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首页> 外文期刊>Scientific reports. >Ultrafast soliton and stretched-pulse switchable mode-locked fiber laser with hybrid structure of multimode fiber based saturable absorber
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Ultrafast soliton and stretched-pulse switchable mode-locked fiber laser with hybrid structure of multimode fiber based saturable absorber

机译：具有多模光纤饱和吸收体混合结构的超快孤子和拉伸脉冲可切换锁模光纤激光器

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We demonstrate an all-fiber mode locked laser based on hybrid structure of multimode fiber saturable absorber (SA) that can realize both conventional soliton and stretched-pulse states. Stable 16.44?MHz conventional soliton pulses are achieved by injecting 80?mW threshold pump power. By increasing the incident pump power to 420?mW, the laser evolves from soliton operation into stretched-pulse mode locking state. 310?fs stretched-pulse are obtained with the same repetition rate as the soliton pulses. The center wavelength and its 3?dB spectrum bandwidth are 1603 nm and 14.2?nm, respectively. For the first time, we experimentally confirm transition between conventional soliton and stretched-pulse in 1.5 μm mode-locked fiber laser by introducing multimode optical fiber SA. Moreover, the maximum single pulse energy of nearly 1 nJ is achieved. Such all-fiber mode-locked lasers based on hybrid structure of multimode fiber are attractive for practical applications without damage and the limitation of life time.
机译：我们演示了基于多模光纤可饱和吸收器（SA）的混合结构的全光纤锁模激光器，该激光器可以实现传统的孤子状态和拉伸脉冲状态。通过注入80？mW的阈值泵浦功率，可以获得稳定的16.44？MHz传统孤子脉冲。通过将入射泵浦功率提高到420？mW，激光器从孤子运行演变为拉伸脉冲模式锁定状态。获得310？fs的扩展脉冲，其重复率与孤子脉冲相同。中心波长和其3？dB光谱带宽分别为1603 nm和14.2？nm。通过引入多模光纤SA，我们首次通过实验确定了传统的孤子和1.5μm锁模光纤激光器中的拉伸脉冲之间的过渡。此外，实现了接近1 nJ的最大单脉冲能量。这样的基于多模光纤的混合结构的全光纤锁模激光器对于实际应用是有吸引力的，而没有损坏和寿命的限制。

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