High power continuous wave output from diode lasers using low loss, low con
finement, asymmetric structures is demonstrated. An asymmetric structure wi
th an optical trap layer was grown by metal organic vapour phase epitaxy. G
ain guided 50 mu m wide stripe 1-3 mm long diode lasers were studied. 1.8W
of continuous wave optical power per uncoated facet was obtained at an inje
ction current of 4.7A (36mW/mu m). The threshold current density is 270-400
A/cm(2).