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.
Received: 04 October 2006
Revised: 31 January 2007
Accepted manuscript online:
PACS:
42.65.Pc
(Optical bistability, multistability, and switching, including local field effects)
Fund: Project supported by
the National Natural Science Foundation of China (Grant Nos 10174057
and 90201011), and the Foundation for Key Program of Ministry of
Education, China (Grant No 2005-105148).
Cite this article:
Zhang Wei-Li(张伟利), Pan Wei(潘炜), Luo Bin(罗斌), Li Xiao-Feng(李孝峰), Zou Xi-Hua(邹喜华), and Wang Meng-Yao(王梦遥) Polarization switching and synchronization of mutually coupled vertical-cavity surface-emitting semiconductor lasers 2007 Chinese Physics 16 1996
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