Abstract
The first optical clock (OC) /1, 2/ comprised a reference frequency stable He-Ne/CH4 laser at 3.39 μm stabilized to the optical resonance on the F (2)2 methane line with width of about 30 kHz (magnetic hyperfine structure (MHS) was not resolved) and a rather complicated system of division of the optical frequency to the frequencies of the radio-frequency range. The latter consisted of the chain of oscillators successively synchronized to the stable oscillations of the reference laser.
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© 1989 Springer-Verlag Berlin, Heidelberg
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Bagayev, S.N., Chebotayev, V.P., Klementyev, V.M., Timchenko, B.A., Zakharyash, V.F. (1989). Direct Comparison of the Characteristics of Optical and Hydrogen Frequency Standards. In: De Marchi, A. (eds) Frequency Standards and Metrology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74501-0_35
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DOI: https://doi.org/10.1007/978-3-642-74501-0_35
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