Modeling and Analysis of Coherence for Semiconductor Solid-state Lasers
To provide a short coherence length laser source for the fiber point diffraction interferometer, the theoretical modeling, numerical analysis and experimental validation of a semiconductor solidstate laser source is implemented in this paper. At first, Mutual Coherence Function is introduced to describe the coherence of optical field and the theoretical model of a multi-longitudinal mode laser coherence is built in accordance with the spectral characteristics of the laser. Through numerical analysis, the factors of coherence are discussed such as longitudinal-mode number, spectral half width and resonant cavity length. The important conclusions are achieved. Multi-Longitudinal Mode laser source has periodic coherence degree no matter how many longitudinal modes it contains, and the period of laser coherence degree is always double resonant cavity length. The method for designing short coherence length laser is put forward based on the conclusions and its coherence is measured in experiment. The result shows that the coherence length reaches 5 cm and meets the need of the interferometer.
Coherence multi-longitudinal mode laser source interferometer
Nie Liang Dang Weiqiang Jiang Xu
School of Opto-electronics Engineering Xian Technological University Xian, 710032, China Xian Institute of Applied Optics Xian, 710065, China
国际会议
深圳
英文
93-97
2010-11-20（万方平台首次上网日期，不代表论文的发表时间）