使用盘绕和锥形少模光纤偏振控制器作为饱和吸收器生成稳定的超短脉冲

Pub Date : 2024-03-15 DOI:10.1007/s10946-024-10189-3

F. Y. Zhao, X. H. Hu, F. M. Zou, T. Zhang, Y. S. Wang, J. Q. Lan

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引用次数: 0

摘要

我们提出了一种盘绕和锥形分级指数少模光纤（FMF）偏振控制器（PC），作为全光纤激光器中的可饱和吸收体（SA）。我们在腔内使用 40 厘米长的锥形分级指数 FMF，获得了信噪比（SNR）为 65 dB 的 845 fs 超短脉冲。光谱以 1588.2 nm 为中心，3 dB 光谱带宽为 4.04 nm。此外，在腔内泵浦功率为 140 至 360 mW 之间，还观察到 Q 开关模式锁定状态。这些结果进一步证明了盘绕锥形分级索引 FMF PC 作为稳定高能超短脉冲形成 SA 的应用，并提供了一种产生超短脉冲的技术方法。

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Stable Ultrashort Pulse Generation Using a Coiled and Tapered Few-Mode-Fiber Polarization Controller as a Saturable Absorber

We present a coiled and tapered graded-index few-mode-fiber (FMF) polarization controller (PC) as a saturable absorber (SA) in an all-fiber laser. We obtain the 845 fs ultrashort pulse with a signal-to-noise ratio (SNR) of 65 dB, using a tapered graded-index FMF of 40 cm in the cavity. The spectrum is centered at 1588.2 nm with a 3 dB spectral bandwidth of 4.04 nm. Furthermore, a Q-switched mode-locked state is observed between 140 and 360 mW of the pump power in the cavity. The results further demonstrate the application of a coiled and tapered graded-index FMF PC as a SA for stable high-energy ultrashort pulse formation and provide a technical method for generating ultrashort pulses.

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