Two-core photonic crystal fibre for Doppler difference velocimetry

W. N. MacPherson, J. D C Jones, B. J. Mangan, J. C. Knight, P. St J Russell

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


We present the first application of a two-core photonic crystal fibre for fringe projection for use as a Doppler difference velocimeter. The two-core fibre projects a series of fringes when both cores are simultaneously illuminated with 633 nm light. Light scattered from moving particles is coupled into a separate multi-mode collection fibre and detected using a silicon detector and amplifier. The scattered signal is processed in the frequency domain to obtain the particle velocity component perpendicular to the fringes. © 2003 Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)375-380
Number of pages6
JournalOptics Communications
Issue number4-6
Publication statusPublished - 1 Aug 2003


  • Fibre optic sensor
  • Laser Doppler difference
  • Photonic crystal fibre
  • Velocity measurement


Dive into the research topics of 'Two-core photonic crystal fibre for Doppler difference velocimetry'. Together they form a unique fingerprint.

Cite this