase of a carrier with respect to the envelope of a pulse, theoretically has significant effects on intense, nonlinear laser-matter interactions, but proving that the effects actually occur has posed a problem because of...
Single Atom Probes Standing Wave
Jan 1, 2002 — A probe composed of a single calcium ion has produced one of the most precise measurements of the three-dimensional structure of a light-wave field. Researchers at Max Planck Institut in Garching, Germany, isolated the atom in a radio-frequency trap...
Violet LED Points the Way to VCSELs
Jan 1, 2002 — The III-nitrides have demonstrated their potential as solid-state sources of violet and near-UV light, but to fully realize their benefits for applications in printing, data storage and communications, it will be necessary to adapt them to...
'Guide Star' Enables Sodium Measurements
Dec 1, 2001 — Researchers at Imperial College in London are employing adaptive optics technology to measure sodium in the atmosphere with the 1-m Kapteyn Telescope at La Palma Observatory in the Canary Islands. The continuous-wave output of a 275-mW,...
AlGaN/GaN Deposited on Silicon
Dec 1, 2001 — Aixtron AG of Aachen, Germany, has announced that a research group has deposited III-V semiconductors on silicon wafers using the company's low-pressure metallorganic chemical vapor deposition system. The ability to deposit compound semiconductors...
Bolometer Array Suitable for 350-µm Astronomy
Dec 1, 2001 — Researchers at the Jet Propulsion Laboratory and California Institute of Technology in Pasadena, Lawrence Berkeley National Laboratory in Berkeley, Calif., University of Colorado in Boulder and Cardiff University in the UK have developed a micromesh...
Engineering Emmys Presented
Dec 1, 2001 — The National Academy of Television Arts and Sciences of New York recognized scientific accomplishments in the television industry at a ceremony Oct. 16, awarding 25 Emmys for Outstanding Achievement in Engineering Development. Photonics and related...
FTIR Spectroscopy Detects Biohazards
Dec 1, 2001 — With the recent anthrax attacks in the US, finding a means of detecting airborne biological agents from a safe distance has become all the more important. Fourier transform infrared (FTIR) spectroscopy may be a solution, suggests a new study. A...
Laser Spectroscopy Refines Antiparticle Measurement
Dec 1, 2001 — The existence of the antiproton was predicted in 1930 and confirmed experimentally in 1955. These particles, however, can be produced only in high-energy accelerators, and their short lifetime prevents a detailed examination. By studying how...
Lidar Demonstrates Feature Discrimination
Dec 1, 2001 — Scientists use remote-sensing techniques to characterize landform variation, to evaluate the health of vegetation and to measure the temperature of the oceans. But while in the visible to the infrared offers valuable information, the ambient light...
Light-Reactive Coating Cleans Surfaces
Dec 1, 2001 — If you shine ultraviolet light on a surface coated with titanium dioxide, a common white pigment in paint, it self-sterilizes and defogs. Until now, however, if you used visible light, only approximately 5 percent of which is in the UV region, it...
Machine Vision Has Eyes for Foul Fowl
Dec 1, 2001 — With the rising concern over cholesterol, the demand for chicken now outpaces the demand for beef in the American diet. Pressured to keep pace, the poultry industry automated many of its processing techniques by the late 1970s. Inspection, however,...
Mobile System Features Three Mass Spectrometry Techniques
Dec 1, 2001 — There are few chemical species that cannot be identified through one or another of mass spectrometry's myriad forms. However, chemists must select which spectrometric method best applies, based on the targeted species and the method of sample...
Multispectral Imaging Monitors Coral
Dec 1, 2001 — A study appearing in the Sept. 6 issue of Nature concludes that airborne multispectral imaging may be a powerful tool for monitoring the health of coral reefs. Researchers on the project from Newcastle upon Tyne University and Sheffield University,...
Nd:LuYLF Generates 4.5-ps Pulses
Dec 1, 2001 — Solid-state lasers based on Nd:LuLF offer a wider spectral emission than those based on Nd:YLF, making them suitable for ultrashort-pulse operation, but LuLF is a much more expensive crystal to produce. Researchers at Centro de Lasers e Aplicações...
Nd:YAG Produces 53-mJ Green Light
Dec 1, 2001 — It may not be easy being green, but researchers at Mitsubishi Electric Corp.'s Advanced Technology R&D Center based in Amagasaki, Japan, have made the most of it. They have produced 53 mJ from a diode-pumped, intracavity frequency-doubled Nd:YAG...
Optical Digital Signal Processor Boosts Speeds
Dec 1, 2001 — A new approach to signal processing promises to reduce bottlenecks in telecommunications networks. Lenslet Labs Ltd. of Ramat-Gan, Israel, has developed an optical digital signal processor that operates thousands of times faster than today's...
Optical System Enables 2-D Scanning
Dec 1, 2001 — In pursuit of new e-book technology, researchers have designed a novel optical system that scans in two dimensions. Although developed for a display in a portable document reader, the designers say that the lens system can be used for any...
Photoinduced Reflectivity Creates Near-Field Probes
Dec 1, 2001 — Transient-aperture probes generated with light promise high resolutions and near-video rates for near-field infrared microscopy. The technique, under development at the W.W. Hansen Experimental Physics Laboratory at Stanford University in Stanford,...
Plasma Displays 0.12% Conversion Efficiency
Dec 1, 2001 — Laser-induced plasmas have emerged as potential sources of soft x-rays and extreme-UV light for applications in spectroscopy, microscopy and lithography. Now researchers at Max Born Institute for Nonlinear Optics and Spectroscopy in Berlin and at...

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