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

Vulcan to Produce Petawatt Pulses
Jul 1, 2002 — The Nd:glass Vulcan laser at Rutherford Appleton Laboratory near Oxford, UK, was scheduled to produce its first petawatt-level laser pulse by June 30. At full operation, the near-IR laser is expected to produce about one 500-J, 500-fs pulse an hour, which should create pressures and temperatures similar to conditions found in stars. The initial research with the device is scheduled for November -- when it will be used to study electron acceleration -- after a six-week commissioning run to...
Colloids May Enable Integrated Photonic Circuits
Jun 1, 2002 — Thanks to researchers at the University of Toronto, photonic applications one day could run on groovy crystals. The crystals -- composed of colloidal spheres deposited on a grooved substrate -- could enable the creation of integrated photonic...
Crystals Promise New Optical Materials
Jun 1, 2002 — Colloidal particles interest scientists because, although the particles are much larger than molecules, they often behave similarly. For example, they can be present in a solid, liquid or vapor phase, and like molecules, their phase behavior is...
Fiber Optics Upgrades Cryptography
Jun 1, 2002 — An autocompensating quantum cryptography technique based upon manipulating a pulse of light split into equal orthogonally polarized components has received a significant upgrade with the integration of fiber optics into the coding/decoding...
Film Integration Steps Closer to Flat Panel Application
Jun 1, 2002 — Three-color integration of rare-earth-doped GaN thin films may now be possible for use in flat panel displays. Using a combination of shadow-masking and photoresist-liftoff techniques, Don Lee and Andrew Steckl, researchers at the University of...
Grooves Align Fiber and Crystal
Jun 1, 2002 — Researchers in upstate New York have developed a technique for attaching an optical fiber to a photonic crystal without using a tapered waveguide as an intermediary. The process incorporates stepped grooves in a silicon platform on which the...
Hydrogels Form Tunable Photonic Crystals
Jun 1, 2002 — Using thermoresponsive hydrogel nanoparticles, researchers at Georgia Institute of Technology in Atlanta have formed colloidal photonic crystals that are color tunable by temperature-controlled particle compression. The crystals are formed from a...
Imaging Combines Optical Modalities
Jun 1, 2002 — Optical coherence tomography (OCT) and its variant, optical Doppler tomography, have proved useful for the functional imaging of tissue physiology. However, if optical Doppler tomography is to be deployed in clinical settings, it must offer...
Ink-Jet Simplifies Organic LED Design
Jun 1, 2002 — Researchers at the University of Arizona in Tucson have developed an ink-jet printing method for constructing organic LEDs that does not require a special mask or prepatterning of a substrate's surface. A user designs a pattern on a computer,...
Laser Setup Challenges No-Cloning Rule
Jun 1, 2002 — The no-cloning rule, a consequence of quantum mechanics, states that no device can produce perfect copies of an unknown quantum mechanical sys-tem. Nevertheless, a system that fairly well copies any possible input state is possible in theory. Now, a...
Laser Ultrasound Evaluates Paper
Jun 1, 2002 — One of the biggest challenges for the paper-making industry is testing the strength and flexibility of paper during production. Engineers must resort to examining samples cut from the ends of completed rolls. Now, engineers from Lawrence Berkeley...
Metal Migration Leads to Breakdown of Organic LEDs
Jun 1, 2002 — Using secondary ion mass spectrometry, researchers at the Institute of Materials Research and Engineering in Singapore have found that some organic LEDs degrade because of metal migration at the indium-tin oxide/polymer interface. As reported in...
Microstructures Emit Coherent IR Radiation
Jun 1, 2002 — Thermal sources, such as a blackbody or the incandescent filament in a lightbulb, typically produce broadband, quasi-isotropic radiation. But a team at Centre National de la Recherche Scientifique in Châtenay-Malabry and Bagneux, France, and at...
Monomeric Thin-Film Layers Hold Polar Order
Jun 1, 2002 — Electro-optic modulators along fiber optic lines commonly use LiNbO3 or GaAs waveguides that are expensive and often limit bandwidth to 10 GHz. Using a hybrid covalent/ionic self-assembly process, researchers at Virginia Polytechnic Institute in...
Near-Field Microscope Manipulates Nanometer-Size Particles
Jun 1, 2002 — The use of optical fields to trap and manipulate particles is finding applications from atomic and nonlinear physics to biology. Most of the applications thus far, however, have involved particles no smaller than a micron in diameter. Now...
Optical Trap Produces Degenerate Fermi Gas
Jun 1, 2002 — A group of physicists at Duke University in Durham, N.C., has demonstrated an optical trap capable of creating an arbitrary spin-state degenerate Fermi gas. The work promises to offer researchers cold-gas analogs of high-temperature...
Photonics Probes Hydrogen Exchange
Jun 1, 2002 — Theorists at Durham University in the UK and experimentalists at Stanford University in California have joined forces to investigate the dynamics of the simplest and most studied of bimolecular reactions, the hydrogen-exchange reaction. In this...
Polarization Control Yields Ultrashort Raman Radiation Pulses
Jun 1, 2002 — In many experimental setups, stimulated Raman scattering is an attractive method for laser frequency conversion. However, when the conversion must be done in the femtosecond regime, Raman scattering becomes problematic because other nonlinear...
Sensor Could ID Complex Mixtures
Jun 1, 2002 — According to scientists at the US Department of Energy's Ames Laboratory in Ames, Iowa, back-detection geometry may provide the key to opening up in vivo biological applications for a fluorescence-based chemical sensor. Developed in collaboration...
Single-Chip LED Emits White Light
Jun 1, 2002 — Scientists in Taiwan have developed a white LED that promises to simplify the manufacture of these devices. Rather than optically stimulating a phosphor or mixing the outputs of two or three LEDs of different wavelengths to generate white light,...
VCSELs Pump Photonic Crystal Defect Lasers
Jun 1, 2002 — The potential for low-threshold pump power is one reason why photonic crystal de-fect lasers show promise for high-speed optical-interconnect applications. To validate just how low that threshold can go, scientists at the University of Southern...
VUV Laser Paves the Way for X-Ray Free-Electron Laser
Jun 1, 2002 — After successfully constructing a self-amplification spontaneous-emission, free-electron laser that performs well in the vacuum-UV wavelength band, researchers have set their sights on producing an x-ray free-electron laser with a minimal wavelength...
Water/Propanol Solvent Makes 'Green' Lasers
Jun 1, 2002 — The volatility, flammability and other environmental hazards posed by solvents used in dye lasers, such as methanol and ethanol, have hindered the lasers' use in industrial applications. The refractive properties and benign nature of water would...
Zia Delivers Quantum Dot Samples
Jun 1, 2002 — Zia Laser Inc., a start-up optics company founded a year ago by faculty and former students of the University of New Mexico's Center for High Technology Materials, produced its first round of sample quantum-dot 1550-nm tunable gain chips in...
CARS Limits Background Interference
May 1, 2002 — Coherent anti-Stokes Raman scattering (CARS) microscopy allows viewing of live biological samples -- without photoluminescent labeling or staining -- by using three laser beams to induce electromagnetic vibrational signals from a sample. However, it...

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