Thermal-resistance models for proton-isolated double-heterostructure lasers

Calculations of the thermal resistances of stripe-geometry double-heterostructure lasers are dependent on assumptions made concerning the positions of heat sources within the laser structures. The effect on thermal resistance of heat sources located at various levels in the multilayer structure are considered here. The calculations indicate that thermal resistances of proton-isolated structures can be approximately halved when energy is radiatively transferred from the device active region rather than when all heat is generated within the device active region. This should be taken into consideration when the experimental effectiveness of laser-dice-bonding technology is being evaluated.