Cover Story

The terahertz regime is rich with potential uses in a variety of sensing, imaging and communications applications. Security screening and broadband communications are among the fields in which researchers predict that THz technology will... more>>

Features

The Optical Design of Gemstones

With the aid of advanced software, optical design is now being applied to the precision cutting and grading of high-quality jewels. more>>


Laser Beam Shaping

Laser beam shaping, the art of controlling the irradiance and phase profile of a laser's output, is an enabling technology used in industrial applications including semiconductor lithography, circuit component trimming and laser printing. more>>


Dynamic Interferometry

Interferometry is a powerful measurement tool. Efforts to reduce the sensitivity of interferometers to vibration could greatly expand the number of fields in which they are employed. more>>


Optical Code Division Multiple Access

Code division multiple access (CDMA) allows multiple users access to limited-bandwidth networks. The Defense Advanced Research Projects Agency has launched an ambitious program aimed at demonstrating technology for an advanced network based on optical CDMA. more>>


Electrically Switchable Bragg Gratings

Electrically switchable Bragg grating technology offers an innovative platform for emerging optical devices in applications ranging from highly reflective flat panel displays to photonic crystals. more>>