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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 laser has probably uttered these (or similar) words at some point. Symptoms of pulse width problems can come in the form of lower conversion efficiencies, fainter microscope images or lower signal-to-noise ratio (SNR) for a given experiment. ...
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
Optical Sensors Speed Up Production Lines
Recent advances in optical sensors enable the industry to monitor manufacturing processes on line in real time at a very fast rate. Optical sensors are not only essential for safety on the production line, but they are also fast becoming an...
Photonics.com, September 2013
Photonics Helps Create Greener Airways
Laser and imaging technologies are helping aircraft manufacturers make their processes more eco-friendly. White contrails in the sky could soon be tinged green, thanks to increased airplane efficiency brought about by manufacturing using lasers and...
Photonics Spectra, September 2013
Plastics Additives Allow Inkless Marking
The development and refinement of plastics additives or laser sensitivity enable high-contrast marking of plastics in combination with a suitable laser beam. Here’s how to choose the right additives for the job. Thanks to lasers, manufacturers...
Photonics Spectra, September 2013
Raman Overcomes Challenges for Industry
Raman spectroscopy is becoming increasingly prevalent in commercial applications. Challenges include making remote measurements of chemical species in high-pressure or high-temperature environments while customers demand compact instrumentation with...
Photonics Spectra, September 2013
Standardized Process Could Revolutionize Photonic Integration
A generic foundry approach could result in a dramatic cost reduction for production of PICs for a variety of applications. A revolution is coming in photonic integration technology, facilitated by the introduction of generic foundry processes:...
Photonics.com, September 2013
Wafer-Scale Micro-Optics Fulfill Promise
Early inventions in the field of planar diffractive and refractive micro-optics date back more than a century. In 1891, Gabriel Lippmann invented “interference color photography,” later called Lippmann holograms. This invention was made...
Photonics.com, September 2013
. . . and Everything in Its Place
Machine vision advances help with sorting tasks in manufacturing. In an automated manufacturing environment, things must be placed accurately and very quickly: Industrial sorters frequently must decide in milliseconds where a blueberry should go....
Photonics Spectra, August 2013
Faster Mold Coating Tests Make Glass Processing More Efficient
Bypassing the time-consuming wear stages of heating and cooling allows quick testing of mold coating lifetimes while increasing efficiency for precision glass molding. Optical components that fulfill complex functions by using complex-shaped...
Photonics Spectra, August 2013
Finding Cancer Cells
As a 17-year-old student at The College Preparatory School in California, Zhang was named a finalist in the Intel Science Talent Search (Intel STS) 2013 for developing a method to help surgeons visualize tumor margins by staining cancer cells...
Photonics Spectra, August 2013
Follower feedback
A member of the SPIE LinkedIn group enjoyed the discussion so much that he added another question. If you have additional advice for Gábor or any of our other readers, please email our managing editor at Laura Marshall, Managing Editor,...
Photonics Spectra, August 2013
Hybrid Fabrication Makes Better Plasmonic Nanostructures for SERS
Monolithic hierarchical plasmonic nanostructures improve results from surface-enhanced Raman spectroscopy. Plasmonic nanostructures of gold and silver have emerged as attractive nanomaterials because of their small size, corrosion resistance,...
Photonics Spectra, August 2013
Improving Cancer Treatment
Improving Cancer Treatment by Arjun Nair An experimental therapy that deploys gold nanoparticles in the fight against cancer won this 16-year-old high school student from Alberta, Canada, top national honors in the 2013 Sanofi Bio-GENEius Challenge...
Photonics Spectra, August 2013
Liaising for Light
As a young girl in the Netherlands, Huisman had a curiosity about the world around her that led her to study physics. That same curiosity now drives the 18-year-old’s interest in photonics, and she’s putting it to good use in her new...
Photonics Spectra, August 2013
Mergers, Acquisitions and More
In past years, we’ve reported from trade shows and conferences that the mood was one of “cautious optimism” that progressed to, as someone said, “restrained exuberance.” Today, the optimism and exuberance are catching...
Photonics Spectra, August 2013
Ones to Watch
Ones to Watch Some bright lights are making very early contributions to photonics. by Laura Marshall, Managing Editor, [email protected] They’re making headlines for solving theoretical and real-world problems – and they...
Photonics Spectra, August 2013
Reader Polls
ABCs of Photonics How about starting a blog or section that caters to grade-school children? We could all participate, and we would hopefully spark interest in young minds. – Bruce Marvin (via Facebook) What technology is on your photonics...
Photonics Spectra, August 2013
STEM Outreach
At 18, Das is the youngest University Medalist in the University of California, Berkeley’s, history; the annual award includes a $2500 scholarship and is given to the year’s top graduating senior. In his mere three years at Berkeley, Das...
Photonics Spectra, August 2013
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