摘要
研究了注入电流调制下半导体激光器(LD)干涉特性,建立了光纤准白光干涉模型,并分析了多纵模半导体激光(MLD)调制对光纤干涉信号的影响。在实验中,选用不同的电流波形调制,研究了相应条件下的光纤干涉特性,并找到了最佳的调制参数。实验表明,采用类三角波电流调制可有效减小半导体激光的相干长度,从400 mm减小到40μm,将准白光干涉瞄准的精度提高到1μm。
The interference characteristics of the current injecting laser diode（LD） was researched. The optical fiber quasi-white light interference model was set up,and the semiconductor laser modulation＇s effects on the optical fiber interference signal were analyzed. In the experiments, in order to obtain the best modulation parameter, several multi-mode LD（MLD） modulation methods and optical fiber interference characteristics under corresponding conditions are investigated. It has been proved by experiments that the coherent length of the semiconductor laser is effectively reduced from 400 mm to 40μm by adopting current injecting method, with the result that the collimating accuracy of the quasi-white light is improved up to 1μm.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2005年第9期1089-1092,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(50005014)
