Improvement of accuracy of angular velocity detection in semiconductor fiber-optic ring laser gyroscope

Tomoki Ishida, Shuichi Tamura, Satoshi Simada, Keizo Inagaki, Shigeru Saito, Takahisa Harayama

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

4 Citations (Scopus)

Abstract

A semiconductor fiber-optic ring laser gyroscope (S-FOG) consists of a semiconductor optical amplifier (SOA) and optical fiber to form a ring cavity. The fiber ring cavity enables larger sizes and smaller scattering, while the SOA gain is shared by the clockwise (CW) and counterclockwise (CCW) propagating modes. When the S-FOG is rotated, a new beat signal called the Sagnac beat frequency is observed. We investigated the effect of the fiber ring cavity's length on detection characteristics. Detection sensitivity was not dependent on the number of laps of fiber ring cavity. However, when the cavity length became longer, the linewidth of Sagnac beat became narrower, and then accuracy of angular velocity detection improved. The relation between the linewidth Av of the Sagnac beat and cavity length P was proved to be Δ≈ -1.86.

Original languageEnglish
Title of host publication19th International Conference on Optical Fibre Sensors
DOIs
Publication statusPublished - 2008 Jun 26
Event19th International Conference on Optical Fibre Sensors - Perth, WA, Australia
Duration: 2008 Apr 152008 Apr 18

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7004
ISSN (Print)0277-786X

Conference

Conference19th International Conference on Optical Fibre Sensors
CountryAustralia
CityPerth, WA
Period08/4/1508/4/18

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Keywords

  • Beat frequency
  • Laser gyroscope
  • Linewidth
  • S-FOG
  • SOA
  • Sagnac effect
  • Scale factor

ASJC Scopus subject areas

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

Cite this

Ishida, T., Tamura, S., Simada, S., Inagaki, K., Saito, S., & Harayama, T. (2008). Improvement of accuracy of angular velocity detection in semiconductor fiber-optic ring laser gyroscope. In 19th International Conference on Optical Fibre Sensors [700450] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7004). https://doi.org/10.1117/12.786142