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设计并实现了一种通过原子对激光的吸收光谱研究被动型相干布居囚禁(CPT)原子钟所使用的垂直腔面发射激光器(VCSEL)特性的实验方法。通过切换输入VCSEL的微波功率,实验记录原子对单色和调频多色激光的吸收谱,借助光谱分析研究了VCSEL激光管自身温度变化速度、微波功率变化造成VCSEL的温度变化及VCSEL输出波长随温度的变化等特性,以及通过所实现的光谱直接测量所用VCSEL制备CPT态的效率。该方法为CPT原子钟所用的VCSEL提供了一个有用的测试、研究平台,对于原子钟的研制和VCSEL研究具有实际价值。
An experimental method for studying the characteristics of vertical cavity surface emitting lasers (VCSELs) used in passive coherent population captivity (CPT) atomic clocks was designed and realized by atomic absorption spectroscopy. By switching the input VCSEL microwave power, the atomic absorption spectra of monochromatic and chirped multi-color laser were experimentally recorded. The self-temperature variation speed of VCSEL laser tube was studied by means of spectral analysis. The variation of VCSEL temperature and the output wavelength of VCSEL with temperature And so on, as well as directly measuring the efficiency of preparing the CPT state of the VCSEL used by the achieved spectrum. The method provides a useful test and research platform for the VCSEL used in the CPT atomic clock and has practical value for the development of atomic clocks and VCSEL research.