Cover Story

Recent advances in infrared laser spectroscopy may enable scientists to make accurate, in situ, real-time measurements of the isotopic composition of gas species emitted from volcanoes. more>>

Features

Continuous-Wave, Room-Temperature Quantum Cascade Lasers

Quantum cascade lasers are now capable of continuous-wave, room-temperature, single-frequency operation with large powers. This progress may be translated into many applications, including medical breath analysis and environmental monitoring. more>>


Optical Pumping in Polymer Lasers: Advances and Challenges

Semiconducting or conjugated polymers combine novel semiconducting properties with simple processing. This article explores optical pumping in polymer lasers by highlighting recent advances in ultrafast photonics and the fabrication of polymer laser resonators. more>>


Lasers in Dermatology

Almost as soon as the first laser was invented, physicians aimed its light at the skin. Today, dermatologists use many types of lasers to treat everything from disfiguring birthmarks to the wrinkles of age. more>>