Polarization retaining fiber optic coupler and method

Details Polarization retaining fiber optic coupler and method Polarization retaining fiber optic coupler and method

G - Physics

02

B

88/97.5

G02B 6/26 (2006.01) C03B 37/027 (2006.01) C03B 37/028 (2006.01) G02B 6/10 (2006.01) G02B 6/255 (2006.01) G02B 6/28 (2006.01) G02B 6/44 (2006.01)

Patent

CA 2006352

Abstract of the Disclosure This invention relates to a method of drawing twist-free optical fibers; it is particularly useful for drawing polarization retaining single-mode (PRSM) optical fibers having azimuthal inhomogeneities. In one embodiment, there is applied to the fiber, during the drawing thereof, a coating having a non-circular cross-section, the azimuthal inhomogeneity of the fiber being positioned in a substantially constant orientation with respect to the non-circular cross-section of the coating. In another embodiment, a plurality of fibers having azimuthal inhomogeneities are drawn through the same coater so that the azimuthal inhomogeneity of each fiber is oriented in a substantially constant relationship with respect to the the azimuthal inhomogeneities of the remaining fibers in the coating. The coated PRSM fibers are particularly useful for making polarization retaining fiber optic couplers.

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