Laser written multiport quantum circuits

Zachary Chaboyer*, Thomas Meany, L. G. Helt, M. J. Steel, Michael J. Withford

*Corresponding author for this work

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


We perform a rigorous characterisation of multiport waveguide circuits. These devices were fabricated using an ultrafast laser inscription process which permits uniquely three-dimensional circuit fabrication not possible using standard lithographic means. To infer device manipulation of an arbitrary input state of light (i.e. intensity and phase transformations), we perform device interrogation with coherent input states. We demonstrate that the inscription process, and output from coherent state interrogation combined with a maximum likelihood estimation algorithm, provide a rapid prototyping system for waveguide circuits acting on quantum states of light. This opens the way for more advanced multiport structures exploiting additional paths, input states and arbitrary phase relationships.

Original languageEnglish
Title of host publicationAdvances in Photonics of Quantum Computing, Memory, and Communication VIII
EditorsZameer U. Hasan, Philip R. Hemmer, Hwang Lee, Alan L. Migdall
Place of PublicationBellingham, Washington
Number of pages6
ISBN (Print)9781628414677
Publication statusPublished - 2015
EventAdvances in Photonics of Quantum Computing, Memory, and Communication VIII - San Francisco, United States
Duration: 10 Feb 201512 Feb 2015

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


OtherAdvances in Photonics of Quantum Computing, Memory, and Communication VIII
Country/TerritoryUnited States
CitySan Francisco


  • Quantum technology
  • Non-classical light
  • Integrated optics


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