此次，研究团队突破非线性晶体主流路线，创新性提出金属蒸气四波混频新方案，实现148纳米连续波 输出，并将线宽降低近6个数量级，为真空紫外波段超稳激光技术奠定基础，抢先完成关键技术突破， 领先国际同类专项研究。 记者12日从清华大学获悉，该校副教授、北京量子信息科学研究院兼聘研究员丁世谦团队攻克了核光钟 研制的"最后一个核心瓶颈"——他们在连续波真空紫外光源方面取得重大突破，成功研制出148纳米连 续波超窄线宽激光光源，首次将超稳激光技术拓展至真空紫外波段。这一突破补齐了核光钟的关键技术 短板，为精密测量领域发展开辟新路径，彰显了我国在量子科技与基础研究领域的领先实力。相关成果 当日发表于国际期刊《自然》。 该成果应用价值显著，除支撑核光钟研究外，还可作为通用平台服务原子光钟、量子信息、凝聚态谱学 等前沿领域，支撑自主导航、深空探测、高精度地质与引力探测等应用，并有望实现半导体真空紫外计 量与高端测试装备自主可控。 时间计量是基础科学的核心领域。当前，原子光钟虽精度极高，但依赖原子外层电子跃迁，易受电磁干 扰，仅能在实验室环境中运行。而核光钟通过真空紫外激光诱导原子核跃迁，具备更高精度与强抗干扰 能力，且可实现 ...

Core Viewpoint - The article discusses the significant advancements in nuclear optical clock technology, particularly the development of a continuous-wave narrow-linewidth vacuum ultraviolet laser source, which addresses a critical bottleneck in the field [2][3][4]. Group 1: Technological Breakthrough - The Tsinghua University team successfully developed a 148 nm continuous-wave ultra-narrow linewidth laser source, overcoming the last core bottleneck in nuclear optical clock research [3][4]. - This laser source outputs power exceeding 100 nW and has a linewidth significantly lower than 100 Hz, with continuous tunability in the 140 to 175 nm range, which is crucial for the development of thorium-229 nuclear optical clocks [3][6]. Group 2: Strategic Importance - Nuclear optical clocks, utilizing nuclear transitions instead of electronic transitions, are expected to provide higher precision and better environmental disturbance resistance, making them a strategic frontier in quantum precision measurement [2][4]. - The advancements in laser technology not only facilitate the development of nuclear optical clocks but also support various cutting-edge scientific applications, including quantum information experiments and high-resolution spectroscopy [7]. Group 3: Future Implications - The new laser source platform is anticipated to enhance the resilience of key segments in the semiconductor industry by supporting vacuum ultraviolet metrology and chip testing [7]. - The research findings lay the groundwork for further advancements in coherent vacuum ultraviolet light sources, potentially leading to higher performance metrics in various applications [6][7].