What is it about?
This study presents the results of an experimental investigation of the polarization switching (PS) of vertical-cavity surface-emitting lasers (VCSELs) using the so-called polarization-rotated optical feedback mechanism. In particular, the experiments is performed by changing the laser driving current, optical feedback (OF) level, modulation signal parameters, such as frequency, modulation-depth in order to assess their influences on the PS of VCSEL.
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Why is it important?
We show that a smaller polarization angle θp is required to realize PS with increasing the level of OF. Moreover, for a fixed OF level and increased bias current a smaller θp is required to ensure PS. However, for a fixed OF and variable modulation parameters, both the frequency and modulation-depth lead to the elimination of PS over the entire range of measurement.
Perspectives
In this paper, we investigate the PS properties of VCSEL by changing the OF level, varying the polarization angle by means of applying the modulation signal, and varying the bias current. We show PS when increasing the OF level, which can be entirely eliminated by modulating the laser source in presence of OF.
Assist Prof. Salam Nazhan AL Zaidi
University of Diyala
Read the Original
This page is a summary of: Investigation of polarization switching of VCSEL subject to intensity modulated and optical feedback, Optics & Laser Technology, December 2015, Elsevier,
DOI: 10.1016/j.optlastec.2015.07.008.
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