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Measuring Up with High-Power Fiber Lasers
Fiber lasers are used in ever-increasing numbers across a range of applications. In the 2- to 20-kW-power output range, laser applications are growing in materials processing and in finesse applications such as 3D micromilling, microcutting, blind-hole machining, and additive manufacturing. According to Hexa Research, “High-power cutting and welding is a leading application in the [fiber laser] market. This could be attributed to increasing use of the product in tube cutting, flat sheet
Photonics Spectra, July 2019
Backstory: VCSEL Breakthrough, 1989
Thursday, May 11, 1989 It was the first test of our first attempt to fabricate VCSELs. They lit up! Thousands of VCSELs on a crumb-size chip lased readily with low threshold currents (1s of mA), the smallest lasers in the world. The original ~6-...
Photonics Spectra, June 2019
Critical Considerations for Embedded Vision Design
Embedded vision is a hot topic in many industrial spaces. The integration of data processing on board a camera without the need for a back-end PC, server, or other costly system has system developers — in industries from factory test and...
Photonics Spectra, July 2019
IR Metrology with Visible Light
IR instruments are indispensable tools for material analysis, environmental sensing, and homeland security. Through decades of development and commercialization, one common and significant limitation has been the weak efficiency of IR optical...
Photonics Spectra, July 2019
Photovoltaic Technologies Aim for Higher Efficiency Ratings
In a time of growing concern about climate change and the high cost of humanity’s carbon footprint, there are glimmers of hope. A global boom in sustainable energy investment is underway. The Renewable Energy Policy Network for the 21st...
Photonics Spectra, July 2019
Laser World of Photonics 2019
LASER World of PHOTONICS 2019, one of the largest photonics trade shows in Europe, will be held in Munich June 24-27. The biennial event will feature the latest in photonics research, technology, and applications. The fair will take place across...
Photonics Spectra, June 2019
Picosecond Lasers Transform Volume Manufacturing
Laser micromachining has revolutionized volume manufacturing, enabling smaller feature sizes, novel device geometries and materials, improved process yields, and reduced production costs. Industries as diverse as consumer electronics, medical...
Photonics Spectra, June 2019
Optical Coatings with Atomic Precision
Today, optical coatings are a commodity: They exist on all types of professional and consumer optics. Among the various technologies for depositing optical coatings1,2, atomic layer deposition (ALD) stands out for its conformal coating on...
Photonics Spectra, June 2019
LaserNetUS Reinvigorates Ultrahigh-Intensity Laser Research
Since the invention of chirped pulse amplification (CPA) in 1985 by two of the three winners of the 2018 Nobel Prize in physics — Gérard Mourou and Donna Strickland — and the subsequent development of this technology into...
Photonics Spectra, June 2019
From Textiles to Meat: CO2 Lasers Leave Their Mark
Sealed CO2 laser sources are useful in many manufacturing applications — from cutting, drilling, and perforating to marking, engraving, scribing, and welding. They can process a diverse array of materials — including textiles, polymers,...
Photonics.com, June 2019
Antireflective Surfaces via Subwavelength Etching
Antireflection (AR) coatings are essential for applications where light throughput is critical, or where backreflections cause issues. Such issues range from ghosts and glare in imaging applications to unwanted feedback or stray beams in laser...
Photonics Spectra, June 2019
AR, VR Markets Primed for Rapid Growth
After experiencing incremental gains over the past decade, the augmented and virtual reality (AR/VR) markets are poised for swift advancement as the technologies mature and find new uses. Market research firms predict that from 2017 to 2023, the...
Photonics.com, June 2019
Custom Optical Coatings for Cinema, Avionics, and LIGO
Commercial off-the-shelf (COTS) optical components such as filters, beamsplitters, prisms, and mirrors are used in numerous applications, including machine vision, microscopy, and optical test and measurement. These components are often coated with...
Photonics Spectra, May 2019
Advanced Imaging for Quantum Materials Research
Quantum theory seeks to explain the nature and behavior of matter and energy at the atomic and subatomic levels. Such phenomena are elucidated via research that aims to manipulate the state of this matter and energy to achieve accurate, measurable,...
Photonics Spectra, May 2019
Single-Beam Multidimensional Coherent Spectroscopy
Multidimensional coherent spectroscopy (MDCS) is a set of laser techniques that nondestructively measures how evolving matter absorbs and emits light. It was first proposed in 1993 to excite molecular vibrations through the Raman effect, but optical...
Photonics Spectra, May 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 Spectra, May 2019
Member Exclusive
Consumer AR/VR Headsets Focus on Nontraditional Optics
The promise of commercial augmen-ted and virtual reality (AR/VR) technologies seems always to be just around the corner. Nearly three decades have passed since the Sega Corporation announced its Sega VR gaming headset, which was one of the first of...
Photonics Spectra, May 2019
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Holographic Combiners Improve Head-Up Displays
Combiners are semitransparent surfaces used in head-up display (HUD) and augmented reality (AR) systems to overlay an image presented by a projector on top of the viewer’s physical world. The combiner is transparent and lets the viewer see...
Photonics Spectra, May 2019
Optical Advancements Enable High-Precision 3D Imaging
As robotics and automation change the face of manufacturing, demands on industrial inspection have increased. Advancements in engineered point spread function (E-PSF) technology are now allowing manufacturers to incorporate high-resolution 3D...
Photonics Spectra, April 2019
Positioning Technology Gets Smart
Over the span of 40 years, the field of precision positioning has vaulted forward in deeply beneficial ways. Submicron-resolution linear encoders, for example, once available only in the costliest stages, are now affordably integrated into...
Photonics Spectra, April 2019
3D Optical Profiling in Automotive Manufacturing
The automotive industry has undergone major changes over the past couple of decades because of a combination of internal and external factors that include competitive cost-reduction actions and increased environmental regulations. These factors have...
Photonics Spectra, April 2019
Member Exclusive
Imaging in the Blink of an Eye
CMOS cameras and sensors are getting faster. That’s good news for researchers and for the autonomous vehicles market, among others. For researchers, faster imaging enhances spectroscopy, improves resolution, and makes it easier to capture...
Photonics Spectra, April 2019
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Hollow-Core Optical Fibers Offer Advantages at Any Wavelength
Conventional optical fibers are fabulously successful, but they have profound limitations. These include a finite spectral transparency, susceptibility to optical damage, dispersion — which restricts the ability to deliver short and ultrashort...
Photonics Spectra, April 2019
Smart Structures on the Rise
Futuristic smart cities are having their day, with numerous announcements in the past year of plans to begin developing high-tech urban endeavors all over the globe. Developers have revealed ambitious plans for smart cities in the U.S., Canada,...
Photonics Spectra, April 2019
Prism Award Winners Take Center Stage
Amid the bustle of Photonics West, some of the industry’s top innovators gathered on Feb. 6 to honor the best products and advancements at the “Oscars of the photonics industry” — the Prism Awards for Photonics Innovation....
Photonics Spectra, March 2019
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