Kang Zhe, Wang Fang
Changchun Observatory of National Astronomical Observators, Chinese Academy of Sciences, Changchun 130117, China.
College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
Nanomaterials (Basel). 2024 Dec 8;14(23):1971. doi: 10.3390/nano14231971.
Palladium (Pd) nanocubes, a type of metallic nanostructure, have demonstrated remarkable optoelectronic properties, garnering significant attention. However, their nonlinear optical characteristics and related device applications remain underexplored. In this study, we report the fabrication of a novel saturable absorber (SA) by depositing Pd nanocubes onto a D-shaped fiber (DF). The Pd nanocubes, with an average size of 12 nm, were synthesized and integrated with a DF, resulting in a highly robust SA with broadband saturable absorption characteristics. When incorporated into Er-doped laser cavities, the Pd-DF SA enabled the generation of ultrafast pulses with a central wavelength of 1560 nm, a corresponding repetition rate of 26.7 MHz, and a temporal width of 1.85 ps. Our findings highlight the strong potential of the Pd-DF device as a versatile SA for constructing high-energy ultrafast fiber lasers.
钯（Pd）纳米立方体作为一种金属纳米结构，已展现出卓越的光电特性，备受关注。然而，其非线性光学特性及相关器件应用仍有待深入探索。在本研究中，我们报道了通过将钯纳米立方体沉积在D形光纤（DF）上制备新型可饱和吸收体（SA）的方法。合成了平均尺寸为12纳米的钯纳米立方体，并将其与D形光纤集成，得到了具有宽带可饱和吸收特性的高度稳健的可饱和吸收体。当将钯 - D形光纤可饱和吸收体引入掺铒激光腔时，能够产生中心波长为1560纳米、相应重复频率为26.7兆赫兹且时间宽度为1.85皮秒的超快脉冲。我们的研究结果突出了钯 - D形光纤器件作为构建高能超快光纤激光器的通用可饱和吸收体的强大潜力。
