TARCIO DE ALMEIDA VIEIRA
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Artigo IPEN-doc 29783 High-power Nd:YLF four-level lasers with 68% slope efficiency2023 - PRADO, FELIPE M.; FRANCO, TOMAS J.; VIEIRA, TARCIO de A.; WETTER, NIKLAUS U.Three laser resonators are demonstrated emitting at 1053 nm and pumped at 797 nm by volume Bragg gratingequipped diodes, achieving the highest reported efficiencies for Nd:YLF in a four-level system, to the best of our knowledge. A peak output power of 880 W is achieved by pumping the crystal with a diode stack of 1.4 kW of peak pump power.Artigo IPEN-doc 