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Thomas M. HAUFF Albrecht M. OEHLER Matthias MORATZKY Walter E. HEINLEIN Werner STIEB Johann SCHULTE
A three-cladding DFSMF, Ge -and F-doped single-mode fiber was optimized with regard to fabrication tolerances and low bending loss. DFSMF cables and fused DFSMF couplers were realized for use in a low-loss WDM network. A modified refracted near-field technique for the measurement of fused-section refractive-index profiles was developed.