双光子染料ps激光泵浦下的超辐射和腔激射  

Superradiance and Cavity Lasing of Two-photon Absorption Dye Pumped by ps Laser

作　　者：周广勇[1] 王东[1] 王筱梅[1] 许心光[1] 邵宗书[1] 杨胜军[1] 赵显[1] 方奇[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,济南250100

出　　处：《光电子．激光》2002年第3期288-290,共3页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究规划资助项目 (G19980 164 0 2 )

摘　　要：本文首次报道了 ps激光脉冲泵浦下的有机染料的上转换腔激射。当用 10 6 4 nm激光 (40 ps)激发有机染料 PSPS[trans- 4 - (4 - pyrrolidinyl styryl) - N- m ethyl pyridinium methyl sulfate]时 ,可以得到中心波长分别为 6 15 nm和 6 2 0 nm的超辐射和腔激射。用再吸收现象解释了腔激射相对超辐射的红移现象 ,用不同条件下再吸收系数的不同解释了超辐射和腔激射相对双光子荧光的蓝移。该染料的 399ps的荧光寿命有利于腔激射的产生。我们得到了远大于泵浦光脉冲宽度的 2 0 0 ps激光振荡 。The properties of two photon absorption (TPA) induiced cavity lasing of organic dye of trans 4(4 pyrrolidinyl styryl) N methyl pyridinium methyl sulfate (PSPS) which was pumped by picosecond laser beam was firstly reported in this paper.TPA induced superradiance and cavity lasing with central wavelengths located at 615 and 620 nm can be obtained when PSPS solution in benzyl alcohol was pumped by 1 064 nm laser beam.There is 5 nm red shift of cavity lasing to superradiance,which is from the re absorption effect.The blue shifts of cavity lasing and superradiance to TPA are from the difference of re absorption coefficient at different conditions.The lifetime of TPA is 399 ps.Laser oscillation longer than 200 ps was obtained.

关 键 词：双光子染料 激光泵浦 双光子吸收 腔激射 超辐射 

分 类 号：TN248.3[电子电信—物理电子学]