Fig. 1. Laser experimental setup of diode-end-pumped continuous-wave and passively Q-switched Nd:SRA lasers.

Fig. 2. σ-polarized emission spectrum of an a-cut Nd:SRA crystal from 1000 to 1120 nm.

Fig. 3. Output power versus absorbed power of free-running diode-pumped Nd:SRA lasers.

Fig. 4. Laser wavelength of typical Nd:SRA laser under free-running mode.

Fig. 5. Output power versus absorbed power of diode-pumped Nd:SRA laser under the insertion of a YAG etalon for wavelength tuning.

Fig. 6. Typical laser wavelength after the insertion of the YAG etalon.

Fig. 7. Typical wavelength of dual-wavelength Nd:SRA laser after the insertion of the YAG etalon.

Fig. 8. Average output power versus absorbed power of passively Q-switched Nd:SRA laser.

Fig. 9. (a) Typical pulse trains and (b) single-pulse profile of passively Q-switched Nd:SRA laser.

Fig. 10. Evolution of (a) pulse width, (b) pulse repetition rate, (c) pulse energy, and (d) pulse peak power versus absorbed power.