Phase stability transfer across the optical domain using a commercial optical frequency comb system

TL;DR

This paper demonstrates transferring phase stability from a telecom-wavelength laser to a visible 674nm laser using a commercial optical frequency comb, achieving high frequency stability and narrow linewidths.

Contribution

It introduces a method for phase stability transfer across optical domains using a commercial frequency comb, enabling stable and narrow-linewidth lasers at different wavelengths.

Findings

Achieved 19Hz and 16Hz laser linewidths at 674nm.

Successfully transferred phase stability from telecom to visible wavelengths.

Validated stability transfer through spectroscopy on Sr+ ion.

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.