Fiber optic polarization controller

Details Fiber optic polarization controller Fiber optic polarization controller

1986-05-20

1988-12-27

Sikes, William L.

350 9620, 350 9629, 350400, G02B 626, G02B 602, G02B 530

Patent

active

047936789

ABSTRACT:
This invention relates to a fiber optic polarization controller which controls the polarization direction of the light propagating through an optical fiber by curving a single-mode fiber within an imaginary plane S to generate birefringence on the fiber and by rotating the plane S defined with the thus curved portion. The invention aims to prevent twists of the optical fiber which are caused in rotating the plane S by rotating the fiber in one direction from the plane S simultaneously with the rotation of the plane S and correspondingly to the angle thereof. The optical fiber may be rotated either by utilizing the stability of fiber which is held loosely at a curved portion or by forcibly rotating the curved portion from outside.

REFERENCES:
patent: 4239333 (1980-12-01), Dakss et al.
patent: 4389090 (1983-05-01), LeFevre
patent: 4529262 (1985-07-01), Ashkin et al.
"Polarization Controller Can Maintain Light Polarization in Single Mode Fiber" by Laser Focus, Feb. 1981, pp. 58,62.
"Polarization Stabilization on Single-Mode Fiber" by Ulrich, Appl. Phys. Lett. 34(11), Dec. 1, 1979.
"Single-Mode Fiber-Optical Polarization Rotator" by Ulrich et al., Appl. Optics, vol. 18, No. 11, Jun. 1, 1979, pp. 1857-1861.
"Single-Polarization Single-Mode Optical Fibers" by Okoshi IEEE J. of QE, vol. QE-17, No. 6, Jun. 1981.
"Polarization in Optical Fibers" by Kaminow, IEEE Journal of QE, vol. QE-17, No. 1, Jan. 1981, pp. 15-22.
"Polarization-Independent Optical Circulator: an Experiment" by Matsumoto et al., Applied Optics/vol. 19, No. 1/Jan. 1980.
Okoshi, Electronics Letters, vol. 21, No. 20, pp. 895-896.
Matsumoto, Electronics Letters, vol. 22, No. 2, pp. 78-79.

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