OPN January 2008

Cover Story

High-Brightness LEDs

William J. Cassarly

High-brightness LEDs offer cost-effective, energy-efficient lighting solutions across the entire visible spectrum. more>>


Integrated Optical Devices in Lithium Niobate

Wolfgang Sohler, Hui Hu, Raimund Ricken, Viktor Quiring, Christoph Vannahme, Harald Herrmann, Daniel Büchter, Selim Reza, Werner Grundkötter, Sergey Orlov, Hubertus Suche, Rahman Nouroozi and Yoohong Min

Researchers have developed an array of new optical devices based on lithium niobate, including waveguide structures, electro-optical wavelength filters and polarization controllers, lasers with remarkable properties, nonlinear frequency converters of exceptional efficiency, ultrafast all-optical signal processing devices and single photon sources. more>>

Report from FiO/LS 2007: Crystallizing the Future of Optics

Patricia Daukantas

Frontiers in Optics (FiO) 2007, OSA’s 91st annual meeting, brought the latest research in optics and photonics to San Jose, Calif. Among other topics, the conference focused on nanophotonics and photonic crystals, optical materials, optics for energy production and biomedical applications. more>>


Fine-Tuned Lasers Zap Deadly Germs

Patricia Daukantas

An interdisciplinary group of researchers is studying new ways to kill disease-causing viruses with a visible-light femtosecond laser. more>>

Lab-on-a-Chip Integrates Microfluidics, Optical Traps

Patricia Daukantas

In a new type of “lab-on-a-chip” technology, particles in a microfluidic system are sorted by light. more>>

Did You Know?

Patricia Daukantas

LEDs make Rockefeller Center shine. more>>



Changing Perceptions About Optics

Angela Stark

A new OSA Foundation-sponsored exhibit was designed to change students’ perceptions about light and vision—literally and figuratively. more>>

Optical Engineering

Lens Performance Budgeting Using the Hopkins Ratio

Craig Olson

The Hopkins ratio provides a mathematically rigorous link between the two metrics that are most often used to specify a lens: the root-mean-square wavefront error (WFE) and the modulation transfer function (MTF). This ratio can be used to develop WFE budgets that provide insight into MTF performance. more>>

Optics Innovations

Oxxius: Seeing the light toward laser solutions.

Thierry Georges

After the telecom bubble burst, laser technology beckoned for the founder of this early-stage company in France. more>>