Described in this letter is a new dielectric reflector designed for injection laser facets which consists of alternating quarter‐wavelength layers of Al2O3and Si. The reflectivity for six layers can be made ≳0.98 over a wavelength range from ∼0.7 to ≳2 &mgr;m. By choosing the appropriate number of quarter‐wavelength layers and the final layer thickness the reflectivity can be varied between 0.01 and 0.98. Finally, both Si and Al2O3are impervious to the chemical cleaning and wetting agents and solders used during the mounting of (AlGa)As cw injection lasers.