InPhase Technologies reckons it can squeeze 200 gigabits on a single square inch of optical disk. This company showed off its holographic prototype at the National Association of Broadcasters (NAB) convention in Las Vegas this week InPhase said is uses a patented polytopic recording method to squeeze 300 gigabytes (GB) capacity on a single disk. It says that by 2009 it will be selling disks with up to 1.6 terabyte (TB) capacity.