利用原子的塞曼光谱对半导体激光器进行稳频  

Frequency Stabilization of Diode Laser Using Zeeman Spectra

作　　者：江开军[1] 王谨[1] 李可[1] 何明[1] 涂鲜花[1] 詹明生[1] 

机构地区：[1]中国科学院武汉物理与数学研究所

出　　处：《光谱学与光谱分析》2004年第6期659-662,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (1 0 1 0 4 0 1 8;1 0 0 740 72 )资助项目

摘　　要：中性原子的超精细能级在磁场中产生塞曼分裂 ,另外 ,左旋和右旋圆偏振光激发下原子的跃迁选择定则不同 ,因此 ,原子在超精细塞曼能级间的吸收谱峰相对无磁场条件下的吸收谱峰有一定的移动。利用这一点 ,验证了一种简单、灵活的方法对半导体激光器进行稳频 ,使激光器的线宽稳到小于 1MHz。通过对实验结果的分析 ,发现由左旋和右旋圆偏振光激发引起的原子吸收谱峰移动之和与饱和吸收峰半高宽相等时 。Zeeman split takes place for the hyperfine level structure of neutral atoms where magnetic field exists. In addition, being excited by right circularly polarized light and left circularly polarized light, atoms obey different transition rules. So, the absorption peak between the hyperfine Zeeman level shifts with respect to the absorption peak without magnetic field. Accordingly, the authors demonstrated a kind of simple and flexible method to stabilize the frequency of diode laser. The linewidth of diode laser was reduced to less than 1 MHz using this method. Through analyzing the experiment results, the authors found that when the sum of both shifts of the hyperfine level of atoms excited by right circularly polarized light and left circularly polarized light was equal to the FWHM(Full Width at Half Maximum) of the saturated absorption peak, the laser frequency was stabilized best.

关 键 词：半导体激光器 超精细能级 稳频 中性原子 塞曼光谱 色散线型 

分 类 号：TN248.4[电子电信—物理电子学] O562.3[理学—原子与分子物理]