Multi-threshold second-order phase transition in laser

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（35）
• 页码范围: 3812-3816
• 页数: 5页
• 分类号: TN241|O414.13
• 语种: 中文

摘要

We present a theory of the multi-threshold second-order phase transition,and experimentally demonstrate the multi-threshold secondorder phase transition phenomenon.With carefully selected parameters,in an external cavity diode laser system,we observe secondorder phase transition with multiple(three or four) thresholds in the measured power-current-temperature three dimensional phase diagram.Such controlled death and revival of second-order phase transition sheds new insight into the nature of ubiquitous secondorder phase transition.Our theory and experiment show that the single threshold second-order phase transition is only a special case of the more general multi-threshold second-order phase transition,which is an even richer phenomenon.