In this work we describe the spectral purity transfer between a 1156 nm ultrastable laser and a 1542 nm diode laser by means of an Er:fiber multibranch comb. By using both the master laser light at 1156 nm and its second-harmonic at 578 nm, together with the 1542 nm slave laser, we investigate the residual noise between the main comb output, the octave-spanning output, and a wavelength conversion module including non-linear fibers, second-harmonic generation crystal and amplifiers. With an ultimate stability of the system at the level of 5E−17 at 1 s and accuracy of 3E−19, this configuration can sustain spectral transfer at the level required by the contemporary optical clocks with a simple and robust setup.
|Titolo:||Spectral purity transfer with 5 × 10−17 instability at 1 s using a multibranch Er:fiber frequency comb|
|Data di pubblicazione:||2019|
|Digital Object Identifier (DOI):||10.1088/1681-7575/ab2b0f|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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