Systems and methods for environmentally insensitive High-Performance Fiber-Optic Gyroscopes

Sanders, Steven J, Lewis, Jeffrey E, Mosor, Sorin, Doheny, David A, Tarleton, Norman Gerard and Taranta, Austin (Inventors) (2013) Systems and methods for environmentally insensitive High-Performance Fiber-Optic Gyroscopes. US2013044328.

Record type: Patent

Abstract

Systems and methods for environmentally insensitive high-performance fiber-optic gyroscopes are provided. In one embodiment, a loop closure electronics apparatus for a fiber optic gyroscope having an optical phase modulator characterized by a transfer function that includes an error component of at least second order is provided. The apparatus comprises: a first digital circuit that generates a digital bias modulation signal; a second digital circuit that generates a digital feedback signal; at least one digital-to-analog converter that produces an electrical signal that drives the phase modulator from the digital bias modulation signal and the digital feedback signal; and a compensator that includes an analog filter of at least second order and a digital filter of at least second order, wherein the analog filter and the digital filter pre-filter the electrical signal to compensate for the error component.

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