That's a digital processor using optics to send/receive data, rather than electricity. It's using a similar method to fibre optics. The pulses of light are still representing 1s and 0s as you'd expect from a digital computer.
An analogue computer is not digital in any way. Everything is discreet voltages which can be varied, not 1s and 0s. A calculation is done by physically patching it to manipulate voltages in varying ways eg. adding 2v and 2v gives 4v, which is basic arithmetic.
A "real" computer is literally just a person counting manually, maybe using a few tools in the process to aid in the calculation. In fact, a "computer" was a legit job position back in the 50s - literally paid to manually do calculations.
You see the difference, right?