Tc. Wu et al., INFLUENCE OF SEPARATE-CONFINEMENT LAYER BAND-STRUCTURE ON THE TRANSPORT-LIMITED MODULATION BANDWIDTH IN QUANTUM-WELL LASERS, Applied physics letters, 63(4), 1993, pp. 441-443
We analyze the influence of band-structure design of the SCH region on
the transport-limited modulation bandwidth in quantum well (QW) laser
s. By properly grading the SCH region, limitations due to physical-spa
ce transport can largely be removed. Limitations due to intrinsic quan
tum capture (state-space transport) then becomes the dominant one for
GRINSCH QW lasers, though this, too, can be alleviated (but only compl
etely removed) by proper band-structure design.