Fiber Optic Gyro detects rotations by measuring phase differences in the light. The  sensor consists of: optical fiber, photonic integrated device, high-power light source, etc.

The Fiber Optic Gyro is easy to manufacture, robust against shock and vibration, and has a long lifetime with high reliability.

With decreased production cost via indigenous development of core components, Fiber Optic Gyros are currently used in a number of weapon systems including precision guided weapons.