Title :
Free-carrier effect on index change in 1.3 μm quantum-dot lasers
Author :
Hegarty, S.P. ; Corbett, B. ; McInerney, J.G. ; Huyet, G.
Author_Institution :
Phys. Dept., Tyndall Nat. Inst., Cork, Ireland
fDate :
3/31/2005 12:00:00 AM
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.
Keywords :
absorption coefficients; quantum dot lasers; refractive index; 1.3 micron; device length; free-carrier absorption; free-carrier effect; phase-amplitude coupling; quantum-dot lasers; refractive index change;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20050010
