掺铋SiO2–Al2O3–GeO2光纤的超宽带近红外发光

Abstract

Bi-doped SiO2-Al2O3-GeO2 fiber preforms are prepared by modified chemical vapor deposition (MCVD) and solution doping process.The characteristic spectra of the preforms and fibers are experimentally investigated, and a distinct difference in emission between the two is observed.Under 808-nm excitation, an ultra-broad near-infrared (NIR) emission with full-width at half-maximum (FWHM) of 495 nm is observed in the Bi-doped fiber.This observation, to our knowledge, is the first in this field.The NIR emission consists of two bands, which may be ascribed to the Bi 0 and Bi + species, respectively.This Bi-doped fiber is promising for broadband optical amplification and widely tunable laser.