铷钟光谱灯热结构设计

A design of thermal structure of rubidium spectrum lamp

光谱灯作为铷原子频标物理系统的重要组成部分,其结构设计特别是热结构设计不仅关系到光谱灯工作的稳定性和效率,而且还直接影响其自身的工作模式、光谱轮廓和光强稳定性,从而对整机的频率输出性能产生重要影响。针对原有结构的铷光谱灯所存在的灯温高、激励电路稳定性低、激励功率大以及加热效率低下等问题,结合热仿真和实验结果,重新设计了一款优化热结构的光谱灯。相比原有结构光谱灯,其灯温降低10℃,激励功耗降低50%,加热功耗减小0.55 W,且更加稳定可靠,更适合应用于小型铷原子频标。

The rubidium spectrum lamp is one of the key parts of the rubidium frequency standard. The design of the structure of the rubidium spectrum lamp, especially the design of its thermal structure, have direct impacts on the stability and efficiency of the rubidium spectrum lamp, and directly influence the working mode,spectrum line shape and light stability, so as to greatly influence the performance of the rubidium frequency standards. In this article, based on simulation and experiment results we proposed a new lamp with an optimized thermal structure to avoid the disadvantages of an existing model, such as high lamp-temperature, worse stability of exciting circuit, high exciting power, low heating efficiency, etc. Compared with the original lamp, the lamp temperature, the power consumption and heating efficiency decrease by 10℃, 50%, and 0.55 W respectively for this new rubidium spectrum lamp, and it is more stable and reliable, being more suitable for being used in miniature rubidium frequency standards.