Methods of and apparatus for tuning a birefringent optical filte

Details Methods of and apparatus for tuning a birefringent optical filte Methods of and apparatus for tuning a birefringent optical filte

1985-11-04

1987-07-07

Punter, William H.

G02B 2728

Patent

active

046782877

ABSTRACT:
The simultaneous and equal tuning of two birefringent crystal elements of a Solc type optical filter by pairs of quarter-wave plates adjacent to each and oriented such that equal and opposite physical rotations between the plates of each pair tunes its adjacent birefringent element in the same direction without changing the relative orientations of the filter input and output. Also, the simultaneous and equal tuning of two birefringent crystal elements of a Solc type optical filter by the rotation of a single contiguous group of optical components.

REFERENCES:
Evans, J. W., "The Birefringent Filter", Jr. Opt. Soc. America, vol. 39, 3-1949, pp. 229-242.
Title et al, "Tunable Birefringent Filters", Optical Engineering, 11/12-1981, vol. 20, pp. 815-823.
Lotspeich et al, "Electro-Optic Tunable Filter", Optical Engineering, 11/12-1981, vol. 20, pp. 830-836.
Gunning, W. J., "Electro-Optically Tuned Spectral Filters: A Review", Optical Engineering, 11/12-1981, vol. 20, pp. 837-845.
Kimura et al, "Birefringent Branching Filters for Wideband Optical FDM Communications", App. Optics, 2-1973, pp. 373-379.

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