Polarization switching and synchronization of mutually coupled vertical-cavity surface-emitting semiconductor lasers |
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Authors: | Zhang Wei-Li Pan Wei Luo Bin Li Xiao-Feng Zou Xi-Hua and Wang Meng-Yao |
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Institution: | School of Information Science & Technology, Southwest Jiaotong University, Chengdu 610031, China |
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Abstract: | Polarization switching (PS) dynamics and synchronization
performances of two mutually coupled vertical-cavity
surface-emitting lasers (VCSELs) are studied theoretically in
this paper. A group of dimensionless rate equations is derived
to describe our model. While analysing the PS characteristics,
we focus on the effects of coupling rate and frequency detuning
regarding different mutual injection types. The results indicate
that the x-mode injection defers the occurrence of PS, while
the y-mode injection leads the PS to occur at a lower current.
Strong enough polarization-selective injection can suppress the
PS. Moreover, if frequency detuning is considered, the effects
of polarization-selective mutual injection will be weakened. To
evaluate the synchronization performance, the correlation
coefficients and output dynamics of VCSELs with both pure mode
and mixed mode polarizations are given. It is found that
performance of complete synchronization is sensitive to the
frequency mismatch but it is little affected by mixed mode
polarizations, which is opposite to the case of
injection-locking synchronization. |
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Keywords: | vertical-cavity surface-emitting
semiconductor laser polarization mutual injection synchronization |
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