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用于氢原子1S-2S光谱研究的超窄线宽243nm半导体激光

Ultra-narrow linewidth 243nm diode laser for precision hydrogen spectroscopy

  • 摘要: 近年来,随着激光稳频技术的发展,人们可以把972nm的外腔半导体激光器产生的激光进行放大和四倍频,并将它锁定到超稳定的光学法布里-珀罗腔上,从而可以获得Hz量级超窄线宽的243nm激光,使其成为研究氢原子1S-2S双光子跃迁的有力工具.文章主要介绍了超稳腔、四倍频243nm半导体激光器的研究进展及在氢原子1S-2S双光子跃迁精密光谱研究中的应用.

     

    Abstract: With the development of frequency stabilization technology in recent years, the linewidth of the 243nm laser based on a frequency-quadrupled external cavity 972nm diode laser has been compressed to sub-Hz level by locking to an ultrastable Fabry-Perot cavity. This has provided a new tool in high-resolution spectroscopy for studying the 1S-2S transition in atomic hydrogen. Recent progress in the development of an ultrastable 243nm laser and its applications in precision hydrogen spectroscopy will be reviewed, as well as some key issues of Fabry-Perot cavity manufacture.

     

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