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We present a frequency chain which enables to transfer coherently the stability and the accuracy of an ultrastable laser emitting at 1.54 μm to the mid-infrared region. It includes an optical frequency comb and an ultrastable 1.54 μm frequency signal, referenced to primary standards and transferred from LNE-SYRTE to LPL through an optical link. This system gives us the ability to transfer frequency...
Ultra-high-resolution spectroscopy enables to test modern theories of fundamental physics with molecules as for instance the non conservation of parity [1] or the stability of the electron-to-proton mass ratio [2]. However many of these tests rely on the availability of ultra-stable and accurate laser sources emitting in the mid-infrared (MIR) where molecules exhibit rovibrational transitions. It...
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