胆甾相液晶激光器的调谐特性研究

Tunable capability of dye-doped cholesteric liquid crystal lasers

基于胆甾相液晶螺距及折射率随温度与电场变化的特性,研究了温度与电场对液晶染料可调谐激光器发射特性的影响.首先探讨了手性剂浓度、温度与液晶螺距的关系,制作了液晶染料可调谐激光器,在温度23—35℃变化时,其发射波长调谐范围为618.90—594.76nm,达到24.14nm,在电压0—9V变化时,其发射波长调谐范围为617.40—608.11nm,共9.29nm.

Based on the fact that helical pitch and average refractive index of a cholesteric liquid crystal is electric-tunable and temperature-tunable, we have designed dye-doped cholesteric liquid crystal （CLC） lasers. First, the effects of the concentration of chiral and the temperature on helical pitch are investigated. Next, we gain the relationship of tunable laser with temperature and electric field. When the temperature is changed from 23 to 35℃, the wavelength shift of the lasing peak vasies from 618.90 to 594.76 nm, nearly 24.14 nm in total; when the electric field is changed from 0 to 9 V, the wavelength shift of the lasing peak ehanges from 617.40 to 608.11 nm, nearly 9.29 nm in total.