渐变折射率多模光纤产生可见光超连续谱研究进展
Research Advances of Visible Supercontinuum Generation in Graded-Index Multimode Fibers
李敬岁 1李博 1张丹 2陈胜平 2许晓军2
作者信息
- 1. 国防科技大学前沿交叉学科学院,湖南 长沙 410073
- 2. 国防科技大学前沿交叉学科学院,湖南 长沙 410073;国防科技大学南湖之光实验室,湖南 长沙 410073;脉冲功率激光技术国家重点实验,湖南 长沙 410073
- 折叠
摘要
渐变折射率多模光纤中存在几何参量不稳定性等时空非线性效应,在一定条件下会使传输激光的光谱逐渐展宽,最终演化为超连续谱.本文介绍了几何参量不稳定性的概念、物理内涵以及利用渐变折射率多模光纤获得可见光超连续谱的研究现状,分析了光纤参数、脉冲参数对输出光谱的影响,提出实现全光纤结构以及采用短波长激光作为泵浦源是今后研究的重点方向.利用几何参量不稳定性产生可见光超连续谱有望突破传统光子晶体光纤产生可见光超连续谱方案因纤芯过小造成的功率限制.
Abstract
Typically,graded-index multimode fibers feature certain spatiotemporal nonlinear effects such as geometric parametric instability(GPI),which gradually expands the spectrum of transmitted laser light under certain conditions and eventually evolves into a supercontinuum.This paper introduces the concept of GPI and its physical connotations;moreover,the status of research on GPI-induced visible supercontinuum generation in graded-index multimode fibers is reviewed,and an analysis on the influence of fiber and pulse parameters on the output spectrum is presented.In addition to this,realizing an all-fiber structure and using short wavelength lasers as pump sources constitute key future research directions.Overall,the GPI-induced generation of the visible supercontinuum is expected to break through the power limitation of the supercontinuum generated by small core traditional photonic crystal fibers.
关键词
光纤光学/可见光超连续谱/渐变折射率多模光纤/空间自成像/几何参量不稳定性Key words
fiber optics/visible supercontinuum/graded-index multimode fibers/spatial self-imaging/geometric parametric instability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据