The effects of unpredictability degree on the chaos synchronization properties of vertical-cavity surface-emitting lasers with variable-polarization optical feedback are investigated numerically. For variable-polarization optical injection, only low-unpredictability chaos can be well synchronized, while high-unpredictability chaos cannot be synchronized even with large injection strength. On the other hand, for the polarization-preserved optical injection, the synchronization quality is hardly affected by the unpredictability degree, and high-quality synchronization can be achieved for both low- and high-unpredictability chaos due to injection locking.
© 2011 Optical Society of America
Lasers and Laser Optics
Original Manuscript: June 7, 2011
Revised Manuscript: July 14, 2011
Manuscript Accepted: August 15, 2011
Published: September 1, 2011
Shuiying Xiang, Wei Pan, Lianshan Yan, Bin Luo, Xihua Zou, Ning Jiang, and Lei Yang, "Impact of unpredictability on chaos synchronization of vertical-cavity surface-emitting lasers with variable-polarization optical feedback," Opt. Lett. 36, 3497-3499 (2011)