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29 Results for 'Lasers'
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Technology
Testing the Strength of Soft Materials
Soft materials are everywhere. In many applications, valuable information about the strength of these materials enables more precise control in everything from cutting and processing soft foods to des...
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Melih Eriten, Corinne Henak | P220230US01
Technology
Terahertz Quantum Cascade Lasers
A terahertz quantum cascade laser device is provided comprising a substrate having a top substrate surface, a bottom substrate surface, and an exit facet extending between the top substrate surface an...
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Dan Botez, Christopher Sigler, Thomas Earles, Jeremy Kirch | P160253US01
Technology
Diode Laser Based High Spectral Resolution Lidar
Lidar is an acronym for Light Detection And Ranging. The technology may be used to measure distance by illuminating a target with a laser beam and performing analysis on the reflected laser beam light...
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Edwin Eloranta, Matthew Hayman, Scott Spuler, Bruce Morley | P150335US02
Technology
High Power, High Efficiency Quantum Cascade Lasers with Reduced Electron Leakage
Quantum cascade lasers (QCLs) are made of layered semiconductor materials. The structures’ cores are composed of tens of stages, each of which consists of three regions: an electron injector, an...
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Dan Botez, Jaecheol Shin | P100284US01
Technology
Single-Crystal Halide Perovskite Nanowires with Superior Performance
Semiconductor nanowire lasers are promising building blocks in state-of-the-art photonic and optoelectronic devices due to their advantageous properties – including ultracompact size, efficient wave...
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Song Jin, Yongping Fu, Fei Meng | P160053US01
Technology
Multi-Wavelength Mode-Locked Laser
Many laser applications require multiple, simultaneous laser beams, each with a specific wavelength. But using multiple lasers and associated optical components increases the cost and size of the syst...
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Scott Sanders | P07171US
Technology
More Efficient Semiconductor Lasers
Quantum cascade lasers (QCLs) are semiconductor lasers that provide light in the mid- and far-infrared wavelength ranges. They are designed so that the generated light is transverse-magnetic (TM) pola...
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Luke Mawst, Dan Botez, Thomas Earles, Jeremy Kirch, Christopher Sigler | P140047US01
Technology
Simplified Anisotropic Graphene Conductor Emits Terahertz Radiation
Terahertz (THz) electromagnetic radiation penetrates cloth, paper and partially into the skin without the damaging effects of X-rays. Portable electronic devices capable of generating this radiation w...
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Max Lagally, Francesca Cavallo, Richard Rojas-Delgado | P130002US01
Technology
More Efficient and Reliable High Power Quantum Cascade Lasers
Quantum cascade lasers (QCLs) are made of layered semiconductor materials and are suited for a variety of applications, ranging from environmental monitoring to explosives detection and missile-avoida...
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Dan Botez, Jaecheol Shin | P120315US01
Technology
Smoother Waveguides for More Efficient Nonlinear Frequency Conversion
For many applications – from remote sensing to laser displays – it is necessary to convert the frequency of light via nonlinear interaction in semiconductor materials. Waveguide devices accomplish...
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Dan Botez, Thomas Kuech, Luke Mawst, Steven Ruder | P120326US01
Technology
Steering and Tuning Lasers Formed by Nanoscale Microtubes
Microtubes are minute structures of layered metal that have shown wide promise in many fields. Beyond wireless sensing and drug delivery, they are poised to improve optical technologies. Fiber optic ...
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Robert Blick, Luke Mawst | P08124US01
Technology
New Method of Constructing a Quantum Cascade Laser with Improved Device Performance
One type of light-emitting semiconductor laser is the Quantum Cascade Laser (QCL). Extending QCLs to short emission wavelengths (i.e., less than 4.0μm) is challenging due to strain-relaxation consi...
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Luke Mawst, Thomas Kuech, Jeremy Kirch | P110156US01
Technology
Intersubband Semiconductor Lasers That Operate Reliably at Room Temperature and in the Mid-Infrared
Intersubband semiconductor lasers represent a new type of laser that emits photons when electrons within a quantum-well structure release their energy during transit from high- to low-energy states. A...
