Thulium doped fiber laser operating at 2 μM region

Abstract

All-fiber Tm3+-doped silica fiber laser operating at 2 μm region was demonstrated. The wavelength of the fiber laser can be selected from 1925 nm to 2200 nm by using different fiber Bragg gratings (FBGs) as wavelength selection elements. By employing a FBG arrays in the laser cavity, six switchable lasing wavelengths were achieved. The presented fiber laser can be useful for dense wavelength division multiplexing systems.