Simple tunable phase-locked lasers for quantum technologies

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Agnew, Nicola and Lowit, David and Arnold, Aidan S. (2026) Simple tunable phase-locked lasers for quantum technologies. EPJ Quantum Technology. ISSN 2196-0763 (https://doi.org/10.1140/epjqt/s40507-026-00516-9)

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Abstract

In a wide range of quantum technology applications, ranging from atomic clocks to the creation of ultracold samples for atom interferometry, optimal laser sources are critical. In particular, two phase-locked laser sources with a precise difference frequency are needed for efficient coherent population trapping (CPT) clocks, gray molasses laser cooling, or driving Raman transitions. Here we show how a simple cost-effective laser diode can selectively amplify only one sideband of a fiber-electrooptically-modulated seed laser to produce moderate-power phase-locked light with sub-Hz relative linewidth and tunable difference frequencies up to ≈ 15 GHz. The architecture is readily scalable to multiple phase-locked lasers and could conceivably be used for future on-chip compact laser systems for quantum technologies.

ORCID iDs

Agnew, Nicola, Lowit, David and Arnold, Aidan S. ORCID logoORCID: https://orcid.org/0000-0001-7084-6958;
  • Item type:Article
    ID code:96235
    Dates:
    Date
    Event
    4 May 2026
    Published
    4 May 2026
    Published Online
    27 April 2026
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:12 May 2026 13:54
    Last modified:03 Jun 2026 10:19
    URI:https://strathprints.strath.ac.uk/id/eprint/96235
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