“…Waveguide lasers have been already fabricated in this material (in both single crystals and polycrystalline ceramics) by using a few techniques, such as ion implantation, femtosecond laser inscription, femtosecond laser ablation, film deposition, and waveguide lasers have been generated in some of these samples [18][19][20][21][22][23]. Despite the fact that PBW has been recently demonstrated to be a powerful technique for the fabrication of high quality channel waveguides in Nd:YAG with 3D control [16], the suitability of the obtained waveguides as integrated laser gain medium has not, to the best of our knowledge, been reported up to now. In this work, we report on the first demonstration of continuous wave stable laser operation at 1064 nm at room temperature from a 808 nm pumped Nd:YAG channel waveguide fabricated by PBW.…”