Constricted double-heterojunction diode lasers of positive-index lateral guiding and low-threshold-current design are found to operate cw to 170 °C (ambient temperature) and pulsed to 280 °C. High threshold-current temperature coefficients (T0≳230 °C) and constant differential quantum efficiencies are found up to 100 °C. Above 100 °C the temperature-dependent current-focusing effect responsible for high-T0 behavior appears to saturate. Single-longitudinal-mode cw operation is recorded up to 150 °C. Two effects, a strong temperature dependence of the threshold current density above 180 °C (T′0 = 40–50 °C), and sublinear spontaneous emission above 220 °C, are believed to reflect the same nonradiative Auger recombination process currently proposed to explain InGaAsP laser behavior near room temperature.
No takes yet. Share an insight, caveat, or question.
Botez et al. (1981) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: