Fig. 1. Experimental setup of diode-pumped Er∶YAG ceramic single frequency pulsed laser

Fig. 2. Pulse energy and pulse width versus incident pump power. (a) Pulse energy versus incident pump power under different pulse repetition rates without injection; (b) single frequency pulse energy and pulse width versus incident pump power at repetition rate of 200 Hz

Fig. 3. Spectra and waveforms. (a) Spectrum before injection; (b) spectrum after injection; (c) pulse waveform before injection; (d) pulse waveform after injection

Fig. 4. Heterodyne beating signal. (a) Heterodyne beating signal of single frequency pulse; (b) frequency spectrum of heterodyne beating signal

Fig. 5. Change of parameters of input pulse. (a) Build-up time versus pump power; (b) beam quality of diode-pumped Er∶YAG ceramic single-frequency pulsed laser

Fig. 6. Energy stability under highest energy of single-frequency pulse in 30 min