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The mode splitting induced by electro-optic birefringence in a P–I–N InGaAs/GaAs/AlGaAs vertical-cavity surfaceemitting laser(VCSEL)has been studied by polarized electroluminescence(EL)at room temperature.The polarized EL spectra with E[110]and E[1ˉ10]directions,are extracted for different injected currents.The mode splitting of the two orthogonal polarized modes for a VCSEL device is determined,and its value increases linearly with the increasing injected current due to electro-optic birefringence.This article demonstrates that the polarized EL is a powerful tool to study the mode splitting and polarization anisotropy of a VCSEL device.
The mode splitting induced by electro-optic birefringence in a P-I-N InGaAs / GaAs / AlGaAs vertical-cavity surfaceemitting laser (VCSEL) has been studied by polarized electroluminescence ] and E [1’10] directions, are extracted for different injection currents. The mode splitting of the two orthogonal polarized modes for a VCSEL device is determined, and its value increases linearly with the increasing injected current due to electro-optic birefringence. This article demonstrates that the polarized EL is a powerful tool to study the mode splitting and polarization anisotropy of a VCSEL device.