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iXblue insights – Fiber-Optic Gyroscopes

The FOG (Fiber-Optic Gyroscope) is the result of more than 30 years of research and development and is today considered to be the best gyroscope in the world: its performance is deemed genuinely unlimited.

Based on the Sagnac effect, FOGs are passive systems that use light to calculate motion. Rotations movements are measured by sending identical laser beams, in opposite directions, through a long fiber-optic coil.The laser beam travelling against the direction of rotation experiences a slightly shorter path delay than the other beam. Measuring the phase shift between the two beams reveals changes in orientation.Objects being free to rotate in three dimensions, iXblue’s Fiber-optic based inertial navigation systems contains three FOG gyroscopes, measuring rotations on those three different axis.

Fiber-Optic Gyroscope (FOG) is the only field-proven technology that provides both unrivaled performance and reliability. This is why over 50 of the world’s navies are already using this technology to equip their platforms, from submarines to first-rate frigates. FOG being robust at great water depths and under extreme temperature variations, more than 80% of the underwater vehicles used in the Oil &Gas industry also rely on them for navigation.

Learn more about the FOG technology by watching this video.