Terahertz quantum cascade amplifier

Ren, Y. and Wallis, R. and Shah, Y. D. and Jessop, D. S. and Degl'Innocenti, Riccardo and Klimont, A. and Kamboj, V. and Beere, H. E. and Ritchie, D. A. (2015) Terahertz quantum cascade amplifier. In: 26th International Symposium on Space Terahertz Technology, ISSTT 2015. International Symposium on Space Terahertz Technology, USA.

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Abstract

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.

Item Type:
Contribution in Book/Report/Proceedings
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
ID Code:
89613
Deposited By:
Deposited On:
10 Jan 2018 14:08
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:47