Copper nanoparticle polyvinyl alcohol-film with multimode fiber saturable absorber for Q-switched lasers

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-09-19 DOI:10.1016/j.yofte.2025.104389

Rizal Ramli , Norita Mohd Yusoff , Abubakar Sani , Mohammed Thamer Alresheedi , Eng Khoon Ng , Mohd Saiful Dzulkefly Zan , Mohd Adzir Mahdi

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引用次数: 0

Abstract

We have demonstrated the utilization of copper nanoparticle polyvinyl alcohol film saturable absorber with typical single-mode fiber (CuNP/PVA-SMF-SA) and multimode fiber (CuNP/PVA-MMF-SA) in an erbium-doped fiber laser for the generation of Q-switched pulses. For both methods, the CuNP/PVA film was coated with an index-matching gel sandwiched between two fiber ferrules. By incorporating CuNP/PVA-based SA in a laser cavity, stable Q-switched pulses were attained with a pump power range of 31–92 mW vs. 49–215 mW, a repetition rate (maximum pump power) of 16.61 kHz vs. 33.90 kHz, and a pulse width (maximum pump power) of 24.40 µs vs. 12.95 µs for CuNP/PVA-SMF-SA and CuNP/PVA-MMF-SA, respectively. The primary advantage of the CuNP/PVA-MMF-SA is its broader Q-switched pulse operation range relative to its counterpart, attributed to its weaker light confinement effect resulting from a bigger core diameter. This device could sustain a higher injected penetration power at 31.6 mW, yielding an energy pulse of 94 nJ, which represents a 1.57 enhancement factor. This approach facilitates pulse energy upscaling by maximizing the oversaturation power limit without compromising the device’s integrity. This will create new opportunities for high-energy Q-switched fiber laser applications in the photonics industry.

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铜纳米粒子聚乙烯醇膜与多模光纤可饱和吸收器用于调q激光器

我们已经证明了在掺铒光纤激光器中利用铜纳米粒子聚乙烯醇膜饱和吸收器和典型的单模光纤（CuNP/PVA-SMF-SA）和多模光纤（CuNP/PVA-MMF-SA）来产生调q脉冲。对于这两种方法，在CuNP/PVA薄膜上涂上夹在两个纤维箍之间的指数匹配凝胶。通过将CuNP/PVA-SMF-SA和CuNP/PVA-MMF-SA结合到激光腔中，获得了稳定的调q脉冲，泵浦功率范围分别为31-92 mW和49-215 mW，重复频率（最大泵浦功率）分别为16.61 kHz和33.90 kHz，脉宽（最大泵浦功率）分别为24.40µs和12.95µs。CuNP/PVA-MMF-SA的主要优势在于其调q脉冲工作范围相对于同类器件更宽，这要归功于芯直径更大导致的光约束效应更弱。该装置可以维持更高的注入穿透功率（31.6 mW），产生94 nJ的能量脉冲，增强系数为1.57。这种方法通过最大化过饱和功率限制而不影响器件的完整性，从而促进脉冲能量的升级。这将为高能调q光纤激光器在光电子工业中的应用创造新的机会。

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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.