Abstract
Below threshold measurements of the carrier induced refractive index change in 1.3 μm quantum-dot lasers at resonance and also below bandgap were carried out. It is demonstrated that free-carrier absorption contributes approximately half the total index change, and that its relative contribution is a function of device length. This result gives a lower bound to phase-amplitude coupling in quantum-dot lasers.
| Original language | English |
|---|---|
| Pages (from-to) | 416-418 |
| Number of pages | 3 |
| Journal | Electronics Letters |
| Volume | 41 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 31 Mar 2005 |