Mr. Jiyun Yang Profile

Jiyun Yang

at China Mobile Group Design Institute Co Ltd

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Proceedings Article | 2 December 2020 Paper

Study of two-mode coexistence in 1550-nm vertical-cavity surface-emitting lasers subject to variable polarization optical feedback

Xue-Li Mu, Chen-Xu Li, Ying-Ni Duan, Ji-Yun Yang, Jian-Jun Chen

Proceedings Volume 11717, 117170M (2020) https://doi.org/10.1117/12.2585153

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We experimentally investigated the two-mode coexistence phenomenon in a 1550-nm Vertical-Cavity Surface-Emitting Laser (1550-nm VCSEL) subject to variable polarization optical feedback (VPOF). First, for the fixed feedback strength, through appropriately adjusting the polarization angel of the optical feedback and bias current, the two-mode coexistence including parallel linear polarized mode and vertical linear polarized mode can be found when the bias current is set about 6.50 mA. Meanwhile, a mapping of polarization mode suppression ratio (PMSR) between two orthogonal linear polarization modes is portrayed in the parameter space of the bias current and polarization angel of optical feedback. Second, for a given bias current, with the increase of feedback strength, the two-mode coexistence region is widely expanded for continually varied polarization angel of optical feedback. At the same time, a mapping of PMSR is also presented in the parameter space of feedback strength and polarization angel. It can be seen that reasonable feedback strength and polarization angle are more conducive to expand the two-mode coexistence parameter region.

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