➨It offers same compactness and cost like ring laser gyroscope (RLG) and MEMS gyroscope. ➨It offers high performance due to its inherent low random noise. Moreover it does not need any preventive maintenance. It is highly raliable and offers longer life time. ➨Since it is a solid state device with no moving part nor sealed cavity. Its rotational sensitivity is superior (~ 0.1 o/Hr) andįaster compare to conventional gyroscope. Poles based on measurements of angular velocity only. Hence it helps in determining direction of the Earth's When used along with accelerometer, it provides accurate path of flight or movement of vehicle or the object.īenefits or advantages of Fiber Optic Gyroscopeįollowing are the benefits or advantages of Fiber Optic Gyroscope:.The phase shift of fiber optic gyroscope is expressed as follows. The figure-2 depicts circular loop of fiber.Navigation, guidance and control of missiles, aircrafts, robots, automobiles, spacecrafts etc. It is also known as fiber optic rotation sensor.
The Sagnac effect depends on effective area of the closed optical path. The resultant differential phase shift is measured using interferometry in FOG. Due to Sagnac effect, the light beam travelling against the rotationĮxperiences a slightly shorter path delay compare to the other light beam.Split the radiation from the light source into two counter propagating waves viz.Ĭlockwise and counter clockwise, in the fiber coil and to recombine the waves,Īfter propagation, on a photodetector (PD). It consists of a passive interferometer where a coupler is used to.