Fig. 1. Structure schematic of the ring laser

Fig. 2. Numerical results of plasma dispersion function. (a) Real part of dispersion function; (b) imaginary part of dispersion function; (c) first derivative of dispersion function real part; (d) first derivative of dispersion function imaginary part

Fig. 3. Simulation results of intensity tuning curves in ring laser. (a) Intensity tuning curves under Ne²⁰∶Ne²²=1∶1, 400 Pa pressure; (b) intensity tuning curves of Ne²⁰∶Ne²²=7∶3, 400 Pa pressure

Fig. 4. Simulation results of intensity tuning curves in ring laser. (a) Intensity tuning curves of Ne²⁰∶Ne²⁷=1∶1, 400 Pa pressure; (b) intensity tuning curve of Ne²⁰∶Ne²⁷=7∶3, 400 Pa pressure

Fig. 5. Linear type detection system of laser gyro intensity tuning curve

Fig. 6. Spectrum of the oscillation longitudinal mode in ring laser

Fig. 7. Schematic of detection method of intensity tuning curve in laser gyro. (a) Longitudinal mode is swept and intensity tuning curve is obtained; (b) voltage of mode sweeping

Fig. 8. Test results of intensity tuning curve of single longitudinal mode operated laser gyro. (a) Test result of Ne²⁰∶Ne²²=7∶3; (b) test result of natural Ne isotope mixture gas