Abstract
A dual-wavelength emission source is realized by asymmetrically pumping a two-section quantum-dot distributed feedback laser. It is found that under asymmetric bias conditions, the powers between the ground-state and excited-state modes of the two-section device can be equalized, which is mainly attributed to the unique carrier dynamics of the quantum-dot gain medium. As a result, a two-color emission with an 8-THz frequency difference is realized that has potential as a compact THz source. It is also shown that the combination of significant inhomogeneous broadening and excited-state coupled mode operation allows the manipulation of the quantum-dot states through external optical stabilization.
| Original language | English |
|---|---|
| Pages (from-to) | 27028-27035 |
| Number of pages | 8 |
| Journal | Optics Express |
| Volume | 18 |
| Issue number | 26 |
| DOIs | |
| Publication status | Published - 20 Dec 2010 |
| Externally published | Yes |