AlGaInP-based VECSEL for strontium clock transitions

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Red-emitting optically-pumped vertical-external-cavity surface-emitting-lasers (VECSELs) are an interesting platform for compact, low noise, and high spatial and spectral brightness laser systems targeting narrow linewidth transitions used in strontium-based optical clocks. Recently, we have demonstrated sub-kHz linewidth operation at 689 nm when pumped by either green or blue lasers. Here we report the development and characterisation of an AlGaInP-based VECSEL targeting ionic and neutral strontium-based optical clock transitions at 674 and 698 nm, respectively. Both systems have single frequency output powers >100 mW in a circularly-symmetric transverse mode, achieving sub-200 Hz linewidth with low-loss, single-stage frequency-stabilisation.
Original languageEnglish
Publication statusPublished - 30 Sept 2021
EventSPIE Photonex and Vacuum Technologies: Quantum Technology - Scottish Event Campus, Glasgow, United Kingdom
Duration: 28 Sept 202130 Sept 2021


ConferenceSPIE Photonex and Vacuum Technologies
Country/TerritoryUnited Kingdom


  • AIGaInP
  • strontium clock transitions
  • SDL
  • optical clocks
  • red lasers
  • strontium
  • narrow linewidth


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