The FORG (Fibre Optic Resonant Gyroscope) opeeration principle uses arecirculating ring resonant cavity to get a rotation-induced Sagnac effectenhancement (cited by Ezekiel and Balsamo). It grants to a FORG a comparablesensitivity in relation an I-FOG (Interferometric Fibre Optic Gyroscope)thathas the fiber lenght equal a half of finesse factor times longer. Otheradvantages is despite of thermal drift because the FORG uses less quantity offibre than the I-FOG, giving to the first less thermal drift sensitivity thanthe last. The proposal of this work is to show a applied to a FORG techniquethat simplifies the signal treatment, employing all digital setup, resulting ina maximally flat scale factor. In this investigation are presented over thesimulations results, employing the modified digital FM spectrometry techniquesby decimation and interpolation techniques over a ring resonator that pursuit a10 meters SM-PM lenght fiber coil and 10 centimeters of diameter, with a 1550nanometers laser source. The advantages of these techniques are to simplify theelectronic circuitry, offering an upgrade facility, using only one DSP (DigitalSignal Processor), realizing all needed functions. The investigation of thismethod is based in a optical field switching scheme and digital frequencydomain spectrometry.
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