Abstract

Rare-earth doped silica fibers have been extensively developed as optical amplifiers. Especially, Er³⁺ doped silica fibers have been expected of those at 1.55 μm band^{[1] [2]} and increasing effort has been made to improve the gain and gain-bandwidth of amplification. And the fluoro-zirocnate multi-mode fiber has been also investigated for optical amplification.^[3] But, there is no report of Er doped fluoro-zirconate sinle-mode fiber for 1.55μm amplification. In this time, we fabricated Er³⁺ doped fluoro-zirconate fibers and evaluated these fluorescence spectrum and life-time and amplification properties comparing with Er³⁺ doped silica fiber.

© 1990 Optical Society of America