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Features
Conquering the Silicon Photonics Production Bottleneck
The first computer link using optical fibers was commissioned four decades ago to safeguard communications at the Cheyenne Mountain strategic command center1. We have since seen broad adoption of photonic communications in an unfolding trend of diminishing scale. Transoceanic fiber cables have replaced satellite links; photonic communications have become the backbone of transcontinental communications and serve as the foundation for regional and metropolitan communications, delivering
Photonics Spectra, August 2017
Flat Surface Lens Overcomes Limitations of Conventional Optics
The telescope has been used for more than 400 years. Although there have been many designs created for looking at distant objects, there is a fundamental weakness with the lens system. By necessity, telescopes use curved lenses — which are...
Photonics Spectra, August 2017
Smart Perception is the Next Stage for Machine Vision
Intelligent robotics is one of the technological disruptions that will fundamentally alter society — both from an industrial and a social perspective. And “smart perception” is a key concept that will drive this evolution toward...
Photonics Spectra, August 2017
Portable Spectroscopy and the Fight Against Food Fraud
Food fraud and adulteration is a serious and increasing problem with significant health and economic impacts. Although robust and sophisticated laboratory methods have been developed to detect fraud, the question of how that experience can be...
Photonics Spectra, August 2017
Member Exclusive
Via Photonics, Secure Communications
Much of the world’s communications travel by light. So, data carried on photons moving through free space or over fiber must be made as secure as possible. Quantum key distribution helps do that. Also, security improvements via temporal...
Photonics Spectra, August 2017
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Laser Beam Diagnostics Is a Critical Step in University Research
The scientific endeavors of our university systems are a vital part of the industrial R&D process that produces many of today’s leading-edge designs and manufacturing processes. Much of that development involves lasers of all sizes and...
Photonics Spectra, July 2017
Chalcogenide Glass Molding Advances Precision IR Optics
Today, infrared optics are mainly used in relatively high-priced technical devices. Thermal imaging cameras, for instance, help builders and surveyors identify leaks and thermal bridges in buildings, while night vision systems are used by police and...
Photonics Spectra, July 2017
Member Exclusive
Semiconductor Lasers Power Up
Improvements to semiconductor lasers promise big changes, from increases in power to expanded wavelengths. Other innovations could mean faster data rates for a bandwidth-hungry world. And then there are self-driving cars. Equipped with lidar,...
Photonics Spectra, July 2017
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Hybrid TDI Sensors Feature Faster Line Rates and Higher Sensitivity
Time delay integration (TDI) sensors have been around for almost 40 years now. The concept originated from the days of film cameras, when the idea of opening the shutter and rolling the film at the same speed as the moving target recorded a...
Photonics Spectra, July 2017
Dynamic Beam Shaping Improves Laser Cutting of Thick Steel Plates
Even though thick plate cutting has a subsidiary market share in laser material processing, it is still a necessary feature for state-of-the-art machines. In recent years, research has concentrated on various quality issues, especially dross...
Photonics.com, May 2017
Quantum Dots, Fluorescent Proteins Vie for Supremacy
The first advances in color displays date to the mid ’50s with the development of the cathode ray tube1, the primary display technology until liquid crystal displays (LCDs) emerged a decade ago. For a brief period, plasma technology showed...
Photonics Spectra, July 2017
Interweaving Photonics Research, Industry
Laser World of Photonics provides a spotlight for promising newcomers, industry veterans and innovative companies. And with tens of thousands of people from countries around the globe attending the show, that spotlight is huge. In 2015, the biennial...
Photonics.com, June 2017
Interweaving Photonics Research, Industry
Laser World of Photonics provides a spotlight for promising newcomers, industry veterans and innovative companies. And with tens of thousands of people from countries around the globe attending the show, that spotlight is huge. In 2015, the biennial...
Photonics Spectra, June 2017
Member Exclusive
IoT Unlocks New Markets for Compact Optical Sensors
It’s a complex, technology-mixing ecosystem that combines sensors, IT and networking technologies to enable billions of devices to be connected around the world. On a typical day, you may not even realize the plethora of smart technology...
Photonics Spectra, June 2017
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Demanding Applications Call for Reflective Objectives
Laser systems costs are falling, leading to their increased use in a host of demanding applications from machining to hyperspectral imaging. Often in these cases, a small, diffraction-limited spot size is required. When specifying a microscope...
Photonics Spectra, June 2017
Fast and Sensitive Mid-IR Detectors for Gas Sensing
Demands from industrial, petrochemical and new medical diagnostic applications are very wide-ranging — from air quality, emission monitoring and leak detectors, to breath analyzers and explosive material sensors. For many years, mid-IR...
Photonics.com, June 2017
Optical Sensors Advancing Precision in Agricultural Production
Agricultural production, already incredibly efficient in much of the developed world, is increasing each year — this is a necessity to feed the 9+ billion people expected on the planet by 2050. A great example of productivity gains is in corn...
Photonics Spectra, June 2017
Designing Lighting Systems Tuned to Circadian Rhythms
There is a lot of interest these days in the physiological effect of light on the human body. Variously referred to as human-centric lighting, biological lighting, or circadian lighting, all reflect the emerging understanding that light can have a...
Photonics Spectra, June 2017
Spectroscopy for the Masses
The past few years have seen an explosion in consumer adoption of connected and wearable devices, which has been good for photonics. In 2017, nearly 40 million consumers in the U.S. alone (roughly 30 percent of households) are expected to own...
Photonics Spectra, June 2017
Member Exclusive
3D Imaging Aids Life Sciences
While human bodies and single cells are three-dimensional, in the past, imaging of them often was not. Data might be captured in two-dimensional slices during a computed tomography, magnetic resonance, ultrasound or even microscope study. But the...
Photonics.com, June 2017
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Fiber Laser Welding Cuts Costs and Improves Results
Most traditional — i.e., nonlaser — welding techniques currently in use are variations of arc welding. In these methods, two pieces of metal are first brought into contact or close physical proximity. The edges of the pieces may have...
Photonics.com, June 2017
Free-Space Optical Communications Comes of Age
Back in the early 1960s, when first the laser and soon thereafter the semiconductor laser were invented, it was predicted by visionaries that, before long, such sources of coherent light would be used for communication. It actually took more than 25...
Photonics Spectra, May 2017
A Breakthrough for Reference-Free Holography
The term “holography” means a drawing that contains all the information of light — including its intensity and phase information. In contrast, photography only measures the intensity of light, and thus cannot address...
Photonics Spectra, May 2017
Member Exclusive
Added Intelligence Transforms Medical Sensors Into Diagnostic Devices
As sensors shrink in size, they are able to reach places that were previously inaccessible — such as inside the human body. What is more, incorporating such increasingly tiny sensors within a medical device means there is more space left for added...
Photonics Spectra, May 2017
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Superluminescent LEDs Bridge the Gap
Superluminescent light-emitting diodes are broadband semiconductor devices that are closely related to their more commonly known relatives, laser diodes and light-emitting diodes. All three architectures consist of positively (p)-doped and...
Photonics Spectra, May 2017
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