Fig. 1. Structural diagram of laser. (a) Without applied voltage; (b) with applied saturation voltage

Fig. 2. Optical path for laser pumping

Fig. 3. Real time diffraction efficiencies for spolarization light and p polarization light

Fig. 4. Output laser wavelength versus applied electric field

Fig. 5. Output laser spectra at different positions of pump laser

Fig. 6. Output laser wavelength versus film thickness

Fig. 7. Output laser conversion efficiency at position with film thickness of 95 nm