An analysis of modal noise in multimode optical fibers was performed. Both spatial and time varying modal noises were analyzed. The time varying modal noise was g.enerated in two ways: the first, by vibrating the optical fiber, the second, by varying the temperature of the optical fiber. Under controlled conditions the temperature of the optical fiber varied between 68°F to 200°F while the fiber was held stationary. The optical fiber was then vibrated while the temperature was held constant. Data indicated that the modal noise statistics agreed with the Beta distribution. The statistics of the spatial modal noise were measured and were then compared to the time varying modal noise. These statistical moments disagreed with the Beta statistics. This indicated that modal noise generated in optical fibers is possibly a non-ergodic process. Next the optical fiber's spatial auto-correlation function and spatial intensity fade statistics were computed.
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Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Masters Thesis (Open Access)
Weeks, Arthur R., "An Analysis of Modal Noise in Multi-Mode Optical Fibers" (1983). Retrospective Theses and Dissertations. 5129.