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Dan Botez, Ali Mirabedini, Dapeng Xu, Luke Mawst | P04199US
Technology
Semiconductor Lasers with Doping Gradients in Optical Confinement Areas to Increase Laser Efficiency
Current semiconductor lasers are 45 to 50 percent efficient. Lowering the voltage needed for lasing to occur could increase the electrical-to-optical power conversion efficiency significantly.
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Dan Botez | P03391US
Technology
High-Performance Quantum Well Lasers with Strained Quantum Wells and Dilute Nitride Barriers
Conventional 1300 nm lasers are based on the InGaAsP or InGaAlAs quantum well active material system on an InP substrate. However, these 1300 nm lasers experience poor lasing performance when operated...
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Luke Mawst, Jeng-Ya Yeh, Nelson Tansu | P05440US
Technology
High-Power Quantum Cascade Lasers for Single, In-Phase Mode Operation
UW–Madison researchers previously developed high-power quantum cascade lasers (QCLs) with active-photonic-crystal structures to provide improved high-power, narrow-beam laser sources that operat...
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Dan Botez, Jeremy Kirch | P110160US01
Technology
Nanoscale Electromagnetic Radiation Device Using Serpentine Conductor
Electromagnetic radiation may be generated by the acceleration or deceleration of charged particles such as electrons. Synchrotron radiation occurs when the trajectory of high-speed electrons is curve...
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Robert Blick, Max Lagally | P08031US02
Technology
High-Power Quantam-Cascade Lasers with Active Photonic Crystal Structure
Compact laser sources emitting in the mid- to long-wavelength infrared range (4 to 12 microns) currently are of great interest for spectroscopic applications in homeland security, laser photo-acoustic...
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Dan Botez, Luke Mawst | P09338US01
Technology
High Efficiency Intersubband Semiconductor Laser
Intersubband semiconductor lasers represent a new type of laser that emits photons when electrons within a quantum-well structure release their energy during transit from high- to low-energy states. A...
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Dan Botez, Dapeng Xu, Luke Mawst | P05375US
Technology
Intersubband Quantum Box Stack Lasers
Intersubband semiconductor lasers represent a new type of laser that emits photons when electrons within a quantum-well structure release their energy during transit from high- to low-energy states. O...
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Dan Botez | P06395US
Technology
High-Speed, Swept Frequency Spectroscopic System
Gas sensing is important in many industrial applications. In harsh environments like engines, laser absorption spectroscopy can be used to measure gases, provided careful attention is given to light c...
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Scott Sanders | P02233US
Technology
Type II Quantum Well Optoelectronic Devices That Exhibit High Performance in the Mid-Infrared Region
Lasers that operate in the mid-infrared (2 to 5 micron) wavelength region are needed for a variety of applications, including laser-based radar, free-space optical links, chemical and gas sensing syst...
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Luke Mawst, Jerry Meyer, Igor Vurgaftman, Nelson Tansu | P03350US
Technology
High Coherent Power, Two-Dimensional Surface-Emitting Semiconductor Diode Array Laser
A UW-Madison researcher previously described a high-power, single-mode, two-dimensional, semiconductor diode laser formed on a substrate with an anti-guided array of laterally spaced grating surface e...
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Dan Botez | P05334US
Technology
Modeless Wavelength-Agile Laser
Spectroscopic studies evaluate the response of a specimen to different colors of light. Lasers are normally used in spectroscopic studies; however, lasers typically operate in one or more cavity modes...
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Scott Sanders | P05034US
Technology
Super-Continuum Ultraviolet Light Source with Single Stage Laser Drive
Ultraviolet (UV) lamps are used as a source of white (multi-colored) UV light for many applications; however, these lamps are large and expensive, require a high voltage, generate a lot of heat and ma...
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Scott Sanders, Joachim Walewski | P05396US