Journal
OPTICS LETTERS
Volume 31, Issue 6, Pages 736-738Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.31.000736
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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. (c) 2006 Optical Society of America.
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