Title :
High peak power (2.2 W) superlattice quantum cascade laser
Author :
Scamarcio, G. ; Troccoli, M. ; Capasso, F. ; Hutchinson, A.L. ; Sivco, D.L. ; Cho, A.Y.
Author_Institution :
Dipartimento Interateneo di Fisica, Univ. e Politecnico di Bari, Italy
fDate :
3/1/2001 12:00:00 AM
Abstract :
The improved optical power performance of superlattice quantum cascade lasers with a novel injector design allowing the tunnelling of electrons into high energy states of the excited miniband is reported. At 8.4 μm and temperatures ⩽120 K, peak powers ⩽2 W per facet are measured, corresponding to a record power of 88 mW/stage. A slope efficiency of 160 mW/A over a current range six times larger than the laser threshold is observed
Keywords :
quantum well lasers; semiconductor superlattices; tunnelling; 120 K; 2.2 W; 8.4 micron; electron tunnelling; injector design; miniband states; optical power; slope efficiency; superlattice quantum cascade laser;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010221
