Passively harmonic mode-locked erbium-doped fiber laser with a gold nanofilm saturable absorber

IF 2.8 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Express Pub Date : 2024-03-20 DOI:10.1364/ome.521096

Changjian Lv, Fanchao Meng, Tianqi Zhang, Junjie Wang, Qi Yan, Zhixu Jia, Weiping Qin, and Guanshi Qin

引用次数: 0

Abstract

We demonstrate a 1.5 GHz harmonic mode-locked erbium-doped fiber laser by incorporating gold nanofilm as a saturable absorber (SA). The high-quality gold nanofilm SA fabricated by the physical vapor deposition method possesses a high modulation depth of 12.9% and a low saturation intensity of 1.69 MW/cm² at 1.56 µm, facilitating the generation of harmonic mode-locking. The fundamental mode-locked operation was obtained at 1564.7 nm, with a pulse duration of 586 fs and a repetition rate of 34.235 MHz. At the pump power of 610 mW, 44th-order harmonic mode-locking with a repetition rate of 1.506 GHz was achieved, which is the highest yet reported in mode-locked fiber lasers using gold nanomaterials as SAs. Moreover, the gold nanofilm-based harmonic mode-locked fiber laser shows relatively high signal-to-noise ratios, high output power, and good stability. These results highlight the advantage of the gold nanofilm-based SA in realizing high repetition rate laser sources.

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带有金纳米薄膜可饱和吸收器的被动谐波模式锁定掺铒光纤激光器

我们展示了一种将纳米金薄膜作为可饱和吸收体（SA）的 1.5 GHz 谐波锁模掺铒光纤激光器。采用物理气相沉积法制造的高质量纳米金膜 SA 具有 12.9% 的高调制深度和 1.56 µm 处 1.69 MW/cm2 的低饱和强度，有利于产生谐波锁模。在 1564.7 nm 波长处实现了基本锁模操作，脉冲持续时间为 586 fs，重复频率为 34.235 MHz。在 610 mW 的泵浦功率下，实现了重复率为 1.506 GHz 的 44 阶谐波锁模，这是迄今为止使用金纳米材料作为 SA 的锁模光纤激光器中的最高值。此外，基于金纳米薄膜的谐波锁模光纤激光器显示出相对较高的信噪比、较高的输出功率和良好的稳定性。这些结果凸显了基于金纳米薄膜的 SA 在实现高重复率激光源方面的优势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

5.50

自引率

3.60%

发文量

377

审稿时长

1.5 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to: Artificially engineered optical structures Biomaterials Optical detector materials Optical storage media Materials for integrated optics Nonlinear optical materials Laser materials Metamaterials Nanomaterials Organics and polymers Soft materials IR materials Materials for fiber optics Hybrid technologies Materials for quantum photonics Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.