# Backpropagation through nonlinear units for the all-optical training of neural networks

> Research article (Photonics Research, 2021) · cited 88× · AI/ML

**Wikidata**: [openalex:W3135320274](https://www.wikidata.org/wiki/openalex:W3135320274)  
**Source**: https://4ort.xyz/entity/backpropagation-through-nonlinear-units-for-the-all-optical-training-of-neural-networks