AlGaInP-based VECSEL for strontium clock transitions

Moriya, Paulo H. and Hastie, Jennifer E. (2021) AlGaInP-based VECSEL for strontium clock transitions. In: SPIE Photonex and Vacuum Technologies, 2021-09-28 - 2021-09-30, Scottish Event Campus.

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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.


Moriya, Paulo H. ORCID logoORCID: and Hastie, Jennifer E. ORCID logoORCID:;