# Sum-frequency generation

> nonlinear optical process

**Wikidata**: [Q3123190](https://www.wikidata.org/wiki/Q3123190)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sum-frequency_generation)  
**Source**: https://4ort.xyz/entity/sum-frequency-generation


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)