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All-Optical Switching Alternatives for Data Processing
For decades, computer technology has steadily achieved astonishing gains in performance, but it is becoming increasingly unclear how much longer this rapid progress can continue without considerable technological innovation. For example, the complementary metal oxide semiconductor (CMOS) transistors that have enabled such remarkable advancements in processing power now face physical constraints that could limit future gains in performance.
Photonics Spectra, July 2020
Visible Supercontinuum with Orientation-Patterned Gallium Phosphide
Supercontinuum generation occurs when intense laser light creates nonlinear processes in a material and produces a continuous, broad spectrum of colors. It is a well-known phenomenon in bulk media and in optical fibers, and is also an important...
Photonics Spectra, July 2020
Remote Sensing Puts Focus on Climate Change
As temperatures and carbon dioxide concentrations rise to levels not previously recorded, shifts in weather and other environmental changes are impacting the global landscape. With the U.N. recording one climate-related crisis every week in 2019,...
Photonics.com, June 2020
Noncontact Metrology for Aspherical Lenses
Freeform and aspheric optics have become popular because they provide better performance than traditional optics and can do so with fewer optical elements. The downside of the higher performance is increased complexity in design, manufacturing, and...
Photonics Spectra, June 2020
Pandemic Delays Sessions, Drives Conferences Online
During a time of year when many representatives of the photonics industry would be gathering at conferences in Europe and beyond, the COVID-19 pandemic has necessitated a shift in the timing and format of trade shows. Some are being postponed,...
Photonics.com, June 2020
Developing a New Class of Electro-Optic On-Fiber Devices
To take advantage of 5G technology, networks must be capable of moving huge amounts of data at unimaginable speeds and extremely broad bandwidth. 5G networks should enable downloads at a rate of more than 30 gigabytes per second (GB/s), which is...
Photonics Spectra, June 2020
OLED Technology Gives Displays New Flexibility
For generations, televisions were furniture — bulky appliances that were nearly impossible to ignore, even when turned off. But at this past January’s Consumer Electronics Show, LG Display pulled a dazzling disappearing act, with a...
Photonics Spectra, June 2020
Freeform Optics Produces a New Wave of Integration
Metal optics have been around for a long time in a variety of industrial and commercial applications. Recently, new options have been added to freeform optics in the manufacturing process. With new materials, improved precision machining, and the...
Photonics.com, June 2020
Ramping Up with High-Intensity Lasers
In Europe, China, and the U.S., laser projects — either built or planned — are ramping up intensity, with systems now reaching peak power of 10 petawatts (PW), or 10 million billion watts. On the drawing boards are lasers that will crack...
Photonics Spectra, May 2020
Lidar Design Optimization with Advanced Optical Resins
Designing new automotive lidar systems is a complex process, made easier with access to finite element method simulation software and materials data. One of the key simulations performed is time of flight (TOF), a process that measures the laser...
Photonics Spectra, May 2020
Filtering Visible Light According to Wavelength and Bandwidth
Broadband light sources such as supercontinuum lasers and lamps have been in high demand in the photonics industry due to their versatility and optimal output power. Some supercontinuum lasers have an output power in the range of tens of watts with...
Photonics Spectra, May 2020
Holograms as Security Features: Origination, Development, and Perception
As anti-counterfeiting features, holograms are present on various products, from banknotes and credit cards to children’s strollers. Most people encounter them every day, yet they are often unaware of their presence. Holograms are subject to...
Photonics Spectra, May 2020
Member Exclusive
Sensor Fusion: The Automotive 6th Sense
Advanced vehicles today are full of sensors for monitoring motion, speed, position, pressure, temperature, moisture, and emissions. The number of sensors in cars and trucks will only continue to grow as the demand for advanced driver-assistance...
Photonics Spectra, May 2020
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Prism Awards Celebrate Innovation
The 12th annual Prism Awards ceremony showcased the best in photonics innovation: hand-held spectrometry, plug-and-play inspection, multispectral imaging, and more. The event, sponsored by SPIE and Photonics Media, honors the most innovative and...
Photonics Spectra, March 2020
Hyperspectral and Multispectral Imaging
Over the past two decades, hyperspectral imaging and multispectral imaging have been growing in prominence and utility. Although the terms are often conflated, they represent two distinct imaging practices, each fitting its own application spaces....
Photonics Spectra, April 2020
High-Pulse-Energy Air-Cooled Lasers
Size, weight, and power (SWaP) are key attributes of laser transmitters for military, defense, and aerospace applications. Battlefield lasers must be compact, lightweight, and have high wall-plug efficiencies to meet aggressive demands. Fiber lasers...
Photonics Spectra, April 2020
Lasers for Hybrid Silicon Photonic Integration
The wide adoption of smartphones, high-definition content streamed on social media, the Internet of Things, data saved to the cloud, and artificial intelligence used in massive data analytics have ushered in the current era of digital economies and...
Photonics Spectra, April 2020
Car In-Cabin 3D Sensing Is Within Sight
It is expected that in the future, cars will drive themselves. Between now and then, though, cars will partially drive themselves, much like today’s Tesla with Autopilot. Ensuring that drivers are paying attention during assistance is, and...
Photonics Spectra, April 2020
Coded Aperture Correlation Holography
Coded aperture correlation holography (COACH) is a recently developed 3D-imaging technology. It began as a regular in-line, two-beam interference holography and has evolved into an interferenceless technique based on a working principle entirely...
Photonics Spectra, March 2020
Moth-Eye Metasurfaces for Fiber Optics
The use of optical fiber in astronomy, biomedical instrumentation, communications, defense, digital projection, industrial laser, medical, and sensing applications has increased over several decades to the point that it is now almost ubiquitous....
Photonics Spectra, March 2020
Member Exclusive
The Reality of Intelligent Manufacturing
“Rise of the Machines,” the third “Terminator” sci-fi movie, features a future controlled by cold, calculating cyborgs that make their own decisions, including going back in time to exterminate the human resistance. While the...
Photonics Spectra, March 2020
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Metamaterials Extend Photonics
Metamaterials — engineered to have unique photonic and other properties — can enable previously difficult or impossible-to-achieve performance. Radar or lidar steering, for instance, can be achieved inexpensively without moving parts....
Photonics Spectra, March 2020
Pulsed Lasers Create Optimal Cladding for Tools
Lasers are versatile tools with negligible changeover times in manufacturing processes, but in some areas their uses are still suboptimal, such as in welding. Crack formation and problems with fusion of material can still occur and hinder the...
Photonics.com, March 2020
The New Technologies Shaping Near-Infrared Spectroscopy
Near-infrared (NIR) spectroscopy is the branch of vibrational spectroscopy related to the molecular absorption of light between ~750 to 2500 nm, which has a variety of industrial and medical applications. This region of the electromagnetic spectrum...
Photonics Spectra, February 2020
Special Majorana-Like Vector Photon Beams
A special, newly proposed photon called a “Majorana-like” photon possesses spin angular momentum (SAM) and orbit angular momentum (OAM) coupled together. Experiments with mouse brain tissue have revealed the plausibility of using these...
Photonics Spectra, February 2020
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