A micro-optical module for multi-wavelength addressing of trapped ions

Matthew L. Day, Kaushal Choonee, Zachary Chaboyer, Simon Gross, Michael J. Withford, Alastair G. Sinclair*, Graham D. Marshall

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
22 Downloads (Pure)


The control of large-scale quantum information processors based on arrays of trapped ions requires a means to route and focus multiple laser beams to each of many trapping sites in parallel. Here, we combine arrays of fibres, 3D laser-written waveguides and diffractive microlenses to demonstrate the principle of a micro-optic interconnect suited to this task. The module is intended for use with an ion microtrap of 3D electrode geometry. It guides ten independent laser beams with unique trajectories to illuminate a pair of spatially separated target points. Three blue and two infrared beams converge to overlap precisely at each desired position. Typical relative crosstalk intensities in the blue are 3.6 10-3 and the average insertion loss across all channels is 8 dB. The module occupies ∼104 times less volume than a conventional bulk-optic equivalent and is suited to different ion species.

Original languageEnglish
Article number024007
Pages (from-to)1-13
Number of pages13
JournalQuantum Science and Technology
Issue number2
Publication statusPublished - Apr 2021

Bibliographical note

Copyright © 2021 The Author(s). Published by IOP Publishing Ltd. 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.


  • diffractive microlenses
  • laser-written waveguides
  • ion microtrap
  • micro-optics


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