通过光声共振增强基频为亚兆赫的掺铒/掺镱光纤激光器中的高阶谐波锁定模式

IF 2.6 3区 计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Alexander Sudin , Igor Volkov , Sergey Ushakov , Konstantin Nishchev , Dmitry Korobko , Andrei Fotiadi
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引用次数: 0

摘要

我们对基频为 0.678 MHz 的长掺铒/掺镱光纤环形激光器进行了实验研究。仅通过调节偏振控制器中的四分之一波板,我们就发现了一系列可重复的激光产生机制。其中,多个孤子束与低阶腔谐波(从 3 次谐波到 8 次谐波)谐波锁模。值得注意的是,我们还发现了一种以稳定的孤子束为特征的机制,它与 320 MHz 的 472 次空腔谐波进行谐波模式锁定。这一机制表现出非凡的谐波锁模稳定性,超模抑制水平为 49 dB,对应的定时抖动量级为几皮秒。我们将这种非凡的稳定性归功于激光重复频率与光纤特征声学模式频率(特别是 R06 和 TR2,15)之间的精确光声学共振。这些发现代表了高性能光纤激光器运行领域的重大进步,尤其是在提高基频为亚兆赫的激光器的稳定性,使其能够以更高的重复率产生规则脉冲方面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancing high-order harmonic mode-locking in Er/Yb-Doped fiber lasers with sub-MHz fundamental frequency via optoacoustic resonance
We present an experimental study of a long Er/Yb-doped fiber ring laser with a low fundamental frequency of 0.678 MHz. By solely adjusting the quarter-wave plate in the polarization controller, we uncovered a series of reproducible laser generation regimes. Among these, multiple soliton bunches were harmonically mode-locked to low-order cavity harmonics (from the 3rd to the 8th). Notably, we also identified a regime featuring a stable soliton train harmonically mode-locked to the 472nd cavity harmonic at 320 MHz. This regime demonstrated exceptional harmonic mode-locking stability, with a supermode suppression level of 49 dB corresponding to the timing jitter on the order of a few picoseconds. We attribute this remarkable stability to an exact optoacoustic resonance between the laser repetition rate and the fiber eigen acoustic mode frequencies, specifically identified as R06 and TR2,15. These findings represent a significant advancement in high-performance fiber laser operation, particularly in enhancing the stability of lasers with sub-MHz fundamental frequencies capable to generate regular pulses with much higher repetition rates.
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来源期刊
Optical Fiber Technology
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.
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