Microfiber-based few-layer black phosphorus saturable absorber for ultra-fast fiber laser
Microfiber-based few-layer black phosphorus saturable absorber for ultra-fast fiber laser
复制标题
用于超快光纤激光器的微纤维少层黑磷可饱和吸收体
DOI：
10.1364/oe.23.020030
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发表时间：
2015-07-27
期刊：
影响因子：
3.8
通讯作者：
Zhang, Han
中科院分区：
文献类型：
--
作者：
Luo, Zhi-Chao;Liu, Meng;Zhang, Han
少层黑磷(BP)由于其与石墨烯相似的结构和厚度相关的直接带隙，成为最具吸引力的石墨烯类似物，目前已引发了基于光子学和光电子学的二维材料研究的新浪潮。然而，几层BPS的实际应用的一个主要障碍来自于它们对激光诱导的光损伤的不稳定性。在这里，我们证明了通过液体剥离方法制备的少层BPS可以被开发为一种新型的实用的可饱和吸收材料(SA)，它可以用微纤维沉积少层BPS。通过在电信波段的开孔z扫描测量，验证了少层BPS的可饱和吸收特性。基于微光纤的BP器件已被发现显示出类似于4.5 mW的可饱和平均功率和10.9%的调制深度，通过平衡的孪生探测测量进一步证实了这一点。将该光学SA器件集成到掺铒光纤激光器中，获得了中心波长在1532~1570 nm范围内可调的锁模脉冲，脉冲宽度可达940ps。这种基于微光纤的几层BP SA器件通过“横向相互作用方案”防止BP氧化，可能部分缓解BP的光学损伤问题。我们的结果不仅证明了黑磷可能是另一种很有前途的超快光子学SA材料，而且还为与微光纤等光波导结构组装解决黑磷的光学损伤问题提供了一种实用的解决方案。(C)2015年美国光学学会
Few-layer black phosphorus (BP), as the most alluring graphene analogue owing to its similar structure as graphene and thickness dependent direct band-gap, has now triggered a new wave of research on two-dimensional (2D) materials based photonics and optoelectronics. However, a major obstacle of practical applications for few-layer BPs comes from their instabilities of laser-induced optical damage. Herein, we demonstrate that, few-layer BPs, which was fabricated through the liquid exfoliation approach, can be developed as a new and practical saturable absorber (SA) by depositing few-layer BPs with microfiber. The saturable absorption property of few-layer BPs had been verified through an open-aperture z-scan measurement at the telecommunication band. The microfiber-based BP device had been found to show a saturable average power of similar to 4.5 mW and a modulation depth of 10.9%, which is further confirmed through a balanced twin detection measurement. By integrating this optical SA device into an erbium-doped fiber laser, it was found that it can deliver the mode-locked pulse with duration down to 940 fs with central wavelength tunable from 1532 nm to 1570 nm. The prevention of BP from oxidation through the "lateral interaction scheme" owing to this microfiber-based few-layer BP SA device might partially mitigate the optical damage problem of BP. Our results not only demonstrate that black phosphorus might be another promising SA material for ultrafast photonics, but also provide a practical solution to solve the optical damage problem of black phosphorus by assembling with waveguide structures such as microfiber. (C) 2015 Optical Society of America