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

The real-time monitoring of the second-harmonic generation (SHG) was used t o optimize the poling condition and to study the nonlinear optical (NLO) pr operties of the polyetherketone (PEK-c) guest-host polymer films. The high second-order NLO coefficient chi(33)((2)) = 11.02 pm/v measured at 1.064 mu m 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 m ore than 80% of its initial value when temperature is under 100 degrees C, and the normalized second-order NLO coefficient can maintain more than 85% after 2400 s at 80 degrees C. (C) 2000 Elsevier Science Ltd. All rights res erved.