We report a supercontinuum generation (SCG) in a waveguide that spontaneously forms without an etching process during the deposition of a core material on a preformed ${\rm{Si}}{{\rm{O}}_2}$ substructure. The mechanism of dispersion control for this new, to the best of our knowledge, type of waveguide is analyzed by numerical simulation, which results in a design rule to achieve a target dispersion profile by adjusting the substructure geometry. SCG is experimentally demonstrated with a waveguide made of ${\rm{A}}{{\rm{s}}_2}{{\rm{S}}_3}$, chalcogenide glass, which has low material absorption over the mid-IR range. A dispersion-controlled waveguide with a length of 10 mm pumped with 77 pJ pulses at a telecommunication wavelength of 1560 nm resulted in a supercontinuum that extends by more than 1.5 octaves.

中文翻译：

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在不直接蚀刻的情况下在As ₂ S ₃波导中产生超连续谱

我们报道了在预成型$ {\ rm {Si}} {{\ rm {O}} _ 2} $子结构上沉积核心材料的过程中，在没有蚀刻过程的情况下自发形成的波导中的超连续谱（SCG）。据我们所知，这种新型波导的色散控制机制通过数值模拟进行了分析，得出了一种设计规则，即通过调整子结构的几何形状来实现目标色散分布。SCG用$ {\ rm {A}} {{\ rm {s}} _ 2} {{\ rm {S}} _ 3} $制成的波导进行了实验演示硫属化物玻璃，在中红外范围内材料吸收率低。波长为1560 nm的波长为10 mm的色散控制波导以77 pJ脉冲泵浦，产生的超连续谱扩展了超过1.5个八度。