Photonics Spectra: broadband This is the syndication feed for Photonics Spectra: broadband. https://www.photonics.com/Splash.aspx?Tag=broadband Thu, 28 Mar 2024 13:22:32 GMT Mon, 26 Feb 2024 07:00:00 GMT 1800 AEgIS Cools Positronium with Lasers, Enabling New Antimatter Studies
Researchers at CERN’s Antimatter Factory working on the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) have cooled positronium with laser light for the first time. According to the researchers, the achievement could mark the first step towards a matter-antimatter system that emits laser-like gamma-ray light.

AEgIS is one of several experiments at CERN’s Antimatter Factory producing and studying antihydrogen atoms with the goal of testing with high precision whether antimatter and matter fall to Earth in the same way.

The experiment, the researchers said, paves the way for a whole new set of antimatter studies, including the prospect to produce a gamma-ray laser that would allow researchers to...]]>
https://www.photonics.com/Articles/AEgIS_Cools_Positronium_with_Lasers_Enabling_New/p5/a69762 A69762 Mon, 26 Feb 2024 07:00:00 GMT
II-VI, Lumentum Partner with Infinera
“We are excited to partner with II-VI to introduce this revolutionary point-to-multipoint solution that is expected to help network operators realize unprecedented savings,” said Dave Welch, Infinera’s chief innovation officer. “We are experiencing growing interest from our customers in XR optics, and collaborating with a leader like II-VI underscores the value of this innovation and our...]]>
https://www.photonics.com/Articles/II-VI_Lumentum_Partner_with_Infinera/p5/a65570 A65570 Fri, 21 Feb 2020 16:37:10 GMT
EU Creates Faster High-Capacity Internet Networks via Photonics
EU Scientists are harnessing next-generation lasers to create light-speed broadband connections and to remove the data bottlenecks that could cause the internet to grind to a halt as demand increases.

The EU-funded researchers from nine countries (Italy, Spain, The Netherlands, Finland, Germany, Israel, France, Japan, and South Korea) and 14 different organizations, call themselves PASSION — Photonic technologies for progrAmmable transmission and switching modular systems based on Scalable Spectrum/space aggregation for future agIle high-capacity metrO Networks.

The researchers are using vertical-cavity surface-emitting laser (VCSEL) sources with photonic integrated circuits, optical switches, and semiconductor optical...]]>
https://www.photonics.com/Articles/EU_Creates_Faster_High-Capacity_Internet_Networks/p5/a63754 A63754 Fri, 03 Aug 2018 14:40:00 GMT
Cloaking Approach Manipulates Light as It Passes Through a Target
In a novel approach to invisibility cloaking, the frequency of light waves is manipulated as the light passes through a target object. Called a spectral invisibility cloak, the new device can completely hide objects under broadband illumination, allowing full-field broadband invisibility.

A broadband wave illuminates an object, which reflects green light in the shown example, making the object detectable by an observer monitoring the wave. A spectral invisibility cloak transforms the blocked color (green) into other colors of the wave's spectrum. The wave propagates unaltered through the object, without ‘seeing its color,’ and the cloak subsequently reverses the previous transformation, making the object invisible to the...]]>
https://www.photonics.com/Articles/Cloaking_Approach_Manipulates_Light_as_It_Passes/p5/a63630 A63630 Thu, 05 Jul 2018 15:19:44 GMT
Stealth Sheet Conceals Hot Objects from IR
An ultrathin cloaking material has been developed that can hide hot objects, such as human bodies and military vehicles, from IR cameras. The new “stealth sheet” is <1 m thick and absorbs approximately 94 percent of the IR light it encounters, making hot objects beneath the cloaking material almost completely invisible to IR detectors.

To make the stealth material capable of absorbing light in the MIR and LWIR range — the wavelengths emitted by objects that are the approximate temperature of a human body — researchers from the University of Wisconsin-Madison integrated and transferred metallic-dielectric nanostructures and microscale IR emitters onto thin, flexible substrates. The nanostructures can absorb...]]>
https://www.photonics.com/Articles/Stealth_Sheet_Conceals_Hot_Objects_from_IR/p5/a63597 A63597 Wed, 27 Jun 2018 14:37:19 GMT
Multiple Resonators Can Improve Signal Transmission
Scientists have developed a light wave isolation method for efficient signal transmission that is less costly and more versatile than using a single resonator to induce light waves to travel in just one direction. The new approach does not require an external magnetic field or any other form of external bias for reliable wave transmission, yet it provides highly efficient broad bandwidth isolation.

