Optical polarisation state controllers

Details Optical polarisation state controllers Optical polarisation state controllers

1991-03-19

1992-05-19

Ullah, Akm E.

Optical waveguides

Optical waveguide sensor

385 11, G02B 602, G02B 626

Patent

active

051154803

ABSTRACT:
A planar coil of single mode fiber has opposed ends twisted into orthogonal planes to form a non-planar coil 20 exhibiting circular birefringence. The amount of birefringence exhibited is modulated by means of an electromechanical transducer 34 which controls the distance separating two diametrically opposed portions of the coil. Two or more such controllers may be formed in tandem with intervening additional coils 50 providing quarter-wave linear birefringence.

REFERENCES:
patent: 4389090 (1983-06-01), Le Fevre
patent: 4495411 (1985-01-01), Rashleigh
patent: 4697876 (1987-10-01), Dyott
patent: 4793678 (1988-12-01), Matsumoto
patent: 4799752 (1989-01-01), Carome
patent: 4915468 (1990-04-01), Kim et al.
patent: 4960319 (1990-10-01), Dankowych
Electronics Letters, vol. 16, No. 20, 25 Sep. 1980, pp. 778-780.
Journal of Lightwave Technology, vol. 8, No. 3, Mar. 1990, pp. 438-458.

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