无机基复合固态染料激光介质光衰退机制研究

Research on doping a photoactive organic phase into a transparent inorganic host matrix at molecular level to obtain optical composite has been intensified in recent years. The solid dye gain medium and laser appear to be promising for potential applications in military, IT, science research, medicine and so on. Poor photo-stability of the dye doped in the solid host, however, has been the major limitation of the practical solid-sate dye laser medium because of the absence of dye reservoirs and circulation systems..This project is devoted to the fundamental research on the mechanisms of the photodegradation of laser dyes doped in solid host media. Following research results are achieved: (1) A in-situ, speediness characteristic method was applied to study the mechanisms of the photodegradation of the dye in solid hosts. (2) The influences of the component and structure of the hybrid materials on the therml- and photo-stability were studied. Singlet state oxygen plays the main role of phtotdegradation of the laser dyes in hybrid solids. (3) A multi-step process was invented to prepare the solid dye gain medium with high photo-stability. The derived laser medium has following laser performances: 57.8% slope efficiency, laser lifetime of 106000 pulses with an output reduction of less than 15%, tunable range of 50 nm (547~598.2 nm), 70 mJ laser threshold..

研究建立一种原位、即时研究测定无机基复合固态可调谐染料激光介质光化学行为及光损伤机制的新方法；揭示无机基质组成、结构、形态等对有机激光染料光衰退动力学的影响及其控制规律；阐明复合固态激光介质激发态过程与激光机制及控制原理。为制备高效、稳定、可靠等综合优异性能无机基复合固态染料激光介质并拓展其研究和应用领域提供理论依据。