Theoretical description and design of a fast-light enhanced helium-neon ring-laser gyroscope

Joseph E. Schaar, Honam Yum, Selim M Shahriar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations


We describe an enhanced rotation sensor involving an active helium-neon (HeNe) ring laser coupled to a passive enhancement resonator, which has been named a fast-light-enhanced HeNe ring-laser gyroscope (RLG). Theoretical rotation sensitivity enhancements as large as two orders of magnitude are presented. The physical effect responsible for the increased rotational sensitivity is the anomalous dispersion of the enhancement resonator, which produces a larger beat frequency as compared to a standard HeNe ring-laser gyroscope (RLG) as the laser cavity is rotated. We present the layout of the fast-light enhanced HeNe RLG, and we provide the theoretical modeling of the enhanced rotational sensitivity. A design is presented for the red HeNe (632.8 nm). The beat frequency is calculated with respect to rotation rate, which defines the useful range of operation for this highly sensitive RLG. Considerations for practical issues including laser-mirror reflectivity precision, unsaturated laser gain, and cavity-length stability are discussed.

Original languageEnglish (US)
Title of host publicationAdvances in Slow and Fast Light IV
StatePublished - May 13 2011
EventAdvances in Slow and Fast Light IV - San Francisco, CA, United States
Duration: Jan 23 2011Jan 25 2011


OtherAdvances in Slow and Fast Light IV
CountryUnited States
CitySan Francisco, CA


  • Ring-laser gyroscope
  • anomalous dispersion
  • coupled cavities
  • fast-light
  • helium-neon laser

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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