研究目的
Investigating the broadband amplified spontaneous emission (ASE) from Bismuth doped optical fibers (BDFs) under 533nm core-pumping excitation technique and exploring the potential for developing visible-to-NIR lasers using such fibers.
研究成果
The study successfully demonstrated broadband ASE from BDFs under 533nm pumping, highlighting the potential for developing visible-to-NIR lasers. However, achieving lasing requires addressing the challenges of pump light guidance and loss mechanisms in the fibers.
研究不足
The study faced challenges in achieving lasing in the visible-to-NIR region with BDFs, attributed to issues like unsaturable loss growth and poor guidance of pump light in higher-order modes. The presence of a central dip in the refractive index profiles of the fibers also posed a technological problem.
1：Experimental Design and Method Selection:
The study involved the fabrication of BDFs through MCVD process and solution doping technique, using Bi-, Yttrium/Lithium co-doped phosphosilicate and germanosilicate glasses as core materials. The ASE was measured under 533nm core-pumping excitation.
2：Sample Selection and Data Sources:
BDFs with different core materials (BYPS, BYGS, BLGS) were selected based on their potential for visible-to-NIR emission. The absorption spectra and ASE were measured using specific setups.
3：List of Experimental Equipment and Materials:
A single mode 533nm laser, Nufern S460-HP fiber, white light source, USB-based visible detector, and other optical components were used.
4：Experimental Procedures and Operational Workflow:
The ASE from BDFs was measured using a linear Fabry-Perot cavity setup. The optimal fiber lengths for maximum ASE were determined.
5：Data Analysis Methods:
The modal analysis was performed using Optifiber software to understand the light propagation modes in the fibers.
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