基于连续波注入的被动谐波锁模光纤激光器特性研究

项目名称： 基于连续波注入的被动谐波锁模光纤激光器特性研究

项目编号： No.11504081

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 孟义昌

作者单位： 河北科技大学

项目金额： 23万元

中文摘要： 被动谐波锁模是光纤激光器获得高重复频率超短光脉冲的有效方法。其不受激光器腔长限制也无需主动调制设备和滤波元件。然而被动谐波锁模的形成机制尚不明确，运行亦不够稳定，这极大限制了其实际应用。最近的研究表明，连续波可引起孤子间的相互作用，诱发被动谐波锁模的形成。本项目拟以石墨烯锁模掺铒光纤激光器为载体，通过外部连续波注入，研究连续波对多孤子运行的影响，探索利用连续波注入获得稳定高重复频率光脉冲的方法。主要内容有：1. 实验研究利用单个连续波注入获得被动谐波锁模所需条件；2. 理论和实验研究多个连续波注入对多孤子运行的影响，以及利用多个连续波注入获得被动谐波锁模所需条件；3. 通过增强激光腔的非线性和增大注入连续波频率间隔的方法，实现超高阶被动谐波锁模。本项目的开展将进一步揭示孤子与连续波相互作用机理，促进高重复频率超短光脉冲源的发展。

中文关键词： 光纤激光器；连续波注入；孤子互作用；被动谐波锁模

英文摘要： Passively harmonic mode locking (PHML) is an efficient method to get high repetition frequency ultrashort pulse in fiber laser. This technique not only gets rid of restriction of the cavity length, but also omits the active modulation device and filter elements. However, the formation mechanism of PHML is still unclear and the operation of PHML is unstable which greatly limit the practical application. Recent studies have shown that continuous wave can cause soliton interactions and induce the formation of PHML. In this project, the effect of continuous wave on multi-soliton operation would be studied using the continuous wave injection method with graphene mode-locked erbium-doped fiber laser as the carrier, and the method to obtain high repetition frequency optical pulse would also be explored. The following issues will be addressed: 1. Through experimental research of single continuous wave injection, to find the forming conditions of the PHML; 2. Through theoretical and experimental research, to study the effects of multiple continuous wave injection on the multiple soliton operation, and to find the forming conditions of the PHML with multiple continuous wave injection; 3. By increasing the nonlinear coefficient of the cavity and increasing the frequency spacing of the injected continuous waves, to achieve ultrahigh-order PHML. The project will further reveal the mechanisms of interaction between soliton and continuous wave, and promote the development of high repetition frequency ultrashort pulse source.

英文关键词： fiber laser;continuous wave injection;soliton interaction;passively harmonic mode locking