基于微纳光纤石墨烯锁模器的多波长脉冲光纤激光器研究

多波长被动锁模光纤激光器在波分复用、码分复用、光纤传感、光学测量等领域有重要的应用价值，是当今光纤激光器领域中的研究热点之一。针对目前多波长脉冲光纤激光器普遍要外加调制器获得锁模脉冲输出的问题，本项目拟采用微纳光纤石墨烯锁模器来获得室温稳定的多波长被动锁模光纤激光器。主要研究：（1）微纳光纤的结构参数及石墨烯沉积程度对多波长被动锁模脉冲特性的影响；（2）获得ITU-T标准波长间隔的多波长被动锁模脉冲；（3）多波长脉冲的时域特性及其内在物理机制；（4）不同腔内净色散值对多波长脉冲特性的影响；（5）多波长锁模脉冲的可调谐特性。通过上述研究，揭示多波长被动锁模光纤激光器的内在物理机制，设计出结构简单、成本低廉、室温稳定的多波长被动锁模光纤激光器，为多波长脉冲光源的设计提供新的思路和技术方案。本项目的开展，不仅能加深对多波长被动锁模光纤激光器物理特性的理解，而且对光纤激光技术的发展具有重要的意义。

Multiwavelength passively mode-locked fiber lasers become one of the hot topics in field of lasers because of their important applications,such as in wavelength-division multiplexing optical communication,optical code division multiplexing system,optical fiber sensors,and optical measurments.Because most of the present multiwavelength pulsed fiber lasers need to insert a modulator in cavities, this project will employ micro/nano fiber graphene mode-locker to obtain stable multiwavelength passively mode-locked fiber lasers at room temperature.We will mainly investigate:(1)the effects of the structure of micro/nano fiber and the depositon degree of graphene on characteristics of mulitiwavelength pulses;(2)the achivement of multiwavelength pulses at ITU-T wavelength grid;(3)the temporal characters of the multiwavelength pulses and their internal mechanisms;(4)the impact of the net cavity dispersion on pulses characters;(5)the tunability of multiwavelength pulses. Through the above investigations, we will discover the internal mechanisms of multiwavelength passively mode-locked fiber lasers,design several simple,low cost and stable multiwavelength passively mode-locked fiber lasers,provide new ideas and technologies for multiwavelength pulsed lasers designing.Carrying out this project will not only enhance our understanding to the physical characteristics of multiwavelength passively mode-locked fiber lasers, but also has important value on the development of fiber lasers.