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Optical Engineering

Polarization dynamics of vertical-cavity surface-emitting lasers with optical feedback
Author(s): Wei Li Zhang; Wei Pan; Bin Luo; Xi Hua Zou; Mengyao Wang
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Paper Abstract

The standard two-mode rate equations are extended to discuss polarization behavior of vertical-cavity surface-emitting lasers (VCSELs) with optical feedback. In the rate equations, a logarithmic gain formula and unit step function are used to simulate the experimental conditions more truly. Our simulation results show that weak polarization-preserving feedback will cause multiple polarization switches (PSs) with increasing bias current; strong feedback can suppress PSs and make the VCSEL work in a single polarized mode. The case is similar when y-polarized feedback is considered. The PS point does not disappear even under strong x-polarized feedback. Bifurcation diagrams show that the interplay of PSs and delayed feedback makes the nonlinear dynamics of the two polarized modes more complex. If the feedback is large enough, both chaotic pulses due to feedback and low-frequency fluctuations due to gain competition emerge in the time traces of the two modes. Polarization modulation is also demonstrated when a quarterwave plate is added to the external cavity, which agrees with the experimental observations.

Paper Details

Date Published: 1 November 2006
PDF: 6 pages
Opt. Eng. 45(11) 114202 doi: 10.1117/1.2390675
Published in: Optical Engineering Volume 45, Issue 11
Show Author Affiliations
Wei Li Zhang, Southwest Jiaotong Univ. (China)
Wei Pan, Southwest Jiaotong Univ. (China)
Bin Luo, Southwest Jiaotong Univ. (China)
Xi Hua Zou, Southwest Jiaotong Univ. (China)
Mengyao Wang, Southwest Jiaotong Univ. (China)

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