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Raman Spectroscopy Peers Through Packaging
Raman spectroscopy is a well-established molecular spectroscopic technique for noninvasive and nondestructive chemical analysis. It is used to identify mostly organic materials, such as carbon nanomaterials, controlled substances and hazardous chemicals, pharmaceutical raw materials, gemstones and minerals, pigments and paintings in art works<sup<>1,2,3, and diseased tissue4. The instrumentation can be portable — even handheld — and equipped with software that, together
Photonics Spectra, February 2018
Onboard Lidar Detects Turbulence, Volcanic Ash Near and Far
The accurate measurement of relative air speed, temperature and pressure is essential for the flight control system to operate safely and economically within the operational envelope and set flight corridor. Air speed is typically measured using...
Photonics Spectra, February 2018
Member Exclusive
New Frontier for Quantum Sensing
Quantum physics is a peculiar field. In the subatomic domain, the usual physical laws no longer apply. Instead, nonintuitive behaviors reign and new laws govern. A case in point is the Heisenberg uncertainty principle, which tells us that it is not...
Photonics Spectra, February 2018
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Additive Manufacturing Ups Its Game
Additive manufacturing builds up parts by binding plastics and other materials together, with lasers, LEDs, other light sources, heaters or electron beams supplying the necessary energy. The resulting parts are light yet still strong. What’s...
Photonics.com, December 2017
Reflections on a Storied Career
For 18 years, Eugene Arthurs, Ph.D., has served at the helm of SPIE, the international society for optics and photonics. During that time, SPIE saw its membership ranks expand, launched seven new journals, marked its 50th anniversary and, in 2008,...
Photonics Spectra, January 2018
Evolution of the Supercontinuum Light Source
For many applications, coherent light at a single frequency is more than adequate. But having a light source that combines the properties of a laser with the broad bandwidth of an incandescent bulb and a short pulse duration opens up a new realm of...
Photonics Spectra, January 2018
Optics Transforming AR, Wearables and Beyond
The sea change of optics usually moves gradually, but today we are on the precipice of rapid change. As in the past, optics continues its coupling with other nonoptical technologies — fabless semiconductor manufacturing, microelectronics,...
Photonics Spectra, January 2018
Breakthrough in Fabricating Active-Matrix GaN Microdisplays
The growing interest in wearable devices has highlighted the need for high-performance microdisplays. Such displays are based on technologies that include reflective or transmissive liquid crystal displays (LCDs), organic LEDs (OLEDs) or MEMS-based...
Photonics Spectra, January 2018
Packing More Performance Into Smaller Spectrometers
From food safety and manufacturing efficiency, to environmental testing and medical diagnosis, optical spectroscopy is already an indispensable tool across several industries. Today, thanks to miniaturization of instruments and sophisticated...
Photonics Spectra, January 2018
Member Exclusive
New Laser Technologies Displacing Old
For some CO2 laser applications, the end is at hand, with fiber lasers having almost totally replaced the older technology. Another shift currently brewing is due to the arrival of high-power diode lasers, which are impacting materials processing...
Photonics Spectra, January 2018
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Photonics West Brings Together Industry’s Best, Brightest
With three conferences — BiOS, LASE and OPTO — and two exhibitions, SPIE Photonics West is the world’s largest annual event for the photonics, laser and biomedical optics industries. And it’s just around the corner —...
Photonics Spectra, December 2017
Display Technologies Shape the Immersive Experience
Almost four years ago, Facebook’s Mark Zuckerberg plunked down a reported $3 billion for technolgy company Oculus VR and said, “We believe this kind of immersive, augmented reality [AR] will become a part of daily life for billions of...
Photonics Spectra, December 2017
Member Exclusive
Optical Techniques Tackle Nanoscale Measurements
Materials at the nanoscale can behave in surprising ways. While the properties of macro materials can often be predicted, the behaviors of a material invisible to the naked eye can differ greatly. Providing insight into this nanospace is essential...
Photonics Spectra, December 2017
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Pushing the Limits of Interferometric Testing
Laser interferometers have come a long way in the last 40 years. At 76 million independent surface image points per second in phase-shifting mode, the latest in laser interferometer instrumentation delivers extreme levels of surface...
Photonics Spectra, December 2017
Fabricating Precise Polymer Optics
Polymer optics are one of the cornerstones of photonics, driving the innovation necessary to meet the requirements for ever-smaller installation spaces and significant weight savings, all while achieving a higher image quality. The miniaturization...
Photonics Spectra, December 2017
Competition, Collaboration Fuel US Photonics Industry
Photonics production in the U.S is a multibillion dollar industry. Programs such as the American Institute for Manufacturing Integrated Photonics (AIM Photonics), as well as developments in technology are helping to fuel the market. Industrial...
Photonics.com, December 2017
Advances in Power and Tunability for GaSb-VECSELs
Recently, there has been growing demand for light sources in the near- to mid-infrared range with high output power in combination with good beam quality. This demand is driven by applications such as optical pumping Holmium:YAG lasers or optical...
Photonics Spectra, December 2017
Quality, Durability, Relability Critical for Solar Photovoltaics
Making decisions that ensure the quality, durability and reliability of a photovoltaic (PV) is crucial for the development, installation and lifetime of a system. There are multiple ways in which these three attributes can be designed into all...
Photonics.com, December 2017
Fast EEF Spectroscopy Quantifies Unstable Samples
Excitation-emission fluorescence spectroscopy (EEF) is particularly interesting in materials characterization, environmental science and the food industry. For example, the user can quantify multiple emitting sites in rare-earth doped crystals1 or...
Photonics.com, December 2017
Thin 2D Materials Pack a Heavy Punch
Two-dimensional materials such as graphene, as well as composite materials such as the layered semiconductor germanium selenium, could have a big impact on myriad applications. Composite materials that act as a single-photon emitter may be valuable...
Photonics.com, December 2017
Terahertz Window Offers Untapped Potential
Sandwiched between the infrared and microwave parts of the electro-magnetic spectrum lies the terahertz window — a valuable and largely untapped portion of energy that can reveal a huge variety of unknowns, from hidden weapons and suspicious...
Photonics Spectra, November 2017
Member Exclusive
Promise of Organic Photonics Looms Large
Organic materials could supersede their inorganic cousins in many applications thanks to some unique and intriguing properties. From lasers, lighting and Li-Fi (light fidelity) to OLED TVs and solar cells, organic photonics offers a thin, flexible...
Photonics Spectra, October 2017
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NIRS and Chemometrics Offer Insights Into Earth’s Surface
When applied to hyperspectral remote sensing images, the techniques of near-IR spectroscopy (NIRS) and multivariate chemometric calibrations, such as partial least squares regression, enable quantitative mapping of the properties of Earth’s...
Photonics Spectra, November 2017
Laser Light Source Delivers Superior Optical Control
Legacy light sources such as halogen and metal halide produce highly collimated directional beams, but with short life and lower efficiency than LED sources. LEDs are highly efficient and long lasting, but are poor at creating beam angles below 10...
Photonics Spectra, November 2017
Silicone Immersion Objectives Answer the Call for Higher Resolution
Refractive index mismatch, and resulting spherical aberration, has historically plagued researchers interested in long-term, live-cell imaging at high resolution. The use of silicone oil objectives helps mitigate this mismatch as the refractive...
Photonics Spectra, November 2017
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