Compact high-spectral purity frequency combs for Strontium quantum clock

Sana Boughdachi; Andreas Brodschelm; Rafał Wilk; Florian Schreck

doi:10.1117/12.3001852

12 March 2024 Compact high-spectral purity frequency combs for Strontium quantum clock

Sana Boughdachi, Andreas Brodschelm, Rafał Wilk, Florian Schreck

Proceedings Volume 12865, Fiber Lasers XXI: Technology and Systems; 128650K (2024) https://doi.org/10.1117/12.3001852
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

Integrated quantum clocks exemplify ultracold-atom-based quantum sensors that rely on lasers as a crucial component. Precise control over the quantum states of ions and atoms used in such devices necessitates lasers with narrow linewidths, high spectral stability, and minimal phase noise. To transfer the absolute spectral characteristics to the cooling and trapping lasers, frequency combs come into play. A reduction of the intrinsic linewidths of frequency combs below a few kHz without need of locking to an optical stabilization cavity would simplify quantum clock experiments significantly. Frequency combs based on mode-locked Er:fiber oscillators are state-of-the-art systems exhibiting several advantages over solid-state lasers like compactness, alignment-free operation and robustness against environmental influences. By employing supercontinuum generation, amplification stages and nonlinear conversion processes, the wavelength range of fiber frequency combs can be extended from 420 to more than 2000 nm. Fiber frequency combs typically have comb lines with an intrinsic optical linewidth in the range of several tens of kilohertz. The broadening of the linewidth is attributed to factors such as pump-induced noise, sensitivity on environmental effects as well as on quantum noise effects. In our recent work we have demonstrated frequency combs exhibiting exceptionally low phase noise resulting in comb linewidths as low as 700 Hz. In this work we employ this technique aiming intrinsically narrow linewidths at wavelengths used in an integrated quantum clock experiment based on Strontium atoms (813 nm, 689 nm).

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Sana Boughdachi, Andreas Brodschelm, Rafał Wilk, and Florian Schreck "Compact high-spectral purity frequency combs for Strontium quantum clock", Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems, 128650K (12 March 2024); https://doi.org/10.1117/12.3001852

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Quantum noise

Frequency combs

Terahertz radiation

Oscillators

Quantum clocks

Strontium

Quantum beats

Show All Keywords

Keywords/Phrases

Search In:

Publication Years