Patent
1976-01-05
1977-08-09
Corbin, John K.
350160R, B01F 101
Patent
active
040407187
ABSTRACT:
An optical polarization rotator is implemented without any magnetic field by using dispersion due to two-photon transitions. The polarization rotator is useful for powerful coherent linearly-polarized optical beams. A second powerful circularly-polarized coherent optical beam provides control for the polarization rotation of the linearly-polarized beam which interacts more strongly with the oppositely circularly-polarized component of the first beam than with the other component of the first beam. The difference in interaction occurs because the gaseous medium atoms in the cell in which the interaction occurs begin and end a nearby resonance transition that determines the two-photon dispersion in the same angular momentum state; and, because of this quantum state selection rule, the result is a relative delay between the two circularly-polarized components of the linearly-polarized beam and a consequent rotation of the orientation of linear polarization.
REFERENCES:
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Liao et al., "Polarization Rotation Induced by Resonant Two-Photon Dispersion" Phys. Rev. Lett. Mar. 15, 1976, pp. 584-587.
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Bjorklund Gary Carl
Liao Paul Foo-Hung
Bell Telephone Laboratories Incorporated
Caplan David I.
Corbin John K.
Punter Wm. H.
Wisner Wilford L.
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