Composite film with anisotropically enhanced optical nonlinearity for a pulse-width tunable fiber laser†,Journal of Materials Chemistry C

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Composite film with anisotropically enhanced optical nonlinearity for a pulse-width tunable fiber laser†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-12-21 00:00:00 , DOI: 10.1039/c7tc03711b
Zhijun Ma _{1,

2,

3,

4,

5} , Hang Zhang _{6,

7,

8,

9,

10} , Zhongliang Hu _{1,

2,

3,

4,

5} , Jiulin Gan _{1,

2,

3,

4,

5} , Changsheng Yang _{1,

2,

3,

4,

5} , Zhichao Luo _{5,

11,

12,

13,

14} , Tian Qiao _{1,

2,

3,

4,

5} , Mingying Peng _{1,

2,

3,

4,

5} , Guoping Dong _{1,

2,

3,

4,

5} , Zhongmin Yang _{1,

2,

3,

4,

5} , Frank W. Wise _{15,

16,

17,

18} , Jianrong Qiu _{1,

2,

3,

4,

5}

Affiliation

State Key Laboratory of Luminescent Materials and Devices
Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques
School of Materials Science and Engineering
South China University of Technology
Guangzhou
National Key Laboratory of Shockwave and Detonation Physics
Institute of Fluid Physics
Chinese Academy of Engineering Physics
Mianyang
P. R. China
Laboratory of Nanophotonic Functional Materials and Devices
School of Information and Optoelectronic Science and Engineering
South China Normal University
China
School of Applied and Engineering Physics
Cornell University
Ithaca
USA

One-dimensional nanomaterials usually possess unique anisotropic chemical or physical properties. For practical device applications, one of the biggest challenges is their large-scale assembly with predesigned architecture to render optimized collective properties. Based on our previous studies, here we report an extended investigation on the macroscopically aligned assembly of gold nanorods with tunable aspect ratio (AR) in transparent polymer films based on the electrospinning technique. The optical properties of the composite films were investigated using polarized extinction spectra and the Z-scan technique. Due to the collective longitudinal LSPR of the macroscopically aligned gold nanorods, the transparent composite films exhibited anisotropically enhanced optical nonlinearity. The intensity of the nonlinear optical signal of the films can be tuned by varying the polarization direction of the laser on the films. Moreover, the influence from the AR and the doping concentration of GNRs on the optical properties of the composite films was also investigated. To demonstrate an example of practical applications, the composite film was employed as a saturable absorber to construct a pulsed fiber laser. Inspiringly, the pulsed fiber laser with switchable mode-locking and Q-switching operation modes was realized successfully. The switching of the operation mode of the laser can be triggered simply through variation of the laser's polarization direction. Such a pulse-width tunable fiber laser is potentially useful in various application scenarios.

中文翻译：

具有各向异性增强的光学非线性的复合膜，用于脉宽可调光纤激光器†

一维纳米材料通常具有独特的各向异性化学或物理性质。对于实际的设备应用，最大的挑战之一是采用预先设计的架构进行大规模装配以呈现最佳的集体特性。基于我们以前的研究，在这里我们报告了基于静电纺丝技术的透明聚合物薄膜中具有可调长宽比（AR）的金纳米棒的宏观排列组装的扩展研究。使用偏振消光光谱和Z扫描技术研究了复合膜的光学性能。由于宏观上对准的金纳米棒的集体纵向LSPR，透明复合膜表现出各向异性增强的光学非线性。薄膜的非线性光信号的强度可以通过改变薄膜上激光的偏振方向来调节。此外，还研究了AR和GNR的掺杂浓度对复合膜光学性能的影响。为了说明实际应用的例子，复合膜被用作可饱和吸收体以构造脉冲光纤激光器。令人鼓舞的是，成功实现了具有可切换锁模和Q切换操作模式的脉冲光纤激光器。可以简单地通过改变激光器的偏振方向来触发激光器的工作模式的切换。这种脉宽可调光纤激光器在各种应用场景中可能有用。还研究了AR和GNR的掺杂浓度对复合膜光学性能的影响。为了说明实际应用的例子，复合膜被用作可饱和吸收体以构造脉冲光纤激光器。令人鼓舞的是，成功实现了具有可切换锁模和Q切换操作模式的脉冲光纤激光器。可以简单地通过改变激光器的偏振方向来触发激光器的工作模式的切换。这种脉宽可调光纤激光器在各种应用场景中可能很有用。还研究了AR和GNR的掺杂浓度对复合膜光学性能的影响。为了说明实际应用的例子，复合膜被用作可饱和吸收体以构造脉冲光纤激光器。令人鼓舞的是，成功实现了具有可切换锁模和Q切换操作模式的脉冲光纤激光器。可以简单地通过改变激光器的偏振方向来触发激光器的工作模式的切换。这种脉宽可调光纤激光器在各种应用场景中可能有用。将该复合膜用作可饱和吸收体来构成脉冲光纤激光器。令人鼓舞的是，成功实现了具有可切换锁模和Q切换操作模式的脉冲光纤激光器。可以简单地通过改变激光器的偏振方向来触发激光器的工作模式的切换。这种脉宽可调光纤激光器在各种应用场景中可能有用。将该复合膜用作可饱和吸收体来构成脉冲光纤激光器。令人鼓舞的是，成功实现了具有可切换锁模和Q切换操作模式的脉冲光纤激光器。可以简单地通过改变激光器的偏振方向来触发激光器的工作模式的切换。这种脉宽可调光纤激光器在各种应用场景中可能有用。

更新日期：2017-12-21

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