基于微谐振器的高重频脉冲掺镱光纤激光器特性研究

项目名称： 基于微谐振器的高重频脉冲掺镱光纤激光器特性研究

项目编号： No.61307058

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： 罗智超

作者单位： 华南师范大学

项目金额： 28万元

中文摘要： 高重频脉冲由于在天文学、光频测量、高速光通信等众多领域有重要的应用价值，是激光技术领域争相研究的对象。耗散四波混频锁模是获得高重复率脉冲的有效方法。由于器件限制，目前尚未在1.0微米波段实现耗散四波混频锁模高重频脉冲输出。最近，1.0微米波段低反常色散值的微谐振器研制成功，为我们提供了一种崭新的思路。本项目拟将新提出的微谐振器和耗散四波混频锁模技术相结合，研究1.0微米波段的高重复频率脉冲掺镱光纤激光器及其可调谐特性。主要内容有：1.研究耗散四波混频锁模高重频掺镱光纤激光器的脉冲稳定性；2.研究腔内色散值及泵浦功率对高重频脉冲特性的影响；3.探索高重频率脉冲的可调谐特性。本项目旨在突破当前掺镱光纤激光器脉冲重复率几个GHz的水平，实现百GHz量级的高重频脉冲输出，并研究其可调谐特性。本项目的开展，不仅能加深对基于微谐振器光纤激光器系统物理特性的理解，而且对光纤激光技术的发展具有重要意义。

中文关键词： 超高重频脉冲；光纤激光器；可调谐；孤子非线性现象；锁模技术

英文摘要： High-repetition rate pulse has attracted much attention due to the wide application in fields such as astronomy, optical frequency measurement, optical communications and so on. Dissipative four-wave mixing (DFWM) mode-locked technique was regarded as an effective way to generate high-repetition rate pulse. However, due to the limitation of optical components, there is no demonstration of DFWM mode-locked high-repetition rate pulse at 1.0 um. Very recently, the microresonator with sufficiently low dispersion at 1.0 um was successfully designed and fabricated, which provides a new tool for the generation of DFWM mode-locked high-repetition rate pulse in Yb-doped fiber lasers. In this project, by combining the newly proposed microresonator and DFWM mode-locked technique, we will investigate the DFWM mode-locked high-repetition rate pulsed Yb-doped fiber laser and its tuning characteristics. The following issues will be addressed: 1. The pulse stability generated by the DFWM mode-locked Yb-doped fiber laser. 2. The influences of cavity dispersion and pump power level on the pulse characteristics. 3. The tunable operation of high-repetition rate pulse. The project will develop a pulsed Yb-doped fiber laser with a repetition rate of hundreds of GHz as well as tuning operation. Carrying out this project will not only

英文关键词： Ultrahigh repetition rate pulse；fiber lasers；tunable operation；soliton nonlinear phenomena；mode-locking techniques