Multiwavelength laser action of Nd3+:YAlO3 single crystals grown by the laser heated pedestal growth method

Abstract We describe the growth of high quality transparent fibers of pure and Nd-doped YAlO3 from unreacted pedestals (green rods) by the laser heated pedestal growth technique. The X-ray diffraction analysis shows that the fibers are monocrystalline, with a distorted Pnma perovskite structure and grow along 〈0 1 0〉 direction (b axis). In this work, multi-wavelength laser action is demonstrated for these fibers in the two main laser channels of Nd3+ ions. In the 4F3/2 → 4I11/2 laser transition, low threshold multi-wavelength laser emission is obtained at wavelengths of 1065, 1073 and 1081 nm. Additionally, for the first time in LHPG grown YAlO3 fibers, laser action in the 4F3/2 → 4I13/2 transition is demonstrated at a wavelength of 1341 nm.