# Heterodyne Spectroscopy of Frequency Instabilities in Terahertz Quantum-Cascade Lasers Induced by Optical Feedback

> Research article (IEEE Journal of Selected Topics in Quantum Electronics, 2017) · cited 18× · AI/ML

**Wikidata**: [openalex:W2595417202](https://www.wikidata.org/wiki/openalex:W2595417202)  
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