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Motion Control Solutions for High-Precision, Large-Field Laser Micromachining
High-precision, high-throughput laser micromachining typically requires galvo scan heads with a short focal length, which in turn produces a small image field, or field of view (FOV). However, a growing number of high-tech manufacturing areas, such as OLED display fabrication, require the processing of workpieces larger than can fit into these reduced image fields, while simultaneously requiring a high level of accuracy and throughput. The same applies for many other laser micromachining...
Photonics Spectra, November 2019
High-Speed 3D Inspection with Liquid Lenses
The concept of liquid lenses, which involves controlling the shape of a liquid to alter the properties of a lens, is not new. The human eye uses this concept every day as it focuses on objects near and far. The ciliary body of the human eye contains...
Photonics Spectra, November 2019
Characterizing Microplastics with Raman Spectroscopy
We live in a disposable world. Plastic throwaway utensils and packaging litter our landfills and often end up in our oceans. The large pieces pose problems for aquatic life. Mistaking litter for food, sea life eat it, which wreaks havoc on the their...
Photonics Spectra, October 2019
Face Recognition Systems and Consumer Devices
Many forms of biometric authentication are technically feasible, but one in particular has won acceptance in use cases that call for high security and minimal intrusiveness for the user: face recognition. Today, most people’s interactions with face...
Photonics Spectra, October 2019
Aspheric Optics for Nuclear Research
Editor’s note: This is Part 2 of a two-part feature on optics for nuclear research. Part 1 appeared in the September issue and looked at high-power laser facilities and the critical role of aspheric optics in these demanding conditions. Part 2...
Photonics Spectra, October 2019
Advancements in Ultrafast Multi-100-W Average-Power Thin-Disk Lasers
n both scientific research and in industrial materials processing, high-average-power diode-pumped solid-state lasers have become an indispensable tool. A crucial aspect of these lasers is the need for effective heat removal without introducing...
Photonics Spectra, October 2019
Using Sound for Faster Optical Communications Networks
Data information is transferred across and within countries, cities, and continents at near the speed of light, and optical fibers carry most of it. Such speeds seem adequate for the current global internet backbone. However, because of the...
Photonics Spectra, October 2019
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Optimizing Freeform Optics
Astronomical imaging from both ground and space provides precise data, and each has its pros and cons. Ground-based observation benefits from flexible infrastructure with large telescopes and instruments but suffers from atmospheric turbulence and...
Photonics Spectra, October 2019
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Improved Lasers and Techniques Benefit Materials Processing
For laser materials processing systems, power levels are up, costs are down, and there are innovations in beam delivery and control. These developments are expanding the use of lasers in welding, cutting, surface treatment, and other applications....
Photonics Spectra, September 2019
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Aspheric Optics for Nuclear Research
Nuclear research laser facilities around the world increasingly use powerful, amplified, ultrashort-duration pulses of coherent light to deliver massive energy densities at a given target. The synchronized delivery of such high-power pulses...
Photonics Spectra, September 2019
Measuring Aspheres: Selecting 2D or 3D Metrology
As aspheres become more prevalent in optical systems and more companies design systems that include them, it is crucial that both designers and manufacturers understand what is needed and what the limitations are in regard to metrology. The most...
Photonics Spectra, September 2019
Ball Lenses for Telecom
With the explosion of high-bandwidth communications, fiber infrastructures are experiencing upgrades that demand improvements in both range and power at the lowest possible SWaP-C (size, weight, power, and cost). As a result, ball lenses —...
Photonics Spectra, September 2019
OLED Modules for Textile Integration
Flexible organic light-emitting diode (OLED) elements are destined for integration into textiles, and they promise to be an optimal technology for integrating light into clothing and other cloth surfaces. The demand for flexible OLED integration...
Photonics Spectra, September 2019
Photoluminescence Spectroscopy Optimizes Perovskite Quantum Dots
Perovskite semiconductors have attracted tremendous attention in recent years because of the rapid rise of perovskite solar cell efficiencies — from less than 10% to more than 20% in less than five years — and the potential for the...
Photonics.com, September 2019
Innovative Design of Optical Systems Boosts Industrial Metrology
Image sensor evolution has been extremely expansive since the first digital camera was created in 1975. In more recent years, increasing use of image sensors has rapidly driven camera chip evolution in many aspects: resolution, sensitivity,...
Photonics Spectra, December 2019
Display Manufacturing Enriches Consumer Products
Consumer electronics are growing more sophisticated, at breakneck speed and with remarkable advancements in technology and refinement. A highly visible example is the ever-increasing picture clarity in large-screen TVs, and in the evolution of...
Photonics Spectra, September 2019
Demand for Versatile CMOS Sensors Continues to Grow
Twenty-five years ago, physicist and engineer Eric Fossum predicted the end of the charge-coupled device (CCD) imaging sensor. Fossum, a Dartmouth University professor who was then at NASA’s Jet Propulsion Lab just north of Pasadena, Calif.,...
Photonics Spectra, September 2019
Fiber Optic Sensors Compete in Environmental Monitoring Market
Modern societies are facing rising concerns about global environmental issues, including an alarming rise in pollution of our seas, waterways, land, and air. As we bear witness to widespread industrialization along with mass consumption trends,...
Photonics.com, September 2019
Data Centers and More for Silicon Photonics
Decades of research and development are finally paying off for silicon nanophotonics. The silicon optical transceiver market, for example, is projected to grow nearly twentyfold in volume over the next five years, much of it driven by the needs of...
Photonics Spectra, August 2019
Robust Optical Materials for Aerospace and Laser Applications
While single-crystal materials and ceramics are not as widely used for optical applications as glass, there are niche applications, such as aerospace, submarine optronic, and high-energy laser windows, for which these materials are favored. The...
Photonics Spectra, August 2019
Protecting Photonic Quantum States Using Topology
The use of topology to protect quantum information is well known to the condensed-matter community and, indeed, topological quantum computing is a burgeoning field of research. It is one of the competing avenues to demonstrate that quantum computers...
Photonics Spectra, August 2019
Visible Entangled Photons from an Ultrafast Fiber Laser Source
Entangled photons are key to the development of optical quantum technologies such as enhanced metrology, computing, and communication. It is projected that the global quantum communications market will reach $1.53 billion by 2023, with an estimated...
Photonics Spectra, August 2019
Long-Lifetime Laser Diodes for Space
There has been a flurry of announcements in the news recently about low-Earth-orbit satellite constellations, which are primarily expected to be able to provide wideband internet anywhere in the world. Many of these satellite networks will require...
Photonics Spectra, August 2019
Integrated Photonics Looks to Advance Safety for Lidar
The history of radar (radio detection and ranging) dates back to the 1880s when renowned German physicist Heinrich Hertz showed that radio waves were reflected by metallic objects. Based on the principles demonstrated by Hertz, Christian...
Photonics Spectra, July 2019
On the Shoulders of Giants
For millennia, scholars in the old and new worlds have realized that their efforts depend largely on the works of those who came before. The “eureka!” moments experienced by scientists and other observers of nature do arise, but there...
Photonics Spectra, June 2019
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