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U.S. Department of Energy
Office of Scientific and Technical Information

Stimulated anti-stokes raman up-converter

Patent ·
OSTI ID:5487146
An anti-Stokes Raman up-converter is disclosed which is capable of up-converting a variety of conventional laser sources. A metal-halide, for example, thallium chloride or thallium iodide, is employed as a lasing medium, and is photodissociated to create a population inversion in a metastable state of the metal ion. An excimer laser, for example, and ArF* or KrF* excimer laser, may be employed to photodissociate the metal-halide in accordance with the present invention. Alternatively, an excimer flashlamp, for example a ArF* or KrF* flashlamp, may be employed to photodissociate the metal-halide in accordance with the present invention. A conventional laser source, for example, a CO/sub 2/ laser or any harmonic of a Nd:YAG laser, is subsequently employed to pump the population inversion from the metastable state to a virtual level near an intermediate state. Anti-Stokes Raman lasting occurs from this virtual state, where the lasting frequency is greater than the frequency of the conventional laser pump source.
Assignee:
AT and T Bell Laboratories
Patent Number(s):
US 4504949
OSTI ID:
5487146
Country of Publication:
United States
Language:
English