| 高功率高重复频率飞秒掺镱光纤激光频率梳的研究(特邀) |
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| 引用本文： | 孙敬华,孙克雄,林志芳,孙继芬,晋路,徐永钊.高功率高重复频率飞秒掺镱光纤激光频率梳的研究(特邀)[J].红外与激光工程,2019,48(1):103001-0103001(9). |
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| 作者姓名： | 孙敬华 孙克雄 林志芳 孙继芬 晋路 徐永钊 |
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| 作者单位： | 1.东莞理工学院 电子工程与智能化学院,广东 东莞 523808; |
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| 基金项目： | 国家自然科学基金（11274133） |
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| 摘 要： | 飞秒光学频率梳在精密计量学和光谱学中扮演着革命性的推动角色，成为近二十年超短脉冲激光技术及应用研究领域最活跃的前沿方向之一。文中基于250 MHz重复频率（frep）的掺镱（Yb）光纤激光器，研究了不同腔内色散以及锁模机制对飞秒脉冲序列载波包络相位偏移频率（fCEO）噪声的影响。通过对飞秒光梳细节的优化，得到了49 dB信噪比的fCEO拍频信号并获得了秒稳3.210-10的锁定结果，同时frep的锁定结果也达到了到了秒稳3.410-13的精度。此外文中还研究了不同啁啾状态的种子光飞秒脉冲对基于大模场面积双包层Yb光子晶体光纤放大器输出光脉冲宽度的影响。以携带-3.8104 fs2预啁啾量的光脉冲作为种子光，在60 W 976 nm半导体激光泵浦下，获得了250 MHz重复频率、23 W平均功率和66 fs压缩后脉冲宽度的激光输出。
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| 关 键 词： | 光学频率梳 光子晶体光纤放大器 超连续产生 频率锁定 |
| 收稿时间： | 2018-08-15 |
High power high repetition rate femtosecond Ytterbium-doped fiber laser frequency comb (invited) |
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| Affiliation: | 1.School of Electronic Engineering and Intelligentization,Dongguan University of Technology,Dongguan 523808,China;2.School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;3.Institute of Photonics and Quantum Sciences,Heriot-Watt University,Edinburgh EH14 4AS,UK |
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| Abstract: | Femtosecond optical frequency combs have introduced revolutionary promotions to precision optical spectroscopy and metrology, and have been hot topics of laser technologies and applications for two decades. In this article, the affects of intracavity dispersion and mode-locking mechanism on carrier-envelope phase slip frequency (fCEO) of femtosecond laser pulse trains were researched based on a femtosecond Ytterbium-doped fiber laser with 250 MHz repetition rate. By optimizing the intracavity dispersion, pumping power, and detection methods, 49 dB signal-noise-ratio fCEO beat signal was obtained which then was stabilized it to a stability of 3.210-10 in 1 second, and a stability of 3.410-13 (1 s) of frep was also achieved. In addition, the effects of pulse chirping on the output pulse duration of a fiber amplifier was researched based on a piece of large-mode-area photonic crystal Yb doped fiber. Under 60 W of pumping power from a laser diode at 976 nm wavelength, 23 W average output power from the amplifier with 66 fs pulse duration and 250 MHz repetition rate was achieved when the seed pulses were carring -3.8104 fs2 pre-chirping dispersion. |
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