We will perform research into an optical memory device technology which shows the potential of providing a replacement for mechanical-magnetic tape recorders currently used in spacecraft, but with significantly higher reliability. The technology is based on the photon echo phenomenon, and provides storage capacity increases (up 10 (15) bits) as well as the required continuous operation of seven years without external maintenance, non-destructive readout, provision for incorporating security safeguards, radiation hardening, improved access time, compatibility with magnetic recorders on existing space systems, and the potential for space qualification. We will perform a state-of-the-art survey of the technologies and materials on which the feasibility of a photon echo memory depends, including detailed analyses of system parameters. We will also develop a plan for the conduct of phase ii of the project, including a delineation of resources. The photon echo memory is ultimately intended to be interfaced with the results of current and proposed large scale R&D programs directed to advancing the state-of-the-art of computer systems, e.g., the Very High Speed Integrated Circuit (VHSIC) program, optical switching research, and the recent government response to the Japanese 5th generation computer program.
