Simple tunable phase-locked lasers for quantum technologies

Research output: Working paperWorking Paper/Preprint

Abstract

In a wide range of quantum technology applications, ranging from atomic clocks to the creation of ultracold or quantum degenerate 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 ≈15GHz. The architecture is readily scalable to multiple phase-locked lasers and could conceivably be used for future on-chip compact phase-locked laser systems for quantum technologies.
Original languageEnglish
Place of PublicationIthaca, NY
Number of pages4
DOIs
Publication statusPublished - 25 Apr 2024

Funding

Engineering and Physical Sciences Research Council EP/T001046/1; National Physical Laboratory iCASE studentship EP/X525017/1.

Keywords

  • quantum technologies
  • phase-locked lasers
  • laser diode
  • tunable laser

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