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利用低光强曝光进行全息液晶/聚合物光栅(HPDLC)的制备,获得了内部无液晶微滴具有聚合物支撑形貌的低散射透射光栅结构.分别研究了染料PM567,DCM,DCJTI的放大的自发辐射(ASE)阈值及相对出射光强等性质,得到三种染料中DCJIT的ASE阈值最低,相对出射光强最高,表明DCJTI更适于制备低阈值、高转化效率激光器.分别采用这三种染料制备基于聚合物支撑形貌光栅的分布反馈式激光器,通过改变光栅周期得到不同出射波长的激光.其中,以DCJTI为工作物质,得到中心波长为648 nm,阈值为0.65μJ/pulse,转化效率为1.6%,线宽为0.3 nm的高性能激光.与国内外同类激光器相比,在阈值、转化效率、线宽三个方面均有不同程度的提高.
The preparation of holographic liquid crystal / polymer gratings (HPDLC) by using low intensity light exposure and obtaining a low scattering transmissive grating structure with no liquid crystal droplet on the polymer support morphology were studied.The effects of dye, PM567, DCM and DCJTI (ASE) threshold and relative exiting light intensity, DCJIT has the lowest ASE threshold and the highest relative light intensity, which shows that DCJTI is more suitable for preparing low threshold and high conversion efficiency lasers.Three kinds Dye preparation Distributed feedback laser based on grating supported by polymer, the laser with different exit wavelength was obtained by changing grating period.With DCJTI as working material, the central wavelength was 648 nm, the threshold was 0.65μJ / pulse, the conversion efficiency Which is 1.6% and the linewidth is 0.3 nm.Compared with similar lasers at home and abroad, the threshold, conversion efficiency and linewidth are all improved to some extent.