一种新型的利用重构等效啁啾超结构光纤光栅消啁啾技术研究  

A novel method of chirp elimination using reconstruction equivalent chirp superstructured fiber Bragg grating

作　　者：郑吉林[1] 王荣[1] 方涛[1] 卢麟[1] 蒲涛[1] 陈向飞[2] 

机构地区：[1]中国人民解放军理工大学通信工程学院,光信息技术实验室,南京210007 [2]南京大学微结构国家实验室,南京210093

出　　处：《物理学报》2009年第10期7017-7024,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60502003);江苏省自然科学基金(批准号:BK2007501)资助的课题~~

摘　　要：提出了一种利用重构等效啁啾超结构光纤光栅对啁啾光脉冲进行频域消啁啾和时域脉宽压缩的方法.由于重构等效啁啾技术可实现任意物理可实现滤波特性的光纤光栅,因此所提出的新型消啁啾方法可以针对任意啁啾模型的脉冲.仿真结果表明,对于脉宽为20ps,啁啾系数为-5,啁啾模型为线性、高斯型、洛仑兹型的啁啾高斯脉冲,其被消啁啾后时间带宽积分别由初始的2.25,2.65,2.50下降到0.458,0.708,0.731,脉宽压缩效果明显.针对商业软件给出的增益开关分布反馈半导体激光器输出光脉冲的模型,实际制作相应的重构等效啁啾超结构光纤光栅对该啁啾脉冲进行消啁啾,脉宽由初始的25ps被压缩为5ps,大部分啁啾都被消除,实验结果与数值仿真符合很好.A novel chirp elimination and pulse compression method is firstly proposed using reconstruction equivalent chirp superstructured fiber Bragg grating（REC-SSFBG）.Based on the feasibility of REC technology for any physical realizable target response,this novel chirp elimination method is suited for any model of chirped pulse.The simulation results show that the time bandwidth product decrease from 2.25,2.65 and 2.50 to 0.458,0.636 and 0.73 for linearly chirped,Gauss chirped and Lorentz chirped pulses, respectively. The original pulsewidth is 20 ps and the chirp coefficients is - 5 for all the three cases. Further experiment is performed with a fabricated REC-SSFBG to compress a chirped pulse generated from commercial software with model of gain-switched distributed feedback laser diode. The pulsewidth decreases from 25 ps to 5 ps, which agrees well with the simulation.

关 键 词：重构等效啁啾 光纤光栅 啁啾 增益开关分布反馈半导体激光器 

分 类 号：TN253[电子电信—物理电子学]