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Proceedings Article

Fiber-optic gyroscope operated with a frequency-modulated laser

[+] Author Affiliations
Stéphane Blin

Ecole Nationale Superieure des Sciences Appliquées et de Technologie (France)

Michel J. F. Digonnet, Gordon S. Kino

Stanford Univ.

Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70044X (May 16, 2008); doi:10.1117/12.786165
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From Conference Volume 7004

  • 19th International Conference on Optical Fibre Sensors
  • David D. Sampson
  • Perth, WA, Australia | April 14, 2008

abstract

We propose using a frequency-modulated laser in a fiber-optic gyroscope (FOG) in a minimum configuration. Compared to the traditional broadband source, a narrow-band laser offers two significant advantages, namely the elimination of excess noise and thus improved sensitivity to rotation, and a more stable mean wavelength, hence a greater scale-factor stability. We show that the strong back-reflection and coherent backscattering noise introduced by the use of a laser is greatly reduced by modulating the laser frequency. In both a conventional FOG and in a FOG using an air-core fiber, we demonstrate experimentally that this technique reduces these two sources of noise by at least a factor of 4 compared to the same gyros operated with an unmodulated laser.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Stéphane Blin ; Michel J. F. Digonnet and Gordon S. Kino
"Fiber-optic gyroscope operated with a frequency-modulated laser", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70044X (May 16, 2008); doi:10.1117/12.786165; http://dx.doi.org/10.1117/12.786165


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