Efficient coupling of starlight into single mode photonics using Adaptive Injection (AI)

Barnaby Norris*, Nick Cvetojevic, Simon Gross, Alexander Arriola, Peter Tuthill, Jon Lawrence, Samuel Richards, Michael Goodwin, Jessica Zheng

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)
32 Downloads (Pure)


Using single-mode fibres in astronomy enables revolutionary techniques including single-mode interferometry and spectroscopy. However, injection of seeing-limited starlight into single mode photonics is extremely difficult. One solution is Adaptive Injection (AI). The telescope pupil is segmented into a number of smaller subapertures each with size ∼ r 0, such that seeing can be approximated as a single tip / tilt / piston term for each subaperture, and then injected into a separate fibre via a facet of a segmented MEMS deformable mirror. The injection problem is then reduced to a set of individual tip tilt loops, resulting in high overall coupling efficiency.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy VI
EditorsChristopher J. Evans, Luc Simard, Hideki Takami
Place of PublicationWashington, US
Number of pages8
ISBN (Electronic)9781510601956
Publication statusPublished - 2016
EventGround-Based and Airborne Instrumentation for Astronomy VI - Edinburgh, United Kingdom
Duration: 26 Jun 201630 Jun 2016

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


OtherGround-Based and Airborne Instrumentation for Astronomy VI
CountryUnited Kingdom

Bibliographical note

Copyright 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • Adaptive optics
  • Injection
  • Single mode Fibres
  • Single mode waveguides


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