Subpicosecond electro-optic Imaging Using Interferometric And Polarimetric apparatus

摘要

This communication describes an interferometric and a polarimetric ultrafast electro-optic imager, each capable of imaging the voltage distribution over a rectangular region of an ( opto)electronic device. The detector is a commericial 2-dimensional (2-D) charge-coupled-device (CCD) array having a limited dynamic range. Our analysis focuses on techniques that take advantage of the speed and convenience of a CCD measurement system and overcome the dynamic-range limitations of CCD's. Experimental results obtained with a non-optimized polarimeter having a voltage sensitivity of approx 1.8 V are presented. Theoretical voltage senitivity for an interferometric system is 270 mV.