Researchers at the National Institute of Standards and Technology (NIST) are working on the following technologies. For further information, contact the: National Institute of Standards and Technology, Office of Technology Partnerships, 100 Bureau Drive, Stop 2200, Gaithersburg, Maryland 20899; Fax: 301-975-3482. ***This is not an announcement of a contract action or a grant.*** Description: A high-resolution, broadband spectroscopy system has been demonstrated based on fiber-laser frequency combs, whose output forms a comb of lines spanning a wide optical spectrum. The output of a frequency comb is sent through a gas cell. A second phase-locked comb is then mixed with the transmitted comb, to produce a comb of rf heterodyne beat signals. Each rf beat signal provides the relative absorption and phase shift of the gas at a specific wavelength.

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