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The reactive-ion-etching (RIE) technique utilising a TiO2 mask and Cl2-Ar gas is successfully applied to facet mirror fabrication of 1.5 ?m InGaAsP/InP buried-heterostructure (BH) lasers. Room-temperature CW operation has been achieved with a structure having one etched and one cleaved facet. A threshold current value of 30 mA at 25?C has been achieved for a laser with a 380 ?m cavity length.