[andrewjrangel]

So the optical component is only the end result model of the NN? It isn't learning using the optics?

[dekhn]

Only indirectly. the physical device only does feedforward so they had to train it using tensorflow on a conventional device.

[cheeko1234]

Check out this new article:

https://www.osa.org/en-us/about_osa/newsroom/news_releases/2...

They implemented a back propagation algorithm using just optical.

[dqpb]

Which is unfortunate, since learning is the compute intensive part