期刊
OPTICS LETTERS
卷 44, 期 3, 页码 594-597出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.44.000594
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- European Space Agency (ESA) [4000116340/16/NL/BJ]
Optical clocks based on strontium (Sr) atoms and ions are currently used to provide precise standards for measuring time. These devices require several narrow-band visible laser sources at specific wavelengths to operate. We report on the diode-pumped continuous-wave laser operation at 674, 688, 689, 698, and 707 nm of a single crystal of Pr3+ :LiGdF4 (Pr:GLF). To the best of our knowledge, Pr:GLF is the only active medium suitable for solid-state laser operation at all the wavelengths of interest for Sr-based clocks in the deep-red region. We also investigated the spectral tunability of this source, achieving an uninterrupted tuning range of 17 nm, between 697 and 714 nm. (C) 2019 Optical Society of America
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