ERBIUM-DOPED OPTICAL FIBER AND OPTICAL FIBER LASER

摘要

PROBLEM TO BE SOLVED: To provide an erbium-doped optical fiber that can obtain a high laser output with a relatively short length, and to provide an optical fiber laser.;SOLUTION: The erbium-doped glass fiber is a multimode fiber having a core of ≥20 μm in diameter and, in addition, the total doped amount of erbium is adjusted to ≥9.0×10¹⁶ in the number of atoms. The optical fiber laser is a 2.8-μm-band optical fiber laser using an erbium-doped glass fiber as a gain medium. The glass fiber used in the laser is a multimode fiber having a core of ≥10 μm in radius, and the total doped amount of erbium is adjusted to ≥9.0×10¹⁶ in the number of atoms.;COPYRIGHT: (C)2005,JPO&NCIPI