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Fabrication of fluoride glass single-mode fibers

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3 Author(s)
Ohishi, Y. ; Nippon Telegraph and Telephone Public Corp., Ibaraki-ken, Japan ; Mitachi, S. ; Takahashi, S.

Single-mode optical fibers are obtained using ZrF4-based fluoride glasses. The fibers are drawn from a preform and jacketing tube. The preform with cladding/core ratio of 5.1 is made by using a built-in casting method. The cutoff wavelength of the fiber is experimentally determined to be 2.7 μm by bending loss measurement. Minimum transmission loss of the obtained fiber is 160 dB/km at a wavelength of 3.28 μm. The V -value at this wavelength is estimated to be 2.03 from the core diameter and the refractive index difference.

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Lightwave Technology, Journal of  (Volume:2 ,  Issue: 5 )