PtTe2-based high-order harmonic (368 MHz) ultrafast fiber laser

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Optical Fiber Technology Pub Date : 2025-05-01 Epub Date: 2025-02-11 DOI:10.1016/j.yofte.2025.104159

Yutian He , Yan Xu , Shixian Sun , Weijie Xu , Yu Wei , Fei Wang , Mingzhi Sun , Cheng Lu , Wenfei Zhang , Guomei Wang , Caixun Bai , Zhao Li , Huanian Zhang , Nannan Xu , Shenggui Fu

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Abstract

This paper investigates the application of PtTe₂ as a saturable absorber (SA) in Er-doped fiber lasers (EDFL). We obtained PtTe₂-SA based on tapered optical fiber while using liquid phase exfoliation (LPE). The modulation depth of PtTe₂-SA reached 7.1 %,demonstrating excellent nonlinear absorption characteristics. An ultrafast fiber laser based on PtTe₂-SA was designed and constructed. Both conventional soliton (CS) and higher-order harmonic mode-locking (HML) were realized. The CS was realized with the central wavelength of 1559.4 nm and the pulse width of 919 fs, at a pump power of 350 mW. Exhibiting a repetition frequency of 4.72 MHz and a signal-to-noise ratio of 60.3 dB. Increasing the pump power to 422 mW and 726 mW resulted in the generation of 2nd order and 78th order HML, respectively. The 78th order HML achieved the repetition frequency of up to 368 MHz and the pulse width of 1.93 ps. These results indicate that PtTe₂-SA exhibits excellent optical modulation properties in EFDL while holds promise for applications in high repetition frequency fiber lasers.

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基于ptte2的高次谐波（368 MHz）超快光纤激光器

研究了PtTe2作为可饱和吸收材料在掺铒光纤激光器中的应用。采用液相剥离（LPE）法制备了基于锥形光纤的PtTe2-SA。PtTe2-SA的调制深度达到7.1%，具有良好的非线性吸收特性。设计并制作了基于PtTe2-SA的超快光纤激光器。实现了常规孤子（CS）和高次谐波锁模（HML）。在350 mW的泵浦功率下，中心波长为1559.4 nm，脉宽为919 fs，实现了激光脉冲控制。其重复频率为4.72 MHz，信噪比为60.3 dB。将泵功率增加到422 mW和726 mW，分别产生了2级和78级HML。78阶HML实现了高达368 MHz的重复频率和1.93 ps的脉冲宽度。这些结果表明，PtTe2-SA在EFDL中具有良好的光调制特性，同时在高重复频率光纤激光器中具有应用前景。

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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.