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Research on the Influence of Refractive Index Distribution of Ytterbium-doped Fiber Core on Stable Laser Output Power
- Study on Optical Communications Issue 3, (2025)
- 作者机构：
1.中天科技精密材料有限公司，江苏 南通 226009
2.复旦大学 信息科学与工程学院，上海 200433
- 作者简介：
- 基金信息：
DOI：10.13756/j.gtxyj.2025.240057
CLC： TN244Received：06 March 2024，
Revised：22 May 2024，
Published：10 June 2025
- 稿件说明：
移动端阅览
秦钰，张俊逸，丁松，等. 掺镱光纤芯层折射率对激光输出功率影响研究[J]. 光通信研究，2025(3): 240057.
Qin Y, Zhang J Y, Ding S, et al. Research on the Influence of Refractive Index Distribution of Ytterbium-doped Fiber Core on Stable Laser Output Power[J]. Study on Optical Communications, 2025(3): 240057.
秦钰，张俊逸，丁松，等. 掺镱光纤芯层折射率对激光输出功率影响研究[J]. 光通信研究，2025(3): 240057. DOI： 10.13756/j.gtxyj.2025.240057.
Qin Y, Zhang J Y, Ding S, et al. Research on the Influence of Refractive Index Distribution of Ytterbium-doped Fiber Core on Stable Laser Output Power[J]. Study on Optical Communications, 2025(3): 240057. DOI： 10.13756/j.gtxyj.2025.240057.
摘要
【目的】
2
随着20/400掺镱有源光纤输出功率的不断提升，增益光纤内易发生横向模式不稳定（TMI）效应，导致激光稳定输出达到功率瓶颈。研究不同20/400掺镱有源光纤芯层折射率分布（RIP）情况下的光纤激光输出差异并获得最佳RIP参数，对突破1 080 nm激光TMI相关功率限制意义重大。
【方法】
2
文章通过理论分析了不同芯层RIP设计下的光学模式分布情况，并以此调控改进化学沉积（MCVD）工艺，制备了多组不同RIP斜率的20/400掺镱有源光纤，并通过全正向泵浦光纤振荡系统验证得到最佳RIP斜率。
【结果】
2
结果表明，稳定输出功率及斜效率随着RIP斜率的增加均呈现先增后降的趋势。当RIP斜率为0.088 4时，可获得最大稳定激光输出功率为2 030 W、最高斜效率为82.87%。
【结论】
2
0.088 4为20/400掺镱有源光纤最佳芯层RIP斜率设计值，该设计下的增益光纤具有更高的稳定激光输出功率及斜效率。
Abstract
【Objective】
2
As the output power of 20/400 ytterbium-doped active fiber increases
the Transverse Mode Instability (TMI) effect in the gain fiber is likely to be excited
posing a bottleneck to the laser's stable output power. Therefore
it is of great significance to investigate the differences in output power with various Refractive Index Profiles (RIP) in the core of ytterbium-doped active fiber and to obtain the optimal RIP parameters
which will help break through the TMI-related output power limit at 1 080 nm.
【Methods】
2
This research theoretically analyzed the optical mode distributions for various RIP designs. Based on these analyses
the Modified Chemical Vapor Deposition (MCVD) process was adjusted to fabricate multiple 20/400 ytterbium-doped active fibers with different RIP slopes. Through experimental investigation using a forward-pumped fiber oscillator
the optimal RIP slope was determined.
【Results】
2
The experimental results demonstrate that both the stable output power and slope efficiency initially increase and then decrease as the RIP slope increases. When the RIP slope is 0.088 4
the maximum stable laser output power of 2 030 W and the highest slope efficiency of 82.87% are achieved.
【Conclusion】
2
The optimal RIP slope of the designed ytterbium-doped active fiber is 0.088 4
which has a higher stable laser output power and slope efficiency.
关键词
Keywords
references
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