Fig. 1. System block diagram and MG-Y laser structure

Fig. 2. Test system of MG-Y laser

Fig. 3. Flow chart of fuzzy PID control algorithm based on orthogonal experiments

Fig. 4. Flow chart of wavelength calibration

Fig. 5. Tuning characteristics of I_phase

Fig. 6. Simulation and test results of three algorithms

Fig. 7. Stability of MG-Y laser output power in 60 min

Fig. 8. Stability of MG-Y laser wavelength in 30 min

Fig. 9. Spectra of MG-Y laser before and after wavelength calibration