title: Theoretical study on polarization dynamics of VCSELs with negative optoelectronic feedback.
abstract: We investigate theoretically the polarization dynamics of vertical-cavity surface-emitting lasers (VCSELs) subjected to negative optoelectronic feedback. As we vary the feedback delay and strength, the VCSEL exhibits interesting nonlinear dynamics in the two-linear polarized directions. The output instability and negative current modulation induced by delayed feedback can also cause polarization switching (PS) to happen. In addition, we investigate the case when the free-running VCSEL emits in the modulated-elliptical state and find that the laser experiences in succession the elliptical polarization, the x-mode polarization, and the mixed-mode polarization states with an increasing feedback strength.
authors.affiliation: School of Information Science and Technology, Southwest Jiaotong University, Cheng'du, 610031 Sichuan, China. daduoer@126.com
authors.forename: Wei Li
authors.initials: WL
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Pan
authors.forename: Bin
authors.initials: B
authors.lastname: Luo
authors.forename: Xiao Feng
authors.initials: XF
authors.lastname: Li
authors.forename: Xi Hua
authors.initials: XH
authors.lastname: Zuo
authors.forename: Meng Yao
authors.initials: MY
authors.lastname: Wang