机构地区: 天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室
出 处: 《中国激光》 2010年第6期1585-1588,共4页
摘 要: 利用掺镱大模场面积光子晶体光纤飞秒激光放大器作为抽运源,在高非线性光子晶体光纤中产生了可见光波段增强的超连续光谱。光纤色散曲线经过特殊设计,使得红移孤子波与可见光波段蓝移色散波群速度匹配更好,在光纤中同时传输,并通过四波混频持续发生相互作用,提高了超连续光谱中的可见光成分。实验得到了3.95 W的高功率超连续输出,其中可见光波段占1.2 W。进一步数值模拟表明,增大光纤空气填充率和减小纤芯直径可以增强孤子波与色散波的互作用,使光谱的可见光成分得到进一步增强。 The experimental study on visible light enhanced supercontinuum generation pumped by Yb-doped large mode area photonic crystal fiber laser amplifier is reported.The high nonlinear photonic crystal fiber has suitable dispersion making the red shifted soliton and blue shifted dispersion wave have a same group velocity.They move together in the fiber and interact with each other through four wave mixing.A 3.95 W high power supercontinuum was obtained with 1.2 W in the visible region.The optimization of fiber structures was numerically designed.As a result,the fiber with smaller core size or larger air filling fraction can shift the wavelength to blue.
领 域: [电子电信]