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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, autonomous vehicles are likely to spark demand for improved semiconductor lasers. Finally, researchers are investigating semiconductor lasers that can be built to output any desired wavelength, enabling new uses. For some applications, what’s important is...
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
Defense Drones Take Sensing to New Heights
They’re lurking in the air in the trouble spots around the world, from the mountains of Afghanistan to the deserts of Iraq and Syria, to the disputed waters of the South China Sea. Unmanned aerial vehicles (UAVs), or drones, are acting as the...
Photonics Spectra, April 2017
50 Years of Photonics in Defense
The Airborne Laser and Advances in Airborne Optics (2006-Present) In the early 2000s, Boeing and other contractors developed the Airborne Laser (ABL), consisting of lasers aboard a plane that would effectively target and destroy ballistic missiles...
Photonics Spectra, April 2017
High-Speed IR Detectors Aid Ballistic Testing
For many years, high-speed visible cameras offered the ability to stop motion on fast-moving objects and provided unique insight through slow-motion playback for high-speed applications such as ballistics, munitions and tracking applications....
Photonics Spectra, April 2017
DCS 2017 Brings Defense, Environment Into Focus
Changes in the nature of warfare in today’s high-tech world demand the most advanced tools for soldiers and others in the defense and security sectors. Environmental and health care segments are evolving, too, as an onset of innovative...
Photonics Spectra, April 2017
Member Exclusive
From Crop Science to Space Exploration, Optical Sensing on the Rise
From smartphones, smart homes and autonomous vehicles to crop science, food inspection and space observations, optical sensors are finding increasing use in the commercial sector. Image sensing evolved from the military arena to commercial...
Photonics Spectra, April 2017
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Laser Microfabrication Techniques Move Rapid Prototyping to the Mainstream
Rapid prototyping is a fabrication technique that uses additive layer-by-layer fabrication to create three-dimensional structures from devices ranging in scale from MEMS devices to 3D-printed houses. The technique has its origins in the mathematical...
Photonics.com, February 2017
UV Lasers Aid Wearables Manufacturing
Wearable technology has come a long way since the first smart watches and fitness trackers were introduced. Flexible printed circuitry and smaller components enable more powerful features and services in compact designs. Smart fabrics, leather and...
Photonics.com, February 2017
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