White LED based Faraday current sensor using a quartz wavelength encoder

G. D. Li*, R. A. Aspey, G. R. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The use of polychromatic light with chromatic modulation has been shown to provide a different approach to Faraday current sensing. In this contribution the use of purely white LEDs along with a quartz rotary encoder and a multiple reflection Faraday sensing element is described for realizing a practical form of a chromatic modulation Faraday current sensor. It is shown that such a sensor embodiment leads to a system sensitivity, for a chromatic system, which is approximately a factor of three times higher than previously reported (0.65 nm A-1 compared with 0.19 nm A-1).

Original languageEnglish (US)
Pages (from-to)44-48
Number of pages5
JournalOptics Communications
Issue number1
StatePublished - Apr 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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