Systems and methods for forming ultra-low PMD optical fiber...

Details Systems and methods for forming ultra-low PMD optical fiber... Systems and methods for forming ultra-low PMD optical fiber...

2005-02-22

2005-02-22

Sanghavi, Hemang (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

C385S124000, C065S402000, C065S438000, C065S504000

Reexamination Certificate

active

06859596

ABSTRACT:
A system and method is disclosed for manufacturing single mode optical fiber which incorporates a spin in the molten fiber during manufacturing. The introduction of spin minimizes a form of distortion called polarization mode dispersion (PMD) and varying the spin, i.e. changing its characteristics, is known to further reduce PMD. However, introducing spin on a molten fiber may result in also introducing twist on the fiber. Twist is a non-permanent rotational force on the cooled fiber which causes stress and is to be avoided. A spin function is disclosed that not only contains a high degree of variability for reducing PMD, but also ensures that mechanical twist on the fiber is minimized, thus reducing stress on the fiber. The spin function modulates either the amplitude, frequency, or both, at the beginning of a cycle to minimize twist on the fiber.

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Franco Cocchini, A. Mazzotti, A. Ricco, and A, Rossi;On-Line Fiber Spinning Monitoring for Low PMD Optical Fibers; Proceedings of the 49thInternational Wire and Cable Symposium, Atlantic City, N.J., Nov. 13-16, 2000.

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