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Phase stability transfer across the optical domain using a commercial optical frequency comb system (1905.05065v1)

Published 13 May 2019 in physics.atom-ph

Abstract: We report the frequency noise suppression of a 674nm diode laser by phase-locking it to a 1560nm cavity-stabilized laser, using a commercial optical frequency comb. By phase-locking the frequency comb to the narrow reference at telecom wavelength we were able to phase-coherently distribute the reference stability across the optical spectrum. Subsequently, we used one of the comb teeth as an optical reference for a 674nm external cavity diode laser. We demonstrated the locked 674nm laser frequency stability by comparing it to an independent cavity-stabilized laser of the same wavelength and by performing spectroscopic measurements on a dipole-forbidden narrow optical transition in a single ${88}$Sr$+$ ion. These measurements indicated a fast laser linewidth of 19Hz and 16Hz, respectively.

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