【摘要】 本文介绍新合成的化合物——DPDO系列的工作特性.给出了它的吸收光谱和荧光光谱;测得了在N₂激光泵浦下的激光调谐曲线:工作区域在371～395nm,激光转换效率高于同波段的常用激光染料BPBD一倍左右;光化学性能稳定,用N₂激光连续泵浦8小时染料激光输出不变.在DPDO系列中,具有对称中心的类型I比相应的没有对称中心的类型II的激光转换效率高,而且峰值波长红移.更多还原

【Abstract】 This paper describes the characteristics of laser dye DPDO series which are new compounds of the 2, 6-di(p-, -m-, or o- substituted phenyl) -benzo -bisoxazols. Typical absorption spectra and fluorescence spectra of DPDO are given, and the tuning curves of dye laser with such compounds excited by N2 laser are measured. It is found that the DPDO series are working in the spectral region of 371 to 394 nm and having the conversion efficiency approximately double to that of BPBD. The DPDO series also have good photochemical stability. The output of dye laser does not decrease after eight hours nitrogen laser excitation at 200kW peak power and 5Hz repetition rate. The dye solution can be used at intervals and preserved for 2-3 years but yet maintains its performance.The series of DPDO can be divided into two types according to their structures. Type I with symmetric center structure has higher conversion efficiency but more "red" peak wavelength than type II which has not a symmetric center.更多还原