A technique for the pseudo-depolarization of a long-coherence length source is described, which is based on a simple polarization modulation scheme. Using a length of high birefringence fiber wound on a piezoelectric transducer, a simple all-fiber polarization scrambler can be constructed. Details of an electro-optic scrambler are also reported. The depolarization technique is shown to eliminate the effects of input-lead-birefringence induced polarization fading in interferometric sensors.
A D. Kersey,
M. J. Marrone,
"Single-Mode Fiber Pseudo-Depolarizer", Proc. SPIE 0838, Fiber Optic and Laser Sensors V, (23 March 1988); doi: 10.1117/12.942534; https://doi.org/10.1117/12.942534