运用Ｚ扫描方法研究了１－（２－吡啶偶氮）－２－萘酚薄膜的非线性光学特性。用皮秒脉冲激光测得在５３２ ｎｍ 处、光强较低时χ（３）Ｒ ＝ １．２９×１０－ ９ ｅｓｕ， β＝ ４２ ｃｍ ／ＧＷ； 同时研究了不同光脉冲能量时的非线性吸收特性， 发现其非线性吸收随着光强的增大由反饱和吸收转为饱和吸收 The nonlinear optical properties of 1- (2-pyridylazo) -2-naphthol thin films were studied by Z-scan method. With picosecond pulsed laser, χ (3) R = 1.29 × 10- 9 esu and β = 42 cm / GW were measured at 532 nm at low light intensities. The effects of different light pulse energies on the nonlinearity Absorption characteristics and found that the non-linear absorption increases with light intensity from the reverse saturable absorption to saturated absorption