Chalcogenide microporous fibers for linear and nonlinear applications in the mid-infrared.
Chalcogenide microporous fibers for linear and nonlinear applications in the mid-infrared.
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DOI：
10.1364/oe.18.008647
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发表时间：
2010-04
期刊：
影响因子：
3.8
通讯作者：
B. Ung;M. Skorobogatiy
中科院分区：
文献类型：
--
作者：
B. Ung;M. Skorobogatiy
介绍了一种新型的中红外光微结构光纤。硫族化物玻璃基微孔光纤允许广泛的色散工程，使得能够设计平坦的波导色散窗口和多个零色散点-从体材料零色散点蓝移或红移-包括大约10.6微米的CO（2）激光线的光谱区域。对一种特定的硫族化物微孔光纤进行了超连续谱模拟，证明了所提出的微结构光纤设计的潜力，使用脉冲CO（2）激光作为泵浦，在中红外区域产生宽连续谱。此外，还对硫属化物As（2）Se（3）的拉曼响应函数进行了解析描述，并计算出在1.54 μ m泵浦下的拉曼时间常数为5.4 fs。微孔光纤与微丝、纳米线和其他小型实芯设计的区别在于广泛的色散工程的前景以及由孔隙率产生的低损耗导向，从而在非线性介质中提供长的相互作用长度。
A new type of microstructured fiber for mid-infrared light is introduced. The chalcogenide glass-based microporous fiber allows extensive dispersion engineering that enables design of flattened waveguide dispersion windows and multiple zero-dispersion points - either blue-shifted or red-shifted from the bulk material zero-dispersion point - including the spectral region of CO(2) laser lines approximately 10.6 microm. Supercontinuum simulations for a specific chalcogenide microporous fiber are performed that demonstrate the potential of the proposed microstructured fiber design to generate a broad continuum in the middle-infrared region using pulsed CO(2) laser as a pump. In addition, an analytical description of the Raman response function of chalcogenide As(2)Se(3) is provided, and a Raman time constant of 5.4 fs at the 1.54 microm pump is computed. What distinguishes the microporous fiber from the microwire, nanowire and other small solid-core designs is the prospect of extensive chromatic dispersion engineering combined with the low loss guidance created by the porosity, thus offering long interaction lengths in nonlinear media.