Abstract
InAsSb/InAsSbP double heterostructures diode lasers for the spectral region 3.3 µm grown by liquid phase epitaxy have been investigated. Emission spectra, far-field patterns and wavelength tuning have been studied over a wide current range from threshold value Ith up to 3Ith at the temperature of liquid nitrogen. Current-controlled wavelength tuning has been obtained both towards shorter wavelengths (to 4.56 cm-1) and towards longer wavelengths (up to 0.9 cm-1) at a temperature T = 77 K, at lasing generation that maintains single mode. Comparison of the emission properties of lasers driven by different types of current (short pulse current, sawtooth pulse current and quasi-CW regime) showed the same quantum-mechanical nature of current tuning. A theoretical model of this nonlinear optical phenomenon is proposed. The estimated times of current tuning, defined mainly by the photon lifetime in the cavity, are about 10-9–10-12 s.
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