Single beam second harmonic generation in isotropic media
AssigneeBell Telephone Laboratories, Incorporated
InventorsJohn E. Bjorkholm, Richard R. Freeman, Richard L. Panock, William E. Cooke
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Abstract
The present invention relates to an apparatus for providing second harmonic generation from a single beam in an isotropic medium. An isotropic medium having a two-photon transition between a first level and a second level with a quadrupole moment therebetween is exposed to a beam of laser radiation. The photons in the laser beam have an energy which is substantially equal to one-half the energy difference between the first and second levels.
Claims5
Apparatus for providing second harmonic generation of radiation in a laser beam which comprises:
- an isotropic medium, disposed to intercept said radiation in said laser beam, said isotropic medium having a two-photon transition between a first level and a second level with a quadrupole moment therebetween, the energy difference between said first and second levels being substantially close to twice the energy of at least a portion of the photons in said laser beam.
Apparatus for providing sum or difference frequency generation of radiation in two collinear laser beams which comprises:
- an isotropic medium, disposed to intercept said radiation in said collinear laser beams, said isotropic medium having a two-photon transition between a first level and a second level with a quadrupole moment therebetween, the energy difference between said first and second levels being substantially close to the sum or difference frequency of at least a portion of the photons in said collinear laser beams.
Dependencies are inferred from the claim text.