具有外部谐振腔的胆甾相液晶激光器的研究  

Cholesteric Liquid Crystals Laser With External Cavity

作　　者：张伶莉[1] 孙秀冬[1] 刘永军 陈丹[2] 荀显超[3] 

机构地区：[1]哈尔滨工业大学物理系,黑龙江哈尔滨150000 [2]哈尔滨工程大学理学院,黑龙江哈尔滨150000 [3]空军航空大学飞行基础训练基地基础部,吉林长春130022

出　　处：《液晶与显示》2013年第5期679-682,共4页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.61107059);黑龙江省博士后基金(No.LBH-Z09184)

摘　　要：制备具有外部谐振腔的胆甾相液晶激光器件。采用镀有多层膜的ITO玻璃作为基板,取向后制备1D-PC/CLC/1D-PC结构的胆甾相液晶激光器件。该激光器件在532 nm的Nd:YAG倍频脉冲激光器泵浦下能够出射双模激光。出射激光峰位分别位于600 nm和650 nm,对应于胆甾相液晶的短波边缘和长波边缘,并且激光的发射阈值明显低于普通的盒式胆甾相液晶激光器件。此激光器件可以通过电压控制在单模发射和多模发射之间切换,电控的阈值电压仅为6 V。This work reports the CLC laser based on the combination of dye-doped CLC and a PC consisting of SiO2 and TiO2 multilayers, with the structure as 1D-PC/dye-doped CLC/1D-PC. The device exhibits two-mode laser action. The wavelength lasers are at 600 nm and 650 nm, corresponding to the short-and long-wavelength band edges respectively. In this system, the lasing threshold is much lower than that in simple CLC cell without the PC. Additio-nally, two-mode laser can be switched to single-mode laser by applying above 6 V voltage.

关 键 词：激光器 胆甾向液晶 多层膜 

分 类 号：O753.2[理学—晶体学]