Amplification by stimulated emission of nitrogen-vacancy centres in a diamond-loaded fibre cavity

Sarath Raman Nair*, Lachlan J. Rogers, Xavier Vidal, Reece P. Roberts, Hiroshi Abe, Takeshi Ohshima, Takashi Yatsui, Andrew D. Greentree, Jan Jeske, Thomas Volz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)
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Laser threshold magnetometry using the negatively charged nitrogen-vacancy (NV-) centre in diamond as a gain medium has been proposed as a technique to dramatically enhance the sensitivity of room-temperature magnetometry. We experimentally explore a diamond-loaded open tunable fibre-cavity system as a potential contender for the realisation of lasing with NV- centres. We observe amplification of the transmission of a cavity-resonant seed laser at 721 nm when the cavity is pumped at 532 nm and attribute this to stimulated emission. Changes in the intensity of spontaneously emitted photons accompany the amplification, and a qualitative model including stimulated emission and ionisation dynamics of the NV- centre captures the dynamics in the experiment very well. These results highlight important considerations in the realisation of an NV- laser in diamond.

Original languageEnglish
Pages (from-to)4505–4518
Number of pages14
Issue number15
Early online date28 Sept 2020
Publication statusPublished - Nov 2020

Bibliographical note

Copyright 2020 Sarath Raman Nair et al., published by De Gruyter. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • diamond colour centres
  • fibre cavity
  • laser threshold magnetometry
  • nitrogen-vacancy centres
  • NV charge state switching
  • NV-stimulated emission


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