Independent Control of One of Normally Interdependent Light Transmission Characteristics of Optical Fiber
Patent, Filed 12 Aug 97, patented 11 May 99
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A method and apparatus for controlling polarization, as one of a pair of interdependent light characteristics of an optical fiber, in response to a time dependent signal without the introduction of any significant variation in phase delay. A pair of transducers compress the optical fiber at spaced locations. When phase of energization of a first transducer in response to the time dependent signal is 180 deg out of phase with the energization of the second transducer, the polarization shifts in response to the time dependent signal without any significant shift is phase delay. When the phases are in phase, phase delay shifts in response to the time dependent signal without any significant shift in polarization. Multiple sets of transducers disposed along the optical fiber enable smooth variation of the controller polarization or phase relay when a first transducer in each set is angularly displaced about the optical fiber by 45 with respect to a first transducer in an adjacent set.
- Fiber Optics and Integrated Optics