K2 Optronics Inc. has appointed Paul Zorabedian as chief technical officer and vice president of advanced product development and Subrata Dey as vice president of engineering and new product introduction.  . . .   Input/Output Inc., through its wholly owned subsidiary Applied MEMS Inc., has been selected by Continuum Photonics Inc. to develop the core micro-electrical-mechanical (MEMS) components of Continuum's DirectLight line of optical switches.