Fig. 1. Simplified diagram of high quality squeezed light source

Fig. 2. Waist radius deviation β versus waist position deviation α in symmetrical OPA under different mode-matching efficiencies

Fig. 3. Waist radius deviation β versus waist position deviation α in asymmetrical OPA under different mode-matching efficiencies

Fig. 4. Waist radius deviation β versus waist position deviation α in MC under different mode-matching efficiencies

Fig. 5. Mode-matching efficiency of MC versus incident light ellipticity when incident light is elliptical one

Fig. 6. Waist radius deviation β versus waist position deviation α under different incident light ellipticities when mode-matching efficiency of MC is 98%

Fig. 7. (a) Mode-matching efficiency of 1064 nm MC1 (insert shows enlargement of dotted region); (b) beam quality of fundamental laser output (insert shows intensity distribution of output laser spot)

Fig. 8. (a) Mode-matching efficiency of 1064 nm MC2 (insert shows enlargement of dotted region); (b) beam quality of MC1 output (insert shows intensity distribution of output laser spot)