Measurement of nonliear refractive index in PPV derivative/chloroform solution
-
1.
College of Physics and Information Optic-electronics, Henan University, Kaifeng 475001, China;
-
2.
State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics, the Chinese Academy of Sciences, Xi'an 710068, China
-
Received Date:
2003-08-25
Accepted Date:
2003-11-10
-
Abstract
The experiment of the laser-induced diffraction in poly-phenylene vinylene(PPV) derivative/chloroform solution is made by using the 532nm continuous laser.According to the number of the diffraction rings,the Kerr constant and nonlinear refractive index of the material can be estimated.It is found that:when input-power reaches the threshold 0.77mW but less than 3.36mW,it is mainly Kerr effect that causes the diffraction rings owing to spatial self-phase modulation while the Gaussian beam passing through the nonlinear medium.Therefore,the Kerr constant γ of PPV/chloroform solution (absorption cofficient 4.76cm-1 at 532nm) is about 5.55×10-10m2/W and the nonlinear refractive index n2 is probably 9.21×10-4esu.But as input-power is increased,diffraction rings caused by thermo-optic effect submerge diffraction rings caused by Kerr effect.
-
-
References
|
[1]
|
郑敏,白凤莲,朱道本.聚(对苯撑乙烯)发光材料 [J].感光科学与光化学,1997,15(4):357～362.
|
|
[2]
|
黄艳萍,王丽英,陈树德 et al.偶氮苯衍生物三阶非线性的四波混频研究 [J].光学学报,1998,18(10):1290～1294.
|
|
[3]
|
黄艳萍,王深仪,孙真荣 et al.细菌视紫红质三阶非线性的四波混频 [J].科学通报,2000,45(10):1029～1032.
|
|
[4]
|
贾振红,李勋,周骏.用THG法测量液体三阶非线性极化率χ (3) [J].量子电子学报,1997,14(3):248～253.
|
|
[5]
|
TORRES R Q,THAKUR M.Measurement of the nonlinear refractive index of polydiacetylene using Michelson interferometry and z-scan [J].J A P,1999,85(1):401～403. |
|
[6]
|
MANSOOR S B,ALI A S,TAI W H et al.Sensitive measurement of optical nonlinearities using a single beam [J].IEEE J Q E,1990,26(4):760～769. |
|
[7]
|
任立勇.π共轭聚合物非线性光学特性的实验和理论研究 [D].西安:西北大学,2000.26～31.
|
|
[8]
|
CHONG H K,YEUNG L L,SEONG G K.Analysis of asymmetric z-scan measurement for large optical nonlinearities in an amorphous As2S3 thin film [J].J O S A,1999,B16(4):600～604. |
|
[9]
|
DURBIN S D,ARAKLIAN S M,SHEN Y R.Laser-induced differaction rings from a nematic-liquid-crystal film [J].Opt Lett,1981,6(9):411～413. |
|
[10]
|
顾玉宗,梁志坚,干福喜.酞菁掺杂有机改良性溶胶-凝胶材料的自衍射及限幅特性 [J].光学学报,2001,21(9):1053～1054.
|
|
[11]
|
TIAN J G,ZHANG Ch P,ZHANG G Y et al.Position dispersion and optical limiting resulting from thermally induced nonliearities in Chinese tea liquid [J].Appl Opt,1993,32(33):6628～6631. |
|
[12]
|
KOVSH D I,YANG S,HAGAN D J et al.Nonlinear optical beam propagation for optical limiting [J].Appl Opt,1999,38(24):5168～5180. |
-
-
Proportional views
-
Map
DownLoad: