Fm. Di Sopra et al., Continuous-wave operation of phase-coupled vertical-cavity surface-emitting laser arrays, APPL PHYS L, 77(15), 2000, pp. 2283-2285
Coupled arrays of vertical-cavity surface-emitting lasers were realized by
patterning the reflectivity of the top-distributed Bragg reflector using a
phase-matching layer and a metal grid. For improved current injection and b
etter heat dissipation the devices were selectively oxidized. Continuous-wa
ve room-temperature operation of these arrays has been achieved at 960 nm.
Near- and far-field measurements confirm the phase-coupling in a typical ou
t-of-phase mode pattern. Analysis of the differential efficiency reveals a
strong decrease when the number of lasing pixels and hence the mesa size is
increased. (C) 2000 American Institute of Physics. [S0003-6951(00)02741-8]
.