A compact and robust cooling laser system for an optical strontium lattice clock

authored by: Roman Schwarz, Sören Dörscher, Ali Al-Masoudi, Stefan Vogt, Ye Li, Christian Lisdat
Abstract: We present a simple and robust laser system for two-color, narrow-line cooling on the ⁸⁷ Sr (5s ² ) ¹ S ₀ → (5s5p) ³ P ₁ transition. Two hyperfine lines of this transition are addressed simultaneously with light from a single laser source, using sidebands created by an electro-optical phase modulator. A tapered amplifier system provides laser powers up to 90 mW. We show that amplification does not affect the phase modulation of the laser. This compact and robust laser system offers excellent reliability. Therefore, it is especially well suited for transportable and spaceborne optical clocks. The design offers the potential to be miniaturized into a fully integrated package.
External Organisation(s): National Metrology Institute of Germany (PTB)
Type: Article
Journal: Review of scientific instruments
Volume: 90
ISSN: 0034-6748
Publication date: 25.02.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Instrumentation
Electronic version(s): https://doi.org/10.1063/1.5063552 (Access: Closed)

BibTeX

@article{d85591152c3c4345a6db4b1d6cf5b241,
title = "A compact and robust cooling laser system for an optical strontium lattice clock",
abstract = " We present a simple and robust laser system for two-color, narrow-line cooling on the 87 Sr (5s 2 ) 1 S 0 → (5s5p) 3 P 1 transition. Two hyperfine lines of this transition are addressed simultaneously with light from a single laser source, using sidebands created by an electro-optical phase modulator. A tapered amplifier system provides laser powers up to 90 mW. We show that amplification does not affect the phase modulation of the laser. This compact and robust laser system offers excellent reliability. Therefore, it is especially well suited for transportable and spaceborne optical clocks. The design offers the potential to be miniaturized into a fully integrated package. ",
author = "Roman Schwarz and S{\"o}ren D{\"o}rscher and Ali Al-Masoudi and Stefan Vogt and Ye Li and Christian Lisdat",
note = "Funding information: This work was performed within the framework of the ESA funded project I-SOC (Project No. 4000119716) and the Centre of Quantum Engineering and Space-Time Research (QUEST). Funding from the German Research Foundation DFG within collaborative research center CRC 1227 (DQ-mat, project B02) and research training group RTG 1729 is acknowledged, as well.",
year = "2019",
month = feb,
day = "25",
doi = "10.1063/1.5063552",
language = "English",
volume = "90",
journal = "Review of scientific instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "2",
}