EFFECTS OF THE BIAS-CONTROLLED GRID ON PERFORMANCES OF THE CORONA POLING SYSTEM FOR ELECTRO-OPTIC POLYMERS

The corona poling system for electro-optic polymers with a bias-controlled grid is experimentally studied. The relationship between the corona threshold voltage and the grid bias voltage is researched. There is a minimum in the corona threshold voltage versus grid bias voltage curve. Effects of the grid bias voltage, the mesh size and the grid electrode position on performances of the poling system are discussed and analyzed. The experimental results show that the grid electrode can enlarge the corona discharge dynamic range and control the poling current in a wide range, grid electrodes with different mesh sizes and grid-plate gaps have different effects on performances of the poling system, and the grid electrode should be near the plate electrode to acquire stable corona discharge.