Fig. 1. Schematic of 532 nm laser

Fig. 2. Schematic of π light and σ light paths in V-type oscillator

Fig. 3. Transmittance curves of birefringence filter. (a) Transmittance versus θ₂; (b) transmittance versus λ

Fig. 4. Output spectra of fundamental modes in resonator without KTP under different pump power

Fig. 5. Electing-frequency characteristics of birefringence filter with different lengths of KTP

Fig. 6. Output spectrum of SLM operation measured by Fabry-Perot scanning interferometer

Fig. 7. SLM output power versus pump power

Fig. 8. Temperature characteristic ofsingle-frequency operation

Fig. 9. Influence of temperature change ΔT on transmittance of birefringent filter with a 5-mm-long KTP