Ultrafast laser inscription of a 121-waveguide fan-out for astrophotonics

Robert Thomson, Rob Harris, Tim Birks, Graeme Brown, Jeremy R. Allington-Smith, J. Bland-Hawthorn

Research output: Contribution to journalLetterpeer-review

78 Citations (Scopus)


Using ultrafast laser inscription, we report the fabrication of a prototype three-dimensional 121-waveguide fan-out device capable of reformatting the output of a 120-core multicore fiber (MCF) into a one-dimensional linear array. When used in conjunction with an actual MCF, we demonstrate that the reformatting function using this prototype would result in an overall through put loss of ˜7.0??dB. However, if perfect coupling from the MCF into the fan-out could be achieved, the reformatting function would result in an overall loss of only ˜1.7??dB. With adequate development, similar devices could efficiently reformat the output of so-called “photonic lanterns” fabricated using highly multicore fibers.

Original languageEnglish
Pages (from-to)2331-2333
JournalOptics Letters
Issue number12
Early online date2 May 2012
Publication statusPublished - 8 Jun 2012


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