Fig. 1. Fabrication process of YAG ceramic by co-precipitation and vacuum sintering method.

Fig. 2. Fabrication process of YAG ceramic by reactive sintering method.

Fig. 3. Photograph of different rare-earth doped YAG transparent ceramics fabricated in-house.

Fig. 4. The in-line transmittance of Ho:YAG and Er:YAG transparent ceramics with different doping concentrations.

Fig. 5. The microstructures of the RE:YAG ceramics fabricated in-house: (A) Er:YAG, (B) Ho:YAG, (C) Tm:YAG, and (D) Nd:YAG.

Fig. 6. The absorption and emission spectra of the fabricated Nd:YAG ceramics.

Fig. 7. A schematic of the Nd:YAG ceramic laser setup.

Fig. 8. Laser performance of the Nd:YAG ceramic lasers.

Fig. 9. The absorption and emission spectra of the fabricated Yb:YAG ceramics.

Fig. 10. Laser performance of the Yb:YAG ceramic lasers.

Fig. 11. The absorption and emission spectra of the fabricated Yb:LuAG ceramics.

Fig. 12. Laser performance of the Yb:LuAG ceramic lasers.

Fig. 13. The absorption and emission spectra of the fabricated Er:YAG ceramics.

Fig. 14. A schematic of the Er:YAG ceramic laser setup.

Fig. 15. Laser performance of the Er:YAG ceramic laser.

Fig. 16. The absorption and emission spectra of the fabricated Ho:YAG ceramics.

Fig. 17. A schematic of the Ho:YAG ceramics laser setup.

Fig. 18. Laser performance of the Ho:YAG ceramic laser.

Fig. 19. The transmittance and emission spectra of a fabricated Tm:YAG ceramic.

Fig. 20. A schematic of the diode-pumped Tm:YAG ceramic laser setup.

Fig. 21. Laser performance of the Tm:YAG ceramic lasers.