Fig. 1. Schematics of experimental setup. (a) Schematics of frequency doubling light generation and cavity length locking system; (b) miniaturized external cavity resonant frequency doubler

Fig. 2. Temperature characteristics of different length MgO∶PPLN crystals with single pass frequency doubling

Fig. 3. Single pass frequency doubling efficiency versus crystal length

Fig. 4. Efficiency of external cavity resonant frequency doubling versus crystal length

Fig. 5. Efficiency of external cavity resonate frequency doubling versus fundamental light power

Fig. 6. Output power stability of miniaturized resonant frequency doubler