Method for producing twisted optical fiber with reduced polarization mode dispersion
AssigneeSterlite Optical Technologies Ltd.
InventorsSangeeta Mohanty, Nacham Sridhar, Salaj Sinha, Nitesh Gulati, Sthitadhi Das
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Abstract
A method for drawing an optical fiber having reduced polarization mode dispersion (PMD) draws an optical fiber from an optical fiber preform whose core ovality is at max about 3%, coats the optical fiber with acrylic polymer and twists the coated optical fiber with a pair of spinning wheels. The twisting of the fiber is achieved by four discrete spin rates that repeat in a periodic fashion after the drawing of certain lengths of the optical fiber. At least one of the spin rates varies in a trapezoidal manner along the respective one of drawn lengths of the optical fiber.
Claims13
A method for drawing an optical fiber having reduced polarization mode dispersion (PMD) comprising the steps of:
- a) drawing an optical fiber from an optical fiber preform whose core ovality is at max about 3%;
- b) coating the said optical fiber with acrylic polymer;
- c) twisting the said coated optical fiber with a pair of spinning wheels;
- d) the step of spinning the fiber is characterized by that
- (i) the spin function used to spin the fiber is a combination of four discrete spin rates which repeat itself in a periodic fashion after a certain length of fiber drawn;
- and
- (ii) the spin rate of each spin function varies in a trapezoidal manner along the drawn length of the fiber.
The single mode optical fiber made in accordance with the method of any of the preceding claims.
A method for drawing an optical fiber having reducing polarization mode dispersion (PMD) substantially as hereinbefore described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.