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Trends in Optics
Advances in optics in the past year or two have ranged from promising new optical materials to innovations in existing technologies. From optical coatings and add-on kits to quantum dots and metadevices, the scope of progress is as extensive as it is varied. In consumer electronics, for example, the trend for high-definition viewing and new displays is pushing precision optics to the fore. Even trends in consumer viewing habits are having an impact: For example, the growth of online and
Photonics Spectra, January 2014
Where the Jobs Are Now
As I contemplated today’s photonics job/employment environment, and the business climate and outlook for 2014, I went back to the “Where the Jobs Are” article I wrote for the August 2012 issue of Photonics Spectra. One difference...
Photonics Spectra, January 2014
Designing Fiber Amplifiers for Short and Ultrashort Pulses
Fiber amplifiers are in some respects ideal for amplifying short and ultrashort pulses. But serious limitations arise, particularly from nonlinearities, and many aspects must be checked for optimized amplifier systems designs. In several respects,...
Photonics Spectra, December 2013
For Lasers, No Vibrations Allowed
Efficient use of a laser beam is dependent not only on the power of the laser source and beam quality, but also on its precise guidance. Short- and ultrashort-pulse lasers are used to remove materials on an atomic level for high-precision...
Photonics.com, December 2013
InP PICs Enable High-Efficiency Optical Transceivers
Indium phosphide-based photonic integrated circuits (PICs) eliminate optical loss between different functional elements and use high-efficiency optical modulators to enhance performance. They are indispensable in the development of the...
Photonics Spectra, December 2013
Interferometry Offers Accurate Wavelength Measurements
New solutions for fast and accurate wavelength measurements use interferometer technology, which offers a number of benefits compared with classic spectrum analysis. As soon as highly accurate wavelength measurements are required, calibration and...
Photonics.com, December 2013
NIR Helps Lower Costs, Optimize Processes
Near-infrared spectroscopy moves out of the lab and into manufacturing. Economic volatility continues to put pressure on manufacturers, increasing the focus on cost reduction and process optimization across applications. To make improvements in...
Photonics Spectra, December 2013
Photonics Is About to Get Flatter
Graphene holds great potential for a variety of applications, from photovoltaics to lasers and sensors. Two-dimensional materials could soon provide useful photonic solutions for our 3-D world. Graphene – a single layer of carbon – might...
Photonics Spectra, December 2013
Time-Resolved SRS Spectroscopy Facilitates Combustion Research
A new spontaneous Raman scattering spectroscopy technique uses an intensified EMCCD sensor to perform time-resolved combustion diagnostics. To perform successful time-resolved spontaneous Raman scattering spectroscopy in combustion, one critical...
Photonics Spectra, December 2013
Tough Times Call for European PV Manufacturing to Step Up
With a tough economic market and global differences in government subsidies, it has never been more important for European PV makers to focus on their production techniques to make solar even more profitable. Over the past 20 years, the European...
Photonics.com, December 2013
Amplitude-Modulated Sensors Could Save Pilots from Wire Hazards
AM scanning laser rangefinder sensors could make less costly, lighter-weight systems for helicopter-mounted wire-warning systems. Wires represent a significant hazard for low-flying helicopters: Collisions with unobserved wire obstacles can result...
Photonics Spectra, November 2013
Big Photonics Advances Build and Power Big Telescopes
Bigger aspheric mirrors enable astronomers to see farther into space – but they require special designs. For astronomers, bigger is better: In general, the scientific value of a telescope scales to the fourth power of its diameter. So,...
Photonics Spectra, November 2013
CCD Sensors Tailored to Space Applications
Designing image sensors for the ESA’s Euclid mission demonstrates the importance of customization for specialty uses and harsh environments. Adapting commercial electronic parts for space applications usually consists of little more than the...
Photonics Spectra, November 2013
Dual- and Triple-Band AR Coatings Enhance IR Systems
Advanced dual-band coatings improve camera performance in the 3- to 5-µm and 8- to 12-µm spectral regions. Dual-band infrared camera systems allow the 3- to 5-µm and 8- to 12-µm spectral regions to be viewed and compared....
Photonics Spectra, November 2013
Silica-Based Fiber Boosts Broad-Spectrum Spectroscopy
Fibers with a broad optical spectrum are useful in spectroscopic applications because they enable the collection and analysis of more information over a greater wavelength range. A variety of spectroscopic applications require light transmission...
Photonics Spectra, November 2013
Space Lasers Set to Protect Earth, Project Data
From obliterating asteroids to nudging space trash, lasers in space are becoming every bit as futuristic as they sound. Lasers in space have long been a science-fiction writer’s delight, but with current projects such as LightForce and DE-STAR...
Photonics Spectra, November 2013
Excimer-Laser Metrology Improves Lithography Process Control
Process- and technology-specific correlations can be established for better process control, and to prevent excursions. As Moore’s law marches on, semiconductor manufacturers rely on advances in photolithography – the use of 193-nm ArF...
Photonics Spectra, October 2013
GDD Measurements Boost Ultrafast Laser Performance
Easy group delay dispersion measurements improve results in applications such as laser amplifiers, optical coatings, harmonic generation, bioimaging and microscopy. “Dude, where’s my pulse width?!” Anybody working with an ultrafast...
Photonics Spectra, October 2013
How Wedge and Decenter Affect Aspheric Optics
A look at the geometric parameters of aspheres and how they differ from those of spherical optics as well as the metrology techniques required to quantify those parameters in manufacturing Driven by the ever-increasing resolution and field size of...
Photonics Spectra, October 2013
MicroLED Sources Enable Diverse Ultralow-Power Applications
A brush with the second law of thermodynamics can increase a product’s on-shelf appeal – and more. The drive toward LED-based lighting has resulted in the development of devices with ever-increasing light output and color performance....
Photonics Spectra, October 2013
Optics for DPSS Lasers: Finding a Balance
Building efficient, reliable DPSS lasers requires optics with low loss and excellent stability – but these optics can’t drive up the cost. Reduced demands on pump power, thermal management systems and environmental controls can offset...
Photonics Spectra, October 2013
Active Pulse Management Enables Femtosecond Athermal Ablation
In extremely short pulses, generally in the several-hundred-femtosecond regime, light interacts with matter fundamentally differently from the way other forms of energy do. This interaction allows micron-resolution features to be machined in...
Photonics Spectra, September 2013
Better Materials Mean Better Solar Cells
Innovation in materials research is revealing a future in which solar power is inexpensive and efficient, and sunlight-harvesting thin films cover everything from airplanes to buildings. Crystalline silicon, or c-Si, is the dominant photon-absorbing...
Photonics Spectra, September 2013
LEDs Offer a Lighting Makeover
New materials and manufacturing techniques are bringing LEDs closer to cost-effectiveness. The venerable lightbulb is going high-tech, thanks to LEDs: Light-emitting diode products are more efficient, longer-lived and more versatile than...
Photonics Spectra, September 2013
Multimode Splitters Improve Data Transmission
A new generation of multimode splitters offers impressive features and performance for optical fibers used in data centers and other applications requiring large data transfer. Optical waveguides have been the vanguard of data transmission for...
Photonics.com, September 2013
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