[Federal Register: May 3, 1999 (Volume 64, Number 84)]
[Notices]               
[Page 23605]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr03my99-30]

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DEPARTMENT OF COMMERCE

 
National Institute of Standards and Technology

AGENCY: National Institute of Standards and Technology Commerce.

ACTION: Notice of government owned invention available for licensing.

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SUMMARY: The invention listed below is owned in whole or in part by the 
U.S. Government, as represented by the Department of Commerce. The 
Department of Commerce's ownership interest in the invention is 
available for licensing in accordance with 35 U.S.C. 207 and 37 CFR 
Part 404 to achieve expeditious commercialization of results of 
Federally funded research and development.

FOR FURTHER INFORMATION CONTACT: Technical and licensing information on 
this invention may be obtained by writing to: National Institute of 
Standards and Technology, Technology Partnerships Program, Stop 2200, 
Gaithersburg, MD 20899-2200; Fax 301-869-2751. Any request for 
information should include the NIST Docket No. and Title for the 
relevant invention as indicated below.

SUPPLEMENTARY INFORMATION: NIST may enter into a Cooperative Research 
and Development Agreement (``CRADA'') with the licensee to perform 
further research on the invention for purposes of commercialization. 
The invention available for licensing is:
    NIST Docket Number: 97-044US.
    Title: Multi-Wavelength Cross-Correlator For Ultrashort Radiation 
Pulses.
    Abstract: This invention is jointly owned by the U.S. Government, 
as represented by the Secretary of Commerce, and the University of 
Colorado. The measurement of cross correlations and time delays between 
ultrashort laser pulses of widely different tunable wavelengths has 
been demonstrated in a greatly simplified device employing 
semiconductor photodiode materials. Two-color, two-photon induced 
photoconductivity in a commercial GaAsP photodiode is used for the 
first time to obtain femtosecond cross-correlation functions for 
different wavelength pairs. The invention requires no non-linear 
crystals, no phase matching and no separate detector, as is the case 
for conventional optical cross-correlation measurements. In the 
invention, zero time delays and accurate cross correlations were 
measured for 100 femtosecond laser pulses of dramatically different 
wavelengths, e.g. 775 nm and 1300 nm. The only restriction for 
applicable wavelengths is that the sum of the photon energies of the 
two incident laser beams is above the band gap energy of the 
semiconductor.

Karen H. Brown,
Deputy Director.
[FR Doc. 99-11002 Filed 4-30-99; 8:45 am]
BILLING CODE 3510-13-M