Two-photon-absorption magneto-optic dispersion spectrometer

Details Two-photon-absorption magneto-optic dispersion spectrometer Two-photon-absorption magneto-optic dispersion spectrometer

2011-01-25

2011-01-25

Connolly, Patrick J (Department: 2877)

Optics: measuring and testing

By light interference

Spectroscopy

C356S491000

Reexamination Certificate

active

07876445

ABSTRACT:
A tunable optical spectrometer is disclosed that includes a medium configured to perform polarization rotation within a frequency band on a linearly polarized test beam, wherein the medium is circularly birefringent, and wherein the polarization rotation is achieved based on two-photon-absorption. The medium includes a gaseous substance, a reference laser beam of circular polarization and a longitudinal magnetic field. The test beam propagates through the medium twice, once in the same direction as the magnetic field, and once in the opposite direction of the magnetic field. The test beam undergoes polarization rotation an amount that depends upon the frequency of the test beam.

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