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Photoreflectance (PR) and photocurrent (PC) measurements have been demonstrated in the 1250–1600 nm spectral range using an external‐cavity pressure‐tuned laser diode as the source of monochromatic light. Compared to conventional PR and PC methods using monochromated light from the lamp, it allows to achieve a smaller spot so that micro‐PR and micro‐PC are possible either directly or with fiber coupled...
Threshold current in 808 nm GaAsP/AlGaAs laser diode has been measured as a function of pressure (up to 1.8 GPa) and temperature (from 80 to 300 K). The results have been analyzed in order to separate leakage current from radiative current and to determine the effective barrier for leakage and its pressure dependence. Our data indicates that both X and L minima in the barriers and in the claddings...
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