摘要
PDABS-1[5-(2-硫甲基-4-甲基)-嘧啶基-戊二炔-1-醇-4-N,N二甲氨基偶氮苯-4-磺酸酯]THF溶液的三阶光学非线性极化率χ(3)的Z-扫描测试显示在单光子吸收区附近该材料的非线性由饱和吸收所支配。在波长为532nm,脉宽为100ps的激光作用下,其非线性极化率实部Reχ(3)为-4.200×10-9esu,对应的非线性折射率值n2为-1.299×10-11esu<0,属自散焦材料。
A fiberoptical combustion sensing system is introduced here.It can be applied to measure the curves of spectra luminous intensities variations of combustion flame in internal combustion engines.In this experiment,the curves of luminous intensity variations of three characteristic spectra CH(431nm)、C2(516nm)and H2O(588nm)under different operational conditions are measured.The results show that the obtained curves reveal trhe actual goodness of combustion process,and the time characteristics of combustion can be displayed on these curves.So the curves can be used to make combustion diagnosis and analysis.The opticalfiber combustion sensor developed can be used as feedback control sensor in modern engine management system.
出处
《光电子.激光》
EI
CAS
CSCD
1998年第3期244-247,267,共5页
Journal of Optoelectronics·Laser
关键词
Z-扫描
有机
非线性光学材料
characteristic spectra
combustion diagnosis
opticalfiber sensor
gasoline engine