Interferometric technique for measurement of nonreciprocal optic

Details Interferometric technique for measurement of nonreciprocal optic Interferometric technique for measurement of nonreciprocal optic

1991-06-27

1993-08-10

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356345, G01B 902

Patent

active

052354040

ABSTRACT:
A method and apparatus for measuring nonreciprocal optical effects contemplates directing two circularly polarized optical beams having a known phase relation to each other at a sample, and detecting the difference in phase between the two beams after they have encountered the sample. In a transmission measurement the two circularly polarized beams have the same handedness, but pass through the sample in opposite directions. In a reflection measurement, the two circularly polarized beams have opposite handedness, but encounter the sample in the same direction. In a particular embodiment of the invention a linearly polarized beam is introduced into a Sagnac interferometer and split into two linearly polarized beams which are ultimately recombined.

REFERENCES:
S. Spielman et al., "Test for Nonreciprocal Circular . . . ", The American hysical Society, Jul. 1990, pp. 123-126.
"Magnetooptics", McGraw-Hill Enc. of Science and Technology, 6th Ed., 1987, vol. 10, pp. 335-336.
"Hall Effect", McGraw-Hill Enc. of Science and Technology, 6th Ed., 1987, vol. 8, pp. 296-297.
U. Durig et al., "Near-Field Optical-Scanning Microscopy", J. Appl. Phys., May 1988, vol. 59, No. 10, pp. 3318-3327.
A. A. Michelson et al., "The Effect of the Earth's Rotation . . . ," Nature, vol. 115, No. 2894, Apr. 1925.
R. White et al., "Long Range Order in Solids", Academic Press, 1979, pp. 317-323.
S. Spielman et al., "Test for Nonreciprocal Circular Birefringence in YBa.sub.2 Cu.sub.3 O.sub.7 Thin Films as Evidence for Broken Time-Reversal Symmetry", Physical Review Letters, vol. 65, No. 1, Jul. 2, 1990.

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