Towards room-temperature laser magnetometry with NV centres in open fibre cavities

Sarath Raman Nair; Sarath Raman Nair; Lachlan J. Rogers; Lachlan J. Rogers; Jan Jeske; Jan Jeske; Xavier Vidal; Andrew Wood; Andrew Wood; Fedor Jelezko; Andrew D. Greentree; Andrew D. Greentree; Thomas Volz; Thomas Volz

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
OSA Technical Digest (Optica Publishing Group, 2019),
paper jsv_2_3

Towards room-temperature laser magnetometry with NV centres in open fibre cavities

Sarath Raman Nair, Lachlan J. Rogers, Jan Jeske, Xavier Vidal, Andrew Wood, Fedor Jelezko, Andrew D. Greentree, and Thomas Volz

European Quantum Electronics Conference 2019

Munich Germany
23–27 June 2019
ISBN: 978-1-7281-0469-0

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Magnetometry and biological imaging (jsv_2)

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S. R. Nair, L. J. Rogers, J. Jeske, X. Vidal, A. Wood, F. Jelezko, A. D. Greentree, and T. Volz, "Towards room-temperature laser magnetometry with NV centres in open fibre cavities," in 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, OSA Technical Digest (Optica Publishing Group, 2019), paper jsv_2_3.

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Abstract

Magnetic sensing with lasing from negatively charged nitorgen-vacancy (NV) centres in diamond is predicted to reach $f T / \sqrt{H z}$ regime even at room temperature [1]. Stimulated emission from NV centres has already been explored as a stepping stone towards such a laser magnetometer [2, 3, 4] . Here we report the observation of amplification on the cavity transmission of an open fibre cavity formed between a fibre-miror and a macroscopic mirror, loaded with a high NV density diamond sample. On adding green laser light to optically pump the NV centres, we observe amplification on the transmitted seed wavelength close to 720 nm up to a factor around 3.

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