Design of optically path-length-matched, three-dimensional photonic circuits comprising uniquely routed waveguides

Ned Charles*, Nemanja Jovanovic, Simon Gross, Paul Stewart, Barnaby Norris, John O'Byrne, Jon S. Lawrence, Michael J. Withford, Peter G. Tuthill

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

A method for designing physically path-length-matched, three-dimensional photonic circuits is described. We focus specifically on the case in which all the waveguides are uniquely routed from the input to output-a problem that has not been addressed to date and that allows for the waveguides to be used in interferometric measurements. Circuit elements were fabricated via the femtosecond laser directwrite technique. We demonstrate via interferometric methods that the fabricated circuits were indeed optically path-length matched to within 45 μm, which is within the coherence length required for many applications.

Original languageEnglish
Pages (from-to)6489-6497
Number of pages9
JournalApplied Optics
Volume51
Issue number27
DOIs
Publication statusPublished - 20 Sep 2012

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