基于非线性吸收环镜的掺铥模式锁定光纤激光器中的噪声脉冲动力学特性

IF 3.1 3区物理与天体物理 Q2 Engineering Optik Pub Date : 2025-02-01 Epub Date: 2024-12-17 DOI:10.1016/j.ijleo.2024.172158

Shubhranil Maity , Uttam Kumar Samanta , Sourav Das Chowdhury , Debasis Pal , Atasi Pal

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引用次数: 0

摘要

非线性环形反射镜作为人造饱和吸收体被广泛应用于无源锁模光纤激光器的设计中。理论估计表明，“图8”结构的非线性吸收环镜（NAbLM）比其他传统环镜具有更高的调制深度和更大的消光比。对非线性放大环镜和非线性放大环镜的透射率进行了计算和比较。因此，利用基于nablm的激光腔设计了2 µm左右的锁模铥光纤激光器。在稳定状态下，获得了3 ns的矩形宽带类噪声脉冲，脉冲能量为141 nJ，重复频率为1.77 MHz。

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Dynamics of Noise-like pulses in a Thulium-doped mode-locked fiber laser based on a non-linear absorbing loop mirror

Nonlinear loop mirrors are widely used as an artificial saturable absorber to design passive mode-locked fiber lasers. Theoretical estimation shows that the nonlinear absorbing loop mirror (NAbLM) in ‘figure-8’ architecture can provide higher modulation depth and generate a larger extinction ratio over other conventional loop mirrors. The transmissivity of both the NAbLM and non-linear amplifying loop mirror (NALM) has been calculated and compared. Accordingly, a mode-locked Thulium fiber laser at around 2 µm has been designed using an NAbLM-based laser cavity. In the stable state, square-shaped broadband noise-like pulses of 3 ns at a repetition rate of 1.77 MHz have been obtained with a pulse energy of 141 nJ.

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.