Fig. 1. Space triaxial laser gyroscope. (a) Schematic diagram of light path; (b) Physical map

Fig. 2. Power curves of three channels of experimental laser gyroscope in 50 days before the end of life

Fig. 3. Allan variance diagram of experimental laser gyroscope (a) in normal operation and (b) after the end of life

Fig. 4. (a) Physical map and (b) partial schematic diagram of glass-ceramic in discharge region

Fig. 5. (a) Image of test of glass-ceramic; (b) Schematic diagram of selected test area

Fig. 6. Intensity curves with sputtering depth of Si⁺, Al⁺ and Li⁺ in different area

Fig. 7. (a) Imaging chart of Si⁺, Al⁺ and Li⁺ on the boundary of the glass-ceramic in discharge region at 10 nm depth; (b) Li⁺/Si⁺ ratio of different area

Fig. 8. (a) Diagram of test area of inner and outer surface of the cathode; (b) Intensity curves of Li⁺ with sputtering depth on Area1 and the outer surface of cathode and (c) in three areas on the inner surface of cathode

Fig. 9. Intensity curves of Li⁺ with sputtering depth on the surface of film of mirror in discharge and non-discharge area

Fig. 10. Electric field distribution of laser gyroscope and its local magnification