The QC laser was invented five years ago by Federico Capasso and Jerome Faist at Bell Labs, and commercial applications are now being explored in areas like environmental sensing, pollution monitoring, combustion diagnostics, collision avoidance, radar, and medicine. Gmachl, Bell Labs researcher Alessandro Tredicucci, and Edward Whittaker of Stevens Institute of Technology, in New Jersey, will each present an additional APS technical paper related to QC-laser technology. A QC laser's wavelength is determined by several factors. In use, adjusting the temperature or the electrical current applied to the laser changes its wavelength. They are among numerous laser innovations from Bell Labs, where 41 years ago Arthur Schawlow and Charles Townes invented the laser - one of the century's greatest inventions.
Semiconductor lasers are now the most widely used and versatile class of lasers.
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