Laser wavelength tripler with high quantum efficiency
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United States of America Patent
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Aug 24, 2004
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N/A
app pub date -
Sep 28, 2001
filing date -
Sep 28, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and system for converting a first light beam having a first frequency into a second light beam having a second frequency. A pump photon having (angular) frequency 3.omega. (or 4.omega.) is provided within an optical cavity, defined by two mirrors that are fully reflecting at a frequency 2.omega.. In a first approach, the pump photon is received and down-converted (3.omega..fwdarw.2.omega.+.omega.) by a first nonlinear crystal, and the 2.omega. photon is further down-converted (2.omega..fwdarw..omega.+.omega.) by a second nonlinear crystal), to produce three photons (.omega.+.omega.+.omega.) that exit from the cavity. In a second approach, the pump photon is received and down-converted (4.omega..fwdarw.2.omega.+2.omega.) by a first nonlinear crystal, and one or both of the 2.omega. photons is further down-converted (2.omega..fwdarw..omega.+.omega.) by a second nonlinear crystal).
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