CAJ | 학술논문

对固体激光器的光谱纵模特性与复相干度的关系进行了理论分析,推导出了在任意纵模数下的光程差与复相干度的关系式.通过比较窄谱宽激光器与谱宽较宽的测量用普通固体激光器在不同纵模数下的复相干度特性,发现固体激光器谱宽较宽,复相干度衰减较快,不同纵模数下的衰减速度和周期不同,纵模数越多复相干度震荡衰减越快,不会出现周期性的高相干区域.根据理论分析搭建了一台用于干涉测量的短相干多纵模固体激光器,并对其光谱纵模特性和相干长度进行了测量,实验结果与计算结果一致.
대고체격광기적광보종모특성여복상간도적관계진행료이론분석,추도출료재임의종모수하적광정차여복상간도적관계식.통과비교착보관격광기여보관교관적측량용보통고체격광기재불동종모수하적복상간도특성,발현고체격광기보관교관,복상간도쇠감교쾌,불동종모수하적쇠감속도화주기불동,종모수월다복상간도진탕쇠감월쾌,불회출현주기성적고상간구역.근거이론분석탑건료일태용우간섭측량적단상간다종모고체격광기,병대기광보종모특성화상간장도진행료측량,실험결과여계산결과일치.
spectral longitudinal mode character of short coherence solid laser is analyzed with complex coherence degree. The relation between optical path difference and complex coherence degree with multi-longitudinal modes is deduced. Comparing narrow line width laser and normal wider line solid laser in simulation, the complex coherence degree of solid laser decreases more quickly with wider line width and more longitudinal modes. An experimental short coherence solid laser for interferometry is built. The coherence length is measured. The result is in agreement with the foregoing analysis.