High-energy all-fiber Er-doped femtosecond chirped-pulse amplification system seeded by nonlinear multimodal interference mode-locked fiber laser

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

Optical Fiber Technology Pub Date : 2025-04-20 DOI:10.1016/j.yofte.2025.104245

H. Ahmad , M.U.M. Ithnahaini , M.Z. Samion , M.K.A. Zaini , M.F. Ismail , L. Bayang , K. Thambiratnam , B. Ortaç

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Abstract

We report a high-energy femtosecond 1.5 µm all-fiber source based on chirped-pulse amplification (CPA) of soliton pulses generated by a multimodal interference. The erbium-doped mode-locked fiber seed source utilizes a nonlinear multimodal interference-based saturable absorber designed with a single-multi-single (SMS) mode fiber configuration, which can generate femtosecond soliton pulses. A commercially available ultra-high numerical aperture fiber with normal group velocity dispersion stretches the pulses up to a duration of 5.14 ps. These stretched pulses are amplified in pre- and main amplification stages to achieve watts-level average output power. Additionally, single-mode fiber (SMF) effectively compresses the pulses back down to femtosecond duration. The CPA configuration provides output power, pulse width, and repetition rate of 1.34 W, 580 fs, and 14.7 MHz, respectively, measured at a central wavelength of 1563 nm. The CPA performance yields a pulse energy of 91.2 nJ and a peak power of 157 kW. Notably, the system exhibits stable output with a minimal average output power fluctuation of 0.08 dB, indicating a stable laser performance.

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非线性多模干涉锁模光纤激光器种子高能全光纤掺铒飞秒啁啾脉冲放大系统

我们报告了一种基于多模态干涉产生的孤子脉冲的啁啾脉冲放大（CPA）的高能飞秒 1.5 µm 全光纤源。掺铒模式锁定光纤种子源利用基于非线性多模干涉的可饱和吸收器，采用单多单（SMS）模式光纤配置设计，可产生飞秒孤子脉冲。一种具有正常群速度色散的市售超高数值孔径光纤可将脉冲拉伸到 5.14 ps 的持续时间。这些拉伸脉冲在预放大和主放大级进行放大，以实现瓦级的平均输出功率。此外，单模光纤（SMF）可有效地将脉冲压缩回飞秒持续时间。CPA 配置的输出功率、脉冲宽度和重复率分别为 1.34 W、580 fs 和 14.7 MHz，以 1563 nm 的中心波长测量。CPA 性能可产生 91.2 nJ 的脉冲能量和 157 kW 的峰值功率。值得注意的是，该系统输出稳定，平均输出功率波动极小，仅为 0.08 dB，表明激光性能稳定。

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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.