Abstract

Rare-earth ion-doped optical fibers¹ are drawing wide attention as the functional fibers applicable to fiber lasers, fiber amplifiers, and fiber-optic sensors. A technique to uniformly dope a high content of rare-earth ions was considered, and a high Nd³⁺ content low-loss single-mode fiber was developed by using the vapor phase axial deposition (VAD) method and the molecular stuffing technique.² in which a VAD soot preform is impregnated with an alcohol solution of high-rare-earth ion content.

© 1988 Optical Society of America