双光子吸收染料HMASPS上转换及非线性吸收性能的研究  

Upconversion and Nonlinear Absorption Properties of Two-photon Absorption Dye: HMASPS

作　　者：王东[1] 任燕[1] 周广勇[1] 王春[1] 邵宗书[1] 蒋民华[1] 

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《中国激光》2002年第1期61-64,共4页Chinese Journal of Lasers

基　　金：国家重点基础研究计划项目 (批准号:G19980 6 140 2 )资助

摘　　要：从实验上研究了一种染料trans 4 [p (N hydroxyethyl N methylamino)styryl] N methylpyridinium p toluenesulfonate(简称HMASPS)双光子抽运的频率上转换及双光子吸收引起的非线性吸收情况。当抽运功率密度超过一定阈值时 ,染料发出超辐射荧光。测量了从 90 0～ 115 0nm抽运波长范围的荧光激射上转换效率和 72 0～ 110 0nm范围的非线性吸收情况。在 92 0nm处具有最大有效双光子吸收截面 44 3× 10 -4 8cm4 s/ photon ,在 10 6 4nm处为2 77× 10 -4 8cm4 s/photon。最高上转换效率 7%位于 990nm ,而在 10 6 4nm为 4 3%。Two photon pumped frequency upconversion and the two-photon absorption (TPA) induced nonlinear absorption of a dye, trans-4-[p-(N-hydroxyethyl-N-methylamino)styryl]-N-methylpyridinium p-toluene sulfonate (abbreviated as HMASPS) have been experimentally investigated. The dye exhibits strong superradiation properties when the pumping power is above its threshold. Furthermore, the lasing upconversion efficiencies from 900 to 1150 nm and the nonlinear absorption from 720 nm to 1100 nm have been measured. The largest effective molecular TPA cross section was measured to be 44.3×10 -48 cm 4s/photon at 920 nm. At 1064nm, it was 2.77×10 -48 cm 4s/photon. The highest upconversion efficiency is 7% at 990 nm, whereas 4.3% at 1064 nm.

关 键 词：染料 HMASPS 双光子吸收 非线性吸收 上转换 抽运功率密度 

分 类 号：O437[机械工程—光学工程]