掺镱光纤激光器中的色散管理耗散孤子  

Dissipative Dispersion-Managed Solitons in Yb-Doped Fiber Laser

作　　者：李辉辉[1] 刘江[1] 孙若愚[1] 金东臣 王璞[1] 

机构地区：[1]北京工业大学激光工程研究院、国家产学研激光技术中心,北京100124

出　　处：《中国激光》2013年第B12期1-4,共4页Chinese Journal of Lasers

基　　金：北京市自然科学基金重点项目（KZ2011100050011）

摘　　要：通过数值模拟研究了掺镱光纤激光器中色散管理耗散孤子的产生。利用在1μm处负群速度色散特性的空芯光子晶体光纤，对掺镱光纤激光器进行色散管理，分析耗散孤子在腔内传输时各元器件对脉冲宽度和光谱宽度的影响。带有正啁啾的色散管理耗散孤子随着腔内净正色散值的减小，时间带宽积逐渐增大，通过在腔外进一步压缩得到最短90fs的脉冲。包含正、负色散元件的锁模光纤激光器产生的色散管理耗散孤子比普通的色散管理孤子具有更高的脉冲能量，掺镱光纤的增益色散和可饱和吸收体的振幅调制对孤子的形成起到很大的作用。The dispersion-managed passively mode-locked Yb-doped fiber laser is designed, using negative group velocity dispersion characteristics of photonic crystal fiber at 1 μm wavelength. The net group velocity dispersion of the fiber laser is normal. Larger pulse energy can be generated from this laser. The generation of the dissipative dispersion-managed soliton is studied through numerical simulation. The amplitude modulation of the saturated absorber and the gain dispersion of the Yb-doped fiber play significant roles in the formation of the soliton. The effects of the positive and negative dispersion elements on the pulse width and spectrum width are analyzed. The time bandwidth product increases gradually with the net group velocity dispersion value decreasing. The shortest pulse of 90 fs width is obtained through further compression.

关 键 词：激光器 耗散孤子 数值模拟 色散管理 

分 类 号：TN248.1[电子电信—物理电子学]