Polarization drift elimination fiber wrap design and method

Details Polarization drift elimination fiber wrap design and method Polarization drift elimination fiber wrap design and method

2011-06-28

2011-06-28

Kianni, K. Cyrus (Department: 2883)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Multiple contact type

C335S039000

Reexamination Certificate

active

07969263

ABSTRACT:
A fiber wrap and a method of rotating the fiber wrap without twisting a data cable are disclosed. The fiber wrap includes a sun gear, a sun cylinder coupled to the sun gear, a planetary gear in contact with the sun gear, a planetary cylinder coupled to the planetary gear, an outer housing in contact with the planetary gear, and a data cable coupled to the sun cylinder, the planetary cylinder, and the outer housing. The maximum bend radius of the data cable is determined by the equation:2⁢πΔ⁢⁢DGD⁢cλwherein λ is optical wavelength andΔ⁢⁢DGD=0.5⁢Cs⁡(rR2)2⁢Δ⁢⁢Lc-0.5⁢Cs⁡(rR1)2⁢Δ⁢⁢Lcwherein Csis the stress-optics coefficient, c is the speed of light, R1is the bend radius at the end of the wrap motion, R2is the bend radius at the start of the wrap motion, r is the radii of the sun cylinder and the planetary cylinder, andΔ⁢⁢L=10360⁢2⁢π⁢⁢R2.

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