Abstract
By multi-stage rod-in-tube fiber drawing process, a single-mode fluorotellurite glass fiber was fabricated and reported for the first time. Benefiting from chemical–physical dehydration process to remove water and OH− groups, the propagation loss was decreased to 1.9dB/m at 1550nm and the infrared window is extended from 2.8μm to 4.2μm, i.e. a new kind of mid-infrared glass fiber. The fiber is with a small core of 3.52μm in diameter to meet single-mode condition, and the effective nonlinear parameter γ was estimated to be 236.7W−1km−1 at 1550nm by using continuous-wave self-phase modulation method. © 2015 Elsevier B.V. All rights reserved.
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