远红外Te基硫系玻璃光子晶体光纤制备及其非线性光学性质研究

Te基硫系玻璃光子晶体光纤（简称Te-PCF）是利用玻璃材料中声子能量最低、红外透过区域最宽且非线性折射率最高（石英的1万倍）的Te(碲)基硫系玻璃制备的一种新型远红外光子晶体光纤。它在中、远红外领域的光纤激光和放大器、能量传输、生物传感及非线性光器件等领域具有广泛应用前景，尤其是利用高非线性产生的超连续谱(SC)可展宽到远红外区域，解决远红外无高质量激光光源的科学难题，因此近年来Te-PCF已成为国际上讨论的PCF热点之一，而国内在此领域尚处于空白。本项目拟开展小模场面积Aeff、高非线性的Te-PCF设计、制备及性能研究，在理论上建立高非线性硫系PCF结构设计及非线性模型，制备出小Aeff、高非线性、色散可控、低损耗、结构完整、高效超连续谱产生的Te-PCF，旨在获得拥有自主知识产权的远红外光子晶体光纤的制备技术，为今后推动远红外光子晶体光纤器件应用和发展提供理论依据和科学的实验数据。

Photonic crystal fiber based on Te-chalcogenide glass (abbreviated to Te-PCF) is a novel far-infrared photonic crystal fiber, which possess the lowest phonon energy, widest IR transmission spectra and highest nonlinear refractive index among glass hosts. The PCF can be adopted to develop fiber laser or amplifier, energy transferring, biology sensor and nonlinear optic devices in mid and far-IR fields, especially, a far-IR supercontinuum (SC) generation can be observed in the high nonlinearity Te-PCF, and it will meet the need of high quality laser in far-IR, so, more and more researchers are focused on the Te-PCF, but it is perfectly fresh in China. In this project, more attention will be paid on the design of structure with little model field area of Aeff, and high nonlinearity for the Te-PCF, then, continually on the fiber fabrication and performances investigation. Here, a theoretic model will be built to the relations of fiber structure and optic nonlinearity, at last, a far-IR Te-PCF will be fabricated with low Aeff, high nonlinearity, controllable dispersion, low loss, perfect in shape and effective SC generation. This work will be succeeded in developing our own intellectual property on far-IR PCF fabrication in China, and then give helps in the development of far-IR PCF devices with basic theory and experiment data