Fig. 1. Schematic diagram of the injection-locked single-frequency 1342 nm laser

Fig. 2. Output power of the 1342 nm ring laser versus absorbed pump power without injection

Fig. 3. Beam radius in laser crystal in versus focal length of thermal len

Fig. 4. Output power of injection-locked laser and backward power versus the seed power with absorbed pump power of 75 W

Fig. 5. Dependence of the output power from the seed wavelength with seed power of 20.65 mW

Fig. 6. Transmitted intensity of the scanned F-P interferometer for the 1342 nm inject-locked laser output (Inset: magnified profile of one transmitted peak)

Fig. 7. Beam quality factor M² measured at maximum output power (Inset: 2D beam intensity profile)

Fig. 8. Measurement of the power stability and wavelength stability of the locked laser