Cover Story

Applications and Outlook for Electronic Terahertz Technology

Daniel van der Weide

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

José M. Sasián, Peter Yantzer and Tom Tivol

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

Fred M. Dickey

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

James C. Wyant

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

Jagdeep Shah

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

Gregory P. Crawford

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>>