External optical feedback in vertical-cavity surface-emitting laser (VCSEL) is found to influence its output intensity.We studied the effect of the amount of total output polarisation feedback and polarisation-selective feedback on the output intensities of a VCSEL for a low-resolution sampling and for long temporal duration. A 40 μs resolution time-series correlation analysis is performed for different feedback conditions and the characteristicdynamics is investigated.We found a correlated fluctuation in VCSEL output for a moderate amount of total feedbackand polarised feedback. The period of such fluctuations is found to be reduced from total feedback to the polarised feedback of the system.
Volume 96, 2022
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