Diode laser with 1 Hz linewidth |
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| Authors: | Stoehr H Mensing F Helmcke J Sterr U |
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| Affiliation: | Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany. |
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| Abstract: | We report an ultranarrow-linewidth laser spectrometer at 657 nm, consisting of a diode laser locked in a single stage to a stable high-finesse reference cavity. The system is characterized by comparison with a second independent system. From beat frequency measurements a linewidth below 1.5 Hz (FWHM) and a fractional instability of less than 2 x 10(-15) for 1 s of averaging time are observed. |
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