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    • Ultrafast Laser Beam Shaping - Filaments and Light Sheets for Engineering Periodic Diffractive Structure in Bulk and Fibre Glasses

    Peter R. Herman, Pok Man Chow,Gligor Djogo,Stephen Ho,Jianzhao Li, Yueqi Wang,Polina Zavyalova

    2024 Photonics North (PN)（2024）

    Dept. Electrical and Computer Engineering

    Cited 0|Views4
    Abstract
    Ultrafast laser pulses have been molded with a spatial light modulator in three dimensions to control the shape and contrast of refractive index elements and facilitate their assembly into micro-optic diffractive elements in bulk glasses and optical fibre. Both one-dimensional and two-dimensional grating arrays are presented. Laser interactions were varied from gentle modification of refractive index contrast (i.e., $\Delta \mathrm{n}\sim 0.01$ ) to nano-explosions forming open nano-capillaries and nano-planes, enabling the engineering of highly functional and compact microsystems.
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    Key words
    Optical Pulse,Bulk Structure,Light Sheet,Thin Films,Refractive Index,Optical Fiber,Natural Sciences,Filament Formation,Rectangular Waveguide,Apodization,Radiation Mode,Spatial Light Modulator,Bragg Grating,Fiber Bragg Grating,Index Contrast,Refractive Index Contrast,Laser Interaction,Ultrafast Laser Pulses,Transparent Thin Film
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    【要点】：论文通过三维空间光调制器对超快激光束进行整形，实现了在玻璃块体和光纤中构建周期性衍射结构，创新点在于利用激光微爆炸技术形成了高度功能性且紧凑的微系统。
    

    【方法】：作者使用超快激光脉冲和空间光调制器在三维空间中控制折射率元素的形状和对比度，进而将这些元素组装成微光学子衍射元件。
    

    【实验】：实验通过改变激光与玻璃的相互作用，从轻微修改折射率对比度（即 $\Delta \mathrm{n}\sim 0.01$）到形成开放纳米毛细管和纳米平面的纳米爆炸，展示了在一维和二维光栅阵列中的结果，但未明确提及使用的数据集名称。