Investigation of the polyetherketone guest-host DR1/PEK-c polymer films by real-time monitoring of the second-harmonic generation

摘要

The real-time monitoring of the second-harmonic generation (SHG) was used to optimize the poling condition and to study the nonlinear optical (NLO) properties of the polyetherketone (PEK-c) guest-host polymer films. The high second-order NLO coefficient X~(2)_33 = 11.02 pm/v measured at 1.064 um was achieved when the weight percent of DR1 guest in the polymer system is 20. The NLO activity of the poled DR1/PEK-c polymer film can maintain more than 80 of its initial value when temperature is under 100 deg C, and the normalized second order NLO coefficient can maintain more than 85 after 2400s at 80 deg C.