清华团队首创148纳米超窄线宽紫外激光,补齐核时钟最后一块核心技术拼图#自主量子科技 Tsinghua team pioneers 148nm ultra-narrow linewidth ultraviolet laser, completing the final core technical puzzle of nuclear clocks. #IndependentQuantumTech 幸福小筑(💯互Fo❗️❗️) @mengwei73526359 · 2026-06-29