| Autor: |
Keeley, J, Bertling, K, Rubino, PL, Lim, YL, Taimre, T, Qi, X, Kundu, I, Li, LH, Indjin, D, Rakic, AD, Linfield, EH, Davies, AG, Dean, P |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| ISSN: |
0146-9592 |
| Popis: |
We report on the high detection sensitivity of a laser feedback interferometry scheme based on a terahertz frequency quantum cascade laser. We show that variations on the laser voltage induced by optical feedback to the laser can be resolved with reinjection of powers as low as ~−125 dB of the emitted power. Our measurements demonstrate a noise equivalent power of ~1.4 pW/√Hz, although after accounting for reinjection losses we estimate this corresponds to only ~1 fW/√Hz being coupled to the quantum cascade laser active region. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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