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Millihertz-linewidth lasers

A sharper laser

A new approach to lasers that promises optical emission with a spectral linewidth of just 1 mHz could lead to even more accurate and stable atomic clocks.

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Sterr, U., Lisdat, C. A sharper laser. Nature Phys 5, 382–383 (2009). https://doi.org/10.1038/nphys1296

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