基于碲酸盐和硫化物高非线性微结构光纤的布里渊激光器理论和实验研究

项目名称： 基于碲酸盐和硫化物高非线性微结构光纤的布里渊激光器理论和实验研究

项目编号： No.61307056

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 高伟清

作者单位： 合肥工业大学

项目金额： 26万元

中文摘要： 近年来，基于非石英玻璃的光纤逐渐成为研究热点。其中，碲酸盐和硫化物光纤既具有高非线性，又具有宽光谱透射范围。碲酸盐和硫化物光纤的布里渊增益系数是普通石英光纤的几倍到几十倍。通过控制微结构光纤的结构，可以改变光纤中的声波场传输特性，进而控制受激布里渊散射的阈值和增益。本项目拟对基于碲酸盐和硫化物高非线性微结构光纤的布里渊激光器进行理论和实验研究。相比较基于石英光纤的布里渊激光器，基于碲酸盐和硫化物微结构光纤的布里渊激光器能降低阈值，提高增益及输出效率，同时缩短光纤长度以降低激光系统的复杂性。预计通过本项目的研究，可进一步拓展受激布里渊散射的应用空间：将基于受激布里渊散射的分布式光纤传感扩展到中红外波段；在基于布里渊激光的微波信号和高频超短脉冲的产生中，可获得更宽的微波频率和脉冲频率调谐范围；在基于布里渊散射的光速控制中，可获得更大幅度的光速提前或光速减慢。

中文关键词： 布里渊光纤激光器；碲酸盐光纤；硫化物光纤；微结构光纤；光纤非线性效应

英文摘要： Recently, non-silica fibers have been the object of extensive researches. Among these fibers, tellurite and chalcogenide fiber have both high nonlinearity and wide spectral transmission range. The Brillouin gain coefficients of tellurite and chalcogenide fiber are much higher than those of silica fibers. The transmission of acoustic wave in fibers can be controlled by the structure design of microstructured optical fibers (MOFs). Thus, the Brillouin threshold and gain can be controlled. The objective of this project is to study the Brillouin fiber laser (BFL) based on tellurite and chalcogenide high nonlinear MOF theoretically and experimentally. Compared to the BFL based on silica fibers, the BFL based on tellurite and chalcogenide fiber can decrease the threshold, improve the gain and output efficiency, and decrease the fiber length to simplify the laser system. By the research of this project, the applications of stimulated Brillouin scattering (SBS) will be expanded further: the distributed fiber sensors based on SBS can be extended to mid-infrared region; wider tunable range of frequency can be obtained in the generation of microwave signal and high-frequency ultra-short pulse by Brillouin lasing; further temporal advance or delay can be obtained in the control of optical velocity by SBS.

英文关键词： Brillouin fiber laser；tellurite fiber；chalcogenide fiber；microstructured optical fiber；optical fiber nonlinearity