1-(2-吡啶偶氮)-2-萘酚薄膜的非线性光学特性研究

Nonlinear Optical Properties of 1 (2 Pyridylazo) 2 Naphthol Thin Film

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，

The nonlinear optical properties of 1 (2 pyridylazo) 2 naphthol film were studied by using Z scan technique with ps pulse laser at 532 nm. Under the condition of the lower input pulse enrgy, the resonance third order nonlinear susceptibility χ (3) R  and nonlinear absorption coefficient β were measured to be 1.29×10 -9 esu and 42 cm/GW, respectively. The nonlinear absorption responding to the pulse energy was studied and it was found that the reverse saturable absorption turns into the saturable absorption with the increasement of pulse energy.