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Changing multimode dispersive fibers into single-mode fibers by annealing and guided mode analysis of annealed fibers

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2 Author(s)
Nishimura, J. ; Osaka Electro-Commun. Univ., Japan ; Morishita, K.

Dispersive fibers whose refractive index differences change greatly with wavelength are fabricated from optical glasses with different index dispersions. The fibers have several guided modes, and are changed into single-mode fibers by annealing under suitable conditions. The number of guided modes is investigated by measuring the bending loss and the mode lines of annealed dispersive fibers. The annealed single-mode fibers support only the fundamental mode over broad spectral ranges and no second guided mode at any wavelength

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Lightwave Technology, Journal of  (Volume:16 ,  Issue: 6 )