Photon-Induced Borate Groups Transformation by Femtosecond Laser  

作　　者：杨晓燕 余昺鲲 姜雄伟 曾慧丹 

机构地区：[1]Department of Physics, College of Science, Shanghai University [2]Photon Craft Project, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences [3]Japan Science and Technology Corporation, Japan

出　　处：《Journal of Shanghai University(English Edition)》2003年第1期55-59,共5页上海大学学报（英文版）

基　　金：theNationalNaturalSciencesFoundationofChina (GrantNo .5 983 2 0 80 )

摘　　要：In this paper, we put emphasis on the analysis the mechanism of the photon induced frequency conversion β BaB 2O 4 crystal inside a borate glass using femtosecond laser. Because of the nature of femtosecond laser's ultra short pulse duration and high energy density, in essence the laser glass interaction mechanism is changed. Based on multiphoton ionization, collisional ionization and the network depolymerization in the borate glass, production of the plasma drives the microstructure rearrangement near the laser beam focusing area. From the structure of glass and crystal analysis, we conclude that the complicated borate groups containing BO 3 and BO 4 units inside the glass are converted into(B 3O 6) -3 anion rings.In this paper, we put emphasis on the analysis the mechanism of the photon induced frequency conversion β BaB 2O 4 crystal inside a borate glass using femtosecond laser. Because of the nature of femtosecond laser's ultra short pulse duration and high energy density, in essence the laser glass interaction mechanism is changed. Based on multiphoton ionization, collisional ionization and the network depolymerization in the borate glass, production of the plasma drives the microstructure rearrangement near the laser beam focusing area. From the structure of glass and crystal analysis, we conclude that the complicated borate groups containing BO 3 and BO 4 units inside the glass are converted into(B 3O 6) -3 anion rings.

关 键 词：femtosecond laser multiphoton absorption collisional ionization network depolymerization. 

分 类 号：TN248[电子电信—物理电子学]