Schematic of the realized isolator, formed by two coupled nonlinear resonators connected through a delay line. Courtesy of Andrea Alù.
Researchers from the City University of New York and the University of Texas at Austin first showed that any isolator formed from a single nonlinear resonator was limited by insertion loss,...]]>
https://www.photonics.com/Articles/Multiple_Resonators_Can_Improve_Signal/p5/a63126 A63126 Tue, 20 Feb 2018 12:35:22 GMT
Compound Transforms IR into Broadband White Light
A compound that can transform near-infrared (NIR) light into broadband white light could offer a cheap, efficient means to produce visible light. The light is also exceedingly directional, a desirable quality for devices such as microscopes that require high spatial resolution, or for applications with high throughput, such as projection systems.
Illustration of red laser impinging onto the appearing cluster, inducing a glow and the emission of a white-light laser. Courtesy of Nils W. Rosemann. Researchers from the Philipp University of Marburg and Justus Liebig University Giessen designed their compound of tin and sulfur, with a diamondoid-like structure, then coated the scaffolding with organic ligands. When irradiated with NIR laser...]]>
https://www.photonics.com/Articles/Compound_Transforms_IR_into_Broadband_White_Light/p5/a60809 A60809 Tue, 21 Jun 2016 08:14:35 GMT
Diffractive Catheter Enhances OCT Imaging
A new imaging catheter that enables real-time, ultrahigh-resolution OCT imaging at 800 nm to form a 3-D volumetric dataset could potentially improve image contrast via increased light scattering and less tissue absorption.

Called a diffractive catheter, the device was developed by researchers from Johns Hopkins University and the University of Washington. Currently, such catheters and endoscopes are designed to work at around 1300 nm, but a smaller wavelength is more convenient in achieving an ultrahigh-axial resolution with a broadband light source.

Reflected spectra of the imaging catheters with and without a diffractive lens. Images courtesy of Optics Letters.
The instrument features a diffractive microlens to manage...]]>
https://www.photonics.com/Articles/Diffractive_Catheter_Enhances_OCT_Imaging/p5/a55952 A55952 Wed, 12 Mar 2014 00:00:00 GMT
New Device Makes Better Use of Sunlight
A team at MIT has discovered a way to harvest solar energy more efficiently and potentially on demand.

The new solar thermophotovoltaic (STPV) device combines photovoltaic (PV) systems, which turn sunlight directly into electricity, and solar thermal systems, which allow delayed use of energy since heat can be stored more easily than electricity.

A nanophotonic solar thermophotovoltaic device is composed of an array of multiwalled carbon nanotubes as the absorber, a one-dimensional silicon/silicon dioxide photonic crystal as the emitter, and a 0.55-eV photovoltaic cell. Courtesy of John Freidah.

In contrast to a conventional silicon-based solar cell, whose bandgap misses many wavelengths of light, the STPV offers more...]]>
https://www.photonics.com/Articles/New_Device_Makes_Better_Use_of_Sunlight/p5/a55741 A55741 Tue, 21 Jan 2014 00:00:00 GMT
Active Cloak Most Broadband to Date
An active invisibility cloak — that is, one designed to work with an external power source — could significantly broaden the device's operation bandwidth, moving its applications beyond camouflage.

A team at the University of Texas at Austin led by Andrea Alù, associate professor at the Cockrell School of Engineering, proposed a design for an active cloak that draws energy from a battery, allowing objects to become undetectable to radio sensors over a greater range of frequencies. That would give the proposed active cloak a number of new applications, such as improving cellular and radio communications, and biomedical sensing.

Courtesy of The Cockrell School of Engineering at The University of Texas at...]]>
https://www.photonics.com/Articles/Active_Cloak_Most_Broadband_to_Date/p5/a55565 A55565 Thu, 19 Dec 2013 00:00:00 GMT
Photodetector discerns polarized light intrinsically
Few photodetector materials can discern polarized light directly without a grate or a filter, but a newly created carbon-based broadband photodetector demonstrates intrinsic polarimetry. A team from Rice University and Sandia National Laboratories used carpets of aligned carbon nanotubes to create a solid-state electronic device hardwired to detect polarized light across a broad swath of the visible and IR spectra. Such light is important for a number of applications, from remote sensing and communications to astronomy.

“Our photodetector discerns polarized light intrinsically, much like the photoreceptors in the eyes of animals and insects that see polarized light,” said François Léonard of Sandia National...]]>
https://www.photonics.com/Articles/Photodetector_discerns_polarized_light/p5/a54998 A54998 Tue, 01 Oct 2013 00:00:00 GMT
Photodetector Discerns Polarized Light Intrinsically
Few photodetector materials can discern polarized light — individual electromagnetic waves oscillating parallel to one another — directly without the use of a grate or a filter. For a newly created carbon-based broadband photodetector, however, polarimetry is intrinsic to the active material.

A team from Rice University and Sandia National Laboratories used carpets of aligned carbon nanotubes to create a solid-state electronic device that is hardwired to detect polarized light across a broad swath of the visible and infrared spectra. Such light is important for a number of applications, from remote sensing and communications to astronomy.

"Our photodetector discerns polarized light intrinsically, much like the...]]>
https://www.photonics.com/Articles/Photodetector_Discerns_Polarized_Light/p5/a54441 A54441 Thu, 18 Jul 2013 00:00:00 GMT
Moon-Shaped Metamaterial Broadens Manipulatable Bandwidths
A new engineered broadband material crafted from artificial atoms more than doubles the range of light wavelengths that can be manipulated by such metamaterials, a development that could lead to perfect microscope lenses or invisibility cloaks.

Metamaterials — man-made materials that exhibit properties not found in the natural world, such as a negative refractive index — have revolutionized optics in the past decade; so far, however, they have failed to reach their full potential because of their inability to function over broad bandwidths. Designing such a material that works across the entire visible spectrum remains a considerable challenge.

All natural materials have a positive index of refraction — the...]]>
https://www.photonics.com/Articles/Moon-Shaped_Metamaterial_Broadens_Manipulatable/p5/a53852 A53852 Thu, 09 May 2013 00:00:00 GMT
Photonics Accelerates Bandwidth Race
Technological developments in photonics are the future of mobile communications, from speedy interconnects to novel types of fibers and lasers.

How remarkable that the first iPhone was released just over five years ago, back in the “dinosaur-phone era” of 2007. It was only 10 years ago that PDAs (personal digital assistants) were the hottest tool to organize a busy life, even though accessing the Internet with one, much less a phone, was limited and remarkably expensive.

Now, thanks to the phenomenal growth of smartphones and tablets, the demand for bandwidth is greater than ever, a fact that prompted the US to undergo a massive urban build-out of LTE (long-term evolution) wireless broadband networks. In late 2012,...]]>
https://www.photonics.com/Articles/Photonics_Accelerates_Bandwidth_Race/p5/a53051 A53051 Fri, 01 Feb 2013 00:00:00 GMT
Boocock Joins OneChip Photonics
Boocock has more than 25 years of industry experience, most recently as executive vice president of engineering at BTI Systems Inc. Before that, he was a co-founder of Catena Networks (an Ottawa-bsaed broadband access startup sold to Ciena Corp. in 2004) and a member of its senior management team. He was also a senior manager at Nortel Networks.

“Jonathan knows what it takes to succeed in the...]]>
https://www.photonics.com/Articles/Boocock_Joins_OneChip_Photonics_/p5/a52454 A52454 Mon, 03 Dec 2012 00:00:00 GMT
Emcore Selling VCSEL Assets for $17M
The VCSEL is the preferred light source for data transmission in short-distance links, interconnects for data center and local networks (LANs, SANS, etc.). The VCSEL-based module products are designed to enable next-generation data interconnect capabilities for service providers and OEMs. Applications include rack-to-rack, ganged serial links, logic-logic...]]>
https://www.photonics.com/Articles/Emcore_Selling_VCSEL_Assets_for_17M/p5/a50480 A50480 Wed, 28 Mar 2012 00:00:00 GMT
Emcore Gains Solar Cell Contract https://www.photonics.com/Articles/Emcore_Gains_Solar_Cell_Contract/p5/a47613 A47613 Fri, 01 Jul 2011 00:00:00 GMT AFL Opens R&D Plant in Massachusetts
AFL plans to expand the test and inspection division’s professional R&D staff by more than 50 percent in 2011 and has chosen Lowell as the optimum location. It will continue to maintain the division’s facility in Belmont, N.H.

The Lowell facility is near multiple colleges and universities allowing the company to attract new college graduates and to partner on development efforts, said George Rose, general manager...]]>
https://www.photonics.com/Articles/AFL_Opens_RD_Plant_in_Massachusetts_/p5/a47116 A47116 Tue, 17 May 2011 00:00:00 GMT
Emcore Signs Multiyear Solar Cell Contract
The multiyear contract is the second-largest award in Emcore’s history, it said. The company, a provider of compound semiconductor-based components and subsystems for the broadband, fiber optic, satellite and terrestrial solar power markets, will produce the solar cells at its Albuquerque manufacturing facilities.

The agreement is subject to certain terms and conditions, including a provision allowing SS/L to terminate the agreement for convenience.

For more information, visit: www.emcore.com]]>
https://www.photonics.com/Articles/Emcore_Signs_Multiyear_Solar_Cell_Contract/p5/a46987 A46987 Fri, 06 May 2011 00:00:00 GMT
Photonics HyperHighway Could Make Internet 100 Times Faster
Broadband Internet in the UK could become 100 times faster under the University of Southampton's six-year Photonics HyperHighway project, which recently received a major infusion of government funding.

Photonics HyperHighway will team scientists from Southampton and the University of Essex with industry partners such as Fianium and Oclaro to pioneer new technologies that make the Internet faster and more energy efficient. They will look at the way fiber optics are used and develop new materials and devices to increase Internet bandwidth to cope with ever-increasing music downloads and the use of services such as Internet TV and cloud computing. The project will also help industries such as retail and banking by speeding transaction...]]>
https://www.photonics.com/Articles/Photonics_HyperHighway_Could_Make_Internet_100/p5/a45983 A45983 Wed, 16 Feb 2011 00:00:00 GMT