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《Laser & Infrared》 2011-02
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New measurement method for linewidth enhancement factor based on self-mixing interferometry

YE Hui-ying,WANG Yan-hua,YU Yan-guang(School of Information Engineering,Zhengzhou University,Zhengzhou 450052,China)  
In the situation of the external cavity fluctuation,the algorithm of measuring Linewidth Enhancement Factor(LEF) is designed.It is based on the down-fringle mapping point position near the center of vibration signal.Compared with previous algorithm,the algorithm presented in this paper is free of the limitation of the optical feedback mechanism level,which is proven by both simulation and experiments.The accurate measurement of LEF is of great significance to semiconductor lasers performance research and application.
【Fund】: 国家自然科学基金项目(No.60871031)资助
【CateGory Index】: TN248.4
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