Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
| Publication date | 2015 |
|---|---|
| Host publication | 26th International Symposium on Space Terahertz Technology, ISSTT 2015 |
| Publisher | International Symposium on Space Terahertz Technology |
| <mark>Original language</mark> | English |
| Event | 26th International Symposium on Space Terahertz Technology, ISSTT 2015 - Cambridge, United States Duration: 16/03/2015 → 18/03/2015 |
| Conference | 26th International Symposium on Space Terahertz Technology, ISSTT 2015 |
|---|---|
| Country/Territory | United States |
| City | Cambridge |
| Period | 16/03/15 → 18/03/15 |
| Conference | 26th International Symposium on Space Terahertz Technology, ISSTT 2015 |
|---|---|
| Country/Territory | United States |
| City | Cambridge |
| Period | 16/03/15 → 18/03/15 |
We have demonstrated a terahertz (THz) optical amplifier based on a 2.9 THz quantum cascade laser (QCL) structure. By depositing an antireflective coating on the QCL facet, the laser mirror losses are enhanced to fully suppress the lasing action, creating a THz quantum cascade (QC) amplifier. Terahertz radiation amplification has been obtained, by coupling a separate THz QCL of the same active region design to the QC amplifier. A maximum optical gain as large as 30 dB with single-mode radiation output is demonstrated. Furthermore, a THz imaging system based on the effect of self-mixing in this QC amplifier has also been demonstrated.