Institute of Electrical and Electronics Engineers, IEEE Journal of Selected Topics in Quantum Electronics, 5(10), p. 998-1005, 2004
DOI: 10.1109/jstqe.2004.835325
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We present theory and measurements on a vertical-cavity surface-emitting laser (VCSEL) biased close to its solitary threshold and subject to polarization selective external optical feedback. The system shows low-frequency fluctuations (LFF) in the selected polarization mode (PM). Below solitary laser threshold, the orthogonal PM remains silent, while it only responds after a dropout event in the main mode above threshold. Our calculations show good agreement with the measurements and identify a type of synchronization between the low-frequency dynamics of the two PMs.