Cover Story

Scientists use two-photon absorption fluorescence to recover written information on Roman relics and solve a 2,000-year-old mystery. more>>

Features

Photonic Crystal Fiber: Finding the Holey Grail

Photonic crystal fiber permits much wider adjustment of key characteristics such as modal phase index, dispersion, nonlinearity and birefringence than is possible in conventional fiber. more>>


Improved Interferometric Optical Testing

Modern electronics, computers and software are changing the ways that interferometry can be used and broadening its metrology applications in industrial and research labs. more>>


The Breakthrough Birth of the Diode Laser

The birth of the diode laser 45 years ago happened very quickly. Decades after the discovery of LEDs, a key experiment showed that diode junctions could emit efficiently. Within four months, four groups had crossed the threshold. By Jeff Hecht more>>


Breaking Barriers to Innovation: Report from CLEO/QELS and PhAST 2007

Thousands of scientists, engineers and executives converged in Baltimore in May to learn about the latest innovations in lasers and photonics. more>>