Fiber optic gyroscopes and the accomplishments of the DARPA-sponsored GPS guidance package program

LeFevre, V.C.; Lindberg, William R.

doi:10.1117/12.684470

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2012

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“…The FOG is a mature technology and was originally designed as a low-cost alternative to the Ring Laser Gyroscope [2][3]. Due to the solid-state optical configuration and fiber technology, the FOG's performance could lead to 0.001 deg/hr stability in miniature design [4][5].…”

Section: Introductionmentioning

confidence: 99%

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Amplitude Control of Phase Modulation for Dithered Closed-loop Fiber Optic Gyroscope

Chong¹,

Chong²,

Kim³

2012

Journal of the Optical Society of Korea

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The amplitude error of phase modulator used in closed-loop fiber optic gyroscope has occurred by the temperature dependency of the electro-optic coefficient, and also can be due to the square-wave dither signal which is generally applied for eliminating the deadzone. This error can cause bias drift and scale factor error. This paper analyzes the temperature dependency of the modulation amplitude and the relationship with the scale factor of the gyroscope, and deals with an amplitude control method. The error calculation logic considering the dither signal is implemented on the signal processing module. The result of experiments from a prototype gyroscope shows the effect of the modulation amplitude control and a considerable improvement on performances.

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Section: Introductionmentioning

confidence: 99%

“…With help received from the researchers in the field of interferometry and telecommunications, The FOG has proven to be a leading technology in various applications for imaging systems, antennas, precise aiming of telescopes, and navigation systems [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%