An effective method to enhance working temperature range of lasers from dye-doped cholesteric liquid crystals

Stable and homogeneous dye-doped cholesteric liquid crystals (DDCLCs) were prepared. The lasers generated from DDCLCs can be tuned by temperature, and the working temperature range of DDCLCs was from 20 °C to 60 °C. After adding bi-functional monomer RM257 and photoinitiator Irgacure 2959, the working temperature range of lasers from DDCLCs was enhanced from 20-60 °C to 20-70 °C.