Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep24969
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Funding
- National Natural Science Foundation of China [11127405, 11334002, 11374102]
- Shanghai Rising-Star Program [15QA1401900]
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Narrow-linewidth ultrastable lasers at 1.5 mu m are essential in many applications such as coherent transfer of light through fiber and precision spectroscopy. Those applications all rely on the ultimate performance of the lasers. Here we demonstrate two ultrastable lasers at 1557 nm with a most probable linewidth of 0.26 Hz by independently frequency-stabilizing to the resonance of 10-cm-long ultrastable Fabry-Perot cavities at room temperature. The fractional frequency instability of each laser system is nearly 8 x 10(-16) at 1-30 s averaging time, approaching the thermal noise limit of the reference cavities. A remarkable frequency instability of 1 x 10(-15) is achieved on the long time scale of 100-4000 s.
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