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arXiv 1802.01775physics.ins-detphysics.optics
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多腔超稳laser向10-18

Multi-cavity ultra-stable laser towards 10-18

Zhaoyang Tai, Lulu Yan, Yanyan Zhang, Pan Zhang, Xiaofei Zhang, Wenge Guo, Shougang Zhang, Haifeng Jiang

摘要:

在这封信中,我们展示了一种技术,使一个超稳定的激光器参考多腔,对应于较低的热噪声限制,由于较大的等效光束尺寸。多腔由几对反射镜和一个共用的隔离片组成。在这些谐振腔上可以稳定激光频率,并利用合成技术实现激光频率的平均化。与单腔系统相比,合成激光器的相对频率不稳定性可改善1倍于腔数(n)的平方根。此外,我们进行了一个实验,以模拟一个双腔系统。实验结果表明,合成激光器的频率不稳定性改善了1.4倍,而由激光合成过程引入的激光频率不稳定性的分辨力可以忽略不计,受目前使用的信号发生器噪声的限制,可以达到10-18的低水平。这种技术与其它技术相比,可以使超稳激光器的频率不稳定性提高到一个前所未有的水平。

英文摘要:

In this letter, we demonstrate a technique of making an ultrastable laser referenced to a multi-cavity, corresponding to a lower thermal noise limit due to the larger equivalent beam size. The multi-cavity consists of several pairs of mirrors and a common spacer. We can stabilize the laser frequencies on these cavities, and average the laser frequencies with synthesizing technique. In comparison with a single cavity system, relative frequency instability of the synthesized laser can be improved by a factor of the squire root of the cavity number (n). In addition, we perform an experiment to simulate a two-cavity system. Experimental results show that frequency instability of the synthesized laser is improved by a factor of 1.4, and discrimination of the laser frequency instability, introduced by the process of lasers synthesizing, is negligible, and can reach a floor at low level 10-18 limited by noise of currently used signal generators. This technique is comparable with other techniques; thus, it can gain a factor of the squre root of n on the frequency instability of an ultrastable laser to an unprecedented level.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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