Wei Li ZHANG^*, Wei PAN, Bin LUO, Xi Hua ZOU and Meng Yao WANG

School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

(Received June 21, 2006; Accepted October 13, 2006)

For vertical-cavity surface-emitting lasers (VCSELs) with polarization-rotated feedback, there exist several synchronization types such as synchronizations between total powers and synchronizations between separate polarization modes. Based on the two-mode rate equations, we study and compare numerically the performances of different synchronization types. Our results show that three synchronization types exhibit good performances when their synchronization conditions are satisfied. They are the complete synchronization between total powers, complete synchronization between x-polarized modes, and generalized synchronization between x-polarized and y-polarized modes. The former two types are sensitive to the injection rate and spontaneous emission, while the third type is contrary. Synchronization type with the best performance may switch from one to another, with changing of injection rate and spontaneous emission factor.

Key words: laser technology, vertical-cavity surface-emitting lasers, VCSEL, chaos synchronization, polarization-rotated feedback, chaos

^*E-mail address: daduoer@126.com