Demonstration of a photonic crystal surface-emitting laser pumped Yb:YAG laser

We developed a cryogenically cooled Yb:YAG continuous wave oscillator directly pumped with a photonic crystal surface-emitting laser (PCSEL). A high slope efficiency of 65.7% was obtained at an output power of 208 mW. The beam quality was close to the diffraction limit, with M²<1.2 in both directions. To the best of our knowledge, this is the first PCSEL pumped solid state laser to be developed.