Tuning wavelength selective birefringent optical fiber filters using twist birefringence, 1991
Myers, Terry W.
1990-1999
A novel physical tuning mechanism for optical fiber filters is proposed and studied. To explore tuning mechanisms, a theoretical model of a Sole birefringent fiber filter is described. The coherency equation of motion for a birefringent filter is solved by transforming to the Stokes-Mueller matrix equation via the measurable Stokes parameters. The Mueller matrix is then expanded in a Taylor series using the generators of the Lorentz transformations. The Stokes vectors and Mueller matrices provide a theoretical formalism which is used to simulate an experimental set-up and to describe the transmission of light through a birefringent fiber filter system. Hence, the theoretical expression for the transmission spectra incident on a detector is derived. This expression is then transformed to the more convenient fourier series form. This form is used to determine the particular type of perturbation necessary to tune a filter. Specifically, a tuning mechanism utilizing twist birefringence is proposed and analyzed. Moreover, we show using theoretical and computer simulation studies that twist birefringence tunes a filter spectra over a narrow but usable range, provided each stage in the filter is twisted at the same rate. For example, a twist birefringence of 85.7 rad/m generated a 42.8 nm tuning range on the filter spectra of a three-stage Sole-type fiber filter when each optical fiber stage is linearly birefringent with a beat length of 18.94 mm at 1282 nm.
text
application/pdf
1991-05-01
thesis
Master of Science (MS)
Clark Atlanta University
Department of Physics
Brown, Charles S.
Georgia--Atlanta
http://hdl.handle.net/20.500.12322/cau.td:1991_myers_terry_w
