Abstract
Emission from a tensile-strained ridge-waveguide InGaAsP-InP laser, which exhibits a transition between TE and TM polarization when the DC injection current exceeds a certain value, was investigated by time- and polarization-resolved measurements. Under excitation with 100 ps current pulses the laser emits pairs of TE and TM pulses of about 50 ps duration. The longitudinal modes of the emission spectrum exhibit different spectral profiles depending on the mode wavelength, which can be explained in terms of the mode competition and asymmetric gain dispersion. The near-field intensity distribution of the laser excited with a 1.4 ns current pulse shows periodic changes of its lateral width associated with 3 GHz relaxation oscillations alternating between TE and TM polarization.
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Schedule a callMore From: Quantum and Semiclassical Optics: Journal of the European Optical Society Part B
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