Analysis on diffraction efficiency of PQ:PMMA-based volume Bragg grating using detailed rate equations

• Main Authors: Bao-Jen Shih, 施堡仁
• Other Authors: Te-Yuan Chung
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/7aex2a

碩士 === 國立中央大學 === 光電科學與工程學系 === 104 === A simulated research based on rate equation was performed to analysis the concentration distributions of molecules in phenanthrenequinone (PQ)-doped PMMA polymer (PQ:PMMA) which was exposed by two beam interference configuration. The concentration distributions were used to predict the diffraction efficiency of PQ:PMMA based volume Bragg grating (VBG) by using transfer matrix method. The simulation result indicated that diffusion effect of PQ molecule was the most important factor that influences the final diffraction efficiency of PQ:PMMA VBG. The simulation result suggested that intermittent exposure method can promote the diffusion of PQ molecule and increase the final diffraction efficiency. A series of experiment validated that the diffraction efficiency of reflective type PQ:PMMA VBG can be predicted.