Anti-reflective coatings may be used on laser high index gain media to
mitigate reflection. An absentee layer may be used to compliment the
antireflective coating to improve its antireflective performance over a
broader range of wavelengths. The absentee layer comprises a material
having a higher index of refraction than that of the gain media and has a
thickness corresponding to multiple halfwave thicknesses related to the
center wavelength output by the laser.