Ultra-broad near-infrared emission of Bi-doped SiO_2 Al_2O_3 GeO_2 optical fibers

• 作 者: 吴金东 陈丹平 吴兴坤 邱建荣
• 机 构: State Key Laboratory of Modern Instruments, Department of Optical Engineering, Zhejiang University,Z
• 出 处: Chinese Optics Letters
• 发表日期: 2011年07期
• 关键词: tunable FWHM bands doping excitation broadband amplification pumping luminescenc

Bi-doped SiO 2 –Al 2 O 3 –GeO 2 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.

Bi-doped SiO 2 -Al 2 O 3 -GeO 2 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 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 , 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.