Abstract: Methods and apparatuses negate a measured mechanical twist of an optical fiber by introducing a counteracting twist to bring the net mechanical twist closer to zero, which reduces the fiber's polarization mode dispersion (PMD). A spool of optical fiber having undesirable mechanical twist is mounted and fiber is drawn from the end of the spool to impart a specified counteracting mechanical twist. Additionally, the spool may be controllably rotated by a control system while optical fiber is drawn there from, allowing the system to generate a precise amount of counteracting mechanical twist in the fiber.
Type:
Grant
Filed:
September 26, 2002
Date of Patent:
April 25, 2006
Assignee:
Fitel USA Corp.
Inventors:
Gene Kent Weeks, Stephen Mast, Zhi Zhou, John F. Ryan, III, Harry Douglas Garner, Jr., Siu-Ping Hong, John Popwell, Alan H. McCurdy