利用正常色散微结构光纤产生平坦的超连续谱  

Flat Supercontinuum Generation in a Microstructure Fiber with Normal Dispersion

作　　者：徐永钊[1] 任晓敏[1] 王子南[1] 张霞[1] 黄永清[1] 

机构地区：[1]北京邮电大学光通信与光波技术教育部重点实验室,北京100876

出　　处：《光电子．激光》2007年第8期889-892,共4页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展计划"973"资助项目(2003CB314906);教育部科学技术研究重大项目基金资助项目(104046);北京市教育委员会共建资助项目(XK100130437)

摘　　要：利用1.7ps、中心波长为1565nm和重复率为10GHz光脉冲入射到80m具有小正常色散的色散平坦高非线性微结构光纤（HNL-MF）中，在通信波段获得平坦展宽超过100nm的超连续谱。除了在泵浦波长附近几nm波长范围内具有小的谱峰外，超连续谱在1512～1612nm内具有±3dB的平坦度。同时研究了不同泵浦波长情况下超连续谱产生的情形，由于不同泵浦波长处光纤的色散斜率不同，因此对超连续谱对称性产生一定的影响，色散斜率越小，产生的谱的对称性也越好。A flat supercontinuum with over 100 nm in the telecommunication band is generated by injecting 1565 nm,1.7 ps, 10 GHz repetition rate optical pulses into an 80 m-long dispersion-flattened highly nonlinear microstructure fiber with small normal dispersion. The generated supercontinuum ranging from 1 512 to 1 612 nm has the flatness of ±3 dB, except that within several nanometers around the pump wavelength a small spectral peak is residual. Furthermore,the supercontinuum generation at different pump wavelength is also studied. The results show that the symmetries of the generated supercontinuum spectra are affected by the dispersion slope of the fiber. The smaller the dispersion slope at the pump wavelength is the more symmetrical is the generated supercontinuum spectrum.

关 键 词：微结构光纤(MF) 光子晶体光纤(PCF) 超连续谱 自相位调制(SPM) 

分 类 号：TN253[电子电信—物理电子学]