Patent ID: 6396864
Filing Date: 2002-05-28
Classification: H01L,H01S

Abstract:
A light emitting device comprising:a plurality of deposited layers with faces formed in plane transverse to the longitudinal extent of said layers forming longitudinal ends of the device, the device being fabricated from a material capable of producing light; said light being emitted as a beam from at least one of said facets and generating heat thereat; and a singe layer coating formed on at least one of said facets for transferring heat therefrom to increase the useful life of the device, said coating having a thickness near N&lgr;/(4n), where N is an odd integer greater than 1, so as to provide a facet reflectivity level substantially the same as a &lgr;/(4n) thick layer but with improved heat transport quality, where &lgr; is the oscillation wavelength of the device and n is the refractive index of the coating, and having a thermal conductivity higher than the thermal conductivity of the said device material.