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Updated: Jan 11, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Published on: November 22, 2019

有效的高功率连续波多板Fe:ZnSe激光在4.1μm.

NoSoung Myoung, Sangmi Na, Seong Ku Lee

|November 11, 2025

概括

这项研究表明,一个高效率的冷冷却铁化 (Fe2+:ZnSe) 激光器在4.167μm连续运行. 这种新的四块板设计实现了接近衍射限制的光束质量和高效的中红外功率缩放.

科学领域:

中红外激光技术的中红外激光技术.
固态激光器的开发.
材料科学用于光电子学.

背景情况:

高效的中红外线 (MIR) 激光器对于各种应用至关重要,包括光谱学,自由空间通信和医学诊断.
铁化化 (Fe2+:ZnSe) 晶体是MIR激光器的有希望的增益介质,因为它们的辐射带宽很宽.
在MIR激光器开发中的挑战包括热管理和实现高功率输出.

研究的目的:

报告低温冷却Fe2+:ZnSe激光器的高效连续波 (CW) 运行情况.
研究一种新的四板配置,以优化吸收和增强分布.
为了证明有效的中红外功率扩展和评估光束质量.

主要方法:

使用了四块Fe2+:ZnSe配置 (每块2.75毫米),其兴奋剂度为4.37.9 × 10^18 cm^-3.
将激光系统冷却到90K以获得最佳性能.
采用2.832微米的双端,使用两个纤维散装混合Cr:ZnSe激光器 (17W和13W).

主要成果:

实现了完全的吸收 (ηa ≈ 99.68%) 并提供了13.9W的输出功率.
获得了41%的高斜率效率.
证明了接近衍射限制的光束质量 (Mx2=1.13±0.11,My2=1.24±0.12) 和观察到的波长红移从4.036到4.167微米随着功率的增加.

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结论:

低温冷却的Fe2+:ZnSe激光器在四块板配置中提供高效率和良好的光束质量.
该架构有效地减轻了热透镜,使得有效的中红外功率扩展成为可能.
这种方法促进了强大可靠的MIR激光源的开发.