Single - axis missile fiber optic gyroscope requires a light source  with a band width> 10 nm and  output power > 0.5 mW  .The commercial FOGs   weigh  200-250gms with a physical size of 100mmX100mmX50mm..The type of light source for missile fiber optic gyroscope is selected by operating wavelength, wavelength stability with temperature, volume and physical size. Incase of space fiber gyroscopes, the source should be insensitive to high energy radiation like proton and gamma radiations as well. Large bandwidth light source contributes to small bias drift by gyroscope. A small volume and light weight Single Pass Backward Signal Er3+ doped Super-fluorescent Fiber source was developed using only four commercially available components for use in missile single axis fiber optic gyroscope .The bandwidth and output power of the source are 30. 507nm and1.318mW  respectively. We presented the experimental results along with non-flattened ASE spectrum. The packed super-fluorescent fiber  source   has   a volume of 100mm X 100mm X 25mm  and a weight of 150 grams which to our knowledge the  smallest  in volume and light in weight ever reported.
The application of integrated optical components into a single module provides a method of increasing the level of integration with the real potential of reducing unit cost and raising the reliability. A new method was used to design a micro-optical transceiver module of an interferometric fiber optic gyroscope (IFOG) system. By using free-space optical coupling method, all optical parts except a phase modulator and the sensing coil were built in a single module to form the active configuration of the IFOG, including a SLD chip, a photoelectric detector, a beam splitter and a light source driving circuit. Very small optical elements were used in the micro-optical transceiver, and the driving circuit of the light source was optimized and integrated by using thick film integrated technology into the transceiver. Reducing the number of optical components makes size smaller and assembling-cost lower. A gyro test which was composed of the transceiver module connecting to a phase modulator and the polarization-mode (PM) fiber coil of 800 m in length was carried out. The bias stability of IFOG is about 0.63 degrees/hour. Experimental results show that this optical transceiver will dominate the entire low- and medium performance range of IFOG system.
:Proposed in this paper the multiplexing technology of three axis of fiber optic gyroscope integrated design technology, this kind of fiber optic gyroscope has high reliability, fast operation and reaction, triaxial output synchronization, three axis scale factor and its nonlinear affected by light source is the same, and small volume, light weight, low consumption, especially suitable for gyro miniaturization, lightweight requirements to weapons system.