On the integration of SiC saturable absorber in passive Q-switched erbium-doped fiber laser: Insights from DFT calculations to laser performance

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-05-06 DOI:10.1016/j.yofte.2025.104246

T.A. Alrebdi , Saddam , Mamoon Asghar , Tian Si-Cong , Aamir Khan , Haroon Asghar

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Abstract

In this study, we explored the use of a saturable absorber (SA) composed of silicon-carbide (SiC) within a passively Q-switched (PQS) erbium-doped fiber laser (EDFL) based on ring cavity configurations. To investigate the structural and optical properties of SiC, we employed X-ray diffraction (XRD) and UV–visible spectroscopy. Additionally, the SiC-SA exhibited a modulation depth of 9.04%, a saturation intensity of 16.83 MW/cm², and non-saturable losses of 27.46%. Incorporating the SiC into the EDFL ring cavity yielded a stable, self-started PQS pulse operation observed at a lower threshold of 22.2 mW. The measured result showed that the laser achieved an emission wavelength of 1562 nm and 1563.1 nm at minimum (22.2 mW) and highest pump power (306.9 mW). Besides, at a maximum pump of 306.9 mW, repetition rate (RR), pulse width (PW), and output power of 96.62 kHz, 5.2 µs, and 3.1 mW were achieved, respectively. We also investigated the stability in terms of the output power of the Q-switched (QS) pulse operation at a pump power of 45.7 mW over nearly five hours, demonstrating stable output, indicating optimum stability of EDFL using SiC-SA. Furthermore, density functional theory (DFT) were performed to investigate the optical properties and band structure of carbon-rich SiC. These results highlight the viability of SiC in pulsed laser technology and opening up new possibilities for its application in pulse laser technology and ultrafast photonics.

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无源调q掺铒光纤激光器中SiC可饱和吸收体的集成：从DFT计算对激光器性能的启示

在这项研究中，我们探索了在基于环形腔结构的被动调q （PQS）掺铒光纤激光器（EDFL）中使用由碳化硅（SiC）组成的可饱和吸收体（SA）。为了研究碳化硅的结构和光学性质，我们采用了x射线衍射（XRD）和紫外可见光谱法。此外，SiC-SA的调制深度为9.04%，饱和强度为16.83 MW/cm2，不饱和损耗为27.46%。将SiC加入EDFL环形腔中，在22.2 mW的较低阈值下观察到稳定的自启动PQS脉冲操作。测量结果表明，在最小泵浦功率（22.2 mW）和最大泵浦功率（306.9 mW）下，激光器的发射波长分别为1562 nm和1563.1 nm。在最大泵浦功率为306.9 mW时，重复频率（RR）为96.62 kHz，脉冲宽度（PW）为5.2µs，输出功率为3.1 mW。我们还研究了调q （QS）脉冲在45.7 mW的泵浦功率下运行近5小时的稳定性，显示出稳定的输出，表明使用SiC-SA的EDFL具有最佳稳定性。此外，利用密度泛函理论（DFT）研究了富碳SiC的光学性质和能带结构。这些结果突出了碳化硅在脉冲激光技术中的可行性，为其在脉冲激光技术和超快光子学中的应用开辟了新的可能性。

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 Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.