【摘要】 利用z扫描技术研究了一种偶氮聚合物在连续激光作用下的热致非线性光学特性,并根据实验结果计算了偶氮聚合物的热光系数dn/dT和热致非线性折射率n2.由实验结果,发现样品的热光系数和热致非线性折射率与激发波长及样品在该波长下的线性吸收的强弱有关.更多还原

【Abstract】 We investigated the thermal induced optical properties of Azo polymer by z-scan technique for the first time. Both 488nm and 632.8nm cw laser were used for excitation.The result showed that the optical nonlinear refractions of the polymer under cw laser resulted from the thermal effect, and they had no nonlinear absorption.By combining experimental curves and the thermal effect theory,we calculated the thermoptical coefficient dn/dT and the thermal-induced refractive index n₂ of the polymer.更多还原