The self-aligned processing technology is adopted to make seperated absorbing ridge waveguide （RWG） light emitting diode

and a λ/4 dielectric film is coated on the front surface to increase spontaneous emitting composition in the light output and fibre coupling efficiency. High power RWG LED made by these technologies has relative small lightbeam divergence angle and more than 20μW light output power

maximum 50μW

are got from the coupled standard single-mode fibre under 25C and 100mA DC drive current. 70 devices are taken to carry out the h fetest under 50

80

120℃ and 150mA CW drive current

almost 248 500 device hours are tested. According to the life test results

we can get 1. 2×106 h of lifetime under the condition of 25C ambient temperature and 150mA drive current

and the degenerate activated energy is Ea=0. 48eV.