Spectrally narrow, long-term stable optical frequency reference based on a Eu3+:Y2SiO5 crystal at cryogenic temperature |
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Authors: | Chen Qun-Feng Troshyn Andrei Ernsting Ingo Kayser Steffen Vasilyev Sergey Nevsky Alexander Schiller Stephan |
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Affiliation: | Institut für Experimentalphysik, Heinrich-Heine-Universit?t Düsseldorf, 40225 Düsseldorf, Germany. qun-feng.chen@uni-duesseldorf.de |
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Abstract: | Using an ultrastable continuous-wave laser at 580 nm we performed spectral hole burning of Eu(3+):Y(2)SiO(5) at a very high spectral resolution. The essential parameters determining the usefulness as a macroscopic frequency reference, linewidth, temperature sensitivity, and long-term stability, were characterized using a H-maser stabilized frequency comb. Spectral holes with a linewidth as low as 6 kHz were observed and the upper limit of the drift of the hole frequency was determined to be 5±3 mHz/s. We discuss the necessary requirements for achieving ultrahigh stability in laser frequency stabilization to these spectral holes. |
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