Graduate Thesis Or Dissertation

 

Rotation of polarization in single mode optical fibers and its relation to Berry's Phase Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/08612r64r

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  • The polarization state of light in a single mode optical fiber may be changed by linear and circular birefringence intrinsic to the fiber or introduced by stress in the fiber due to external pressure, bends or twists. Rotation of polarization may also occur in the absence of any intrinsic or stress induced birefringence, if the fiber is bent into a nonplanar curve. Such rotation depends purely on the path of the fiber and is therefore known as geometric or topological rotation of polarization. An experiment was carried out to measure this geometric rotation of polarization by laying the fiber in different helical paths. Measurements of polarization rotation were made for each of twelve different fiber helices. A personal computer was used for experimental control and data acquisition. The theory of the geometric rotation of polarization can be explained using classical electrodynamics, and an independent quantum mechanical treatment based on Berry's topological phase. Both theories are discussed in this work. The experimental results were compared with both theories and agreement with both was obtained.
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