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Photo-induced birefringence in optical fibres : a comparative study of low-bi and hi-bi fibres

By S. Bardal, A. Kamal and P.St.J. Russell


A study of photoinduced birefringence in bow-tie (stress-induced) high-birefringence (Hi-Bi) and low-birefringence (Lo-Bi) germanosilicate optical fibers is conducted by using 532-nm light. The study reveals that Hi-Bi fibers are insensitive to light polarized along the fast axis, in contrast to Lo-Bi fibers, which are photosensitive along both axes. The induced birefringence in Lo-Bi fibers is reversible, whereas the change in Hi-Bi fibers is permanent. The sign of the induced birefringence is established experimentally for the first time to our knowledge, and the significance of the results to models based on stress and/or glass defects is briefly discussed

Topics: QC, TK
Year: 1992
OAI identifier: oai:eprints.soton.ac.uk:78350
Provided by: e-Prints Soton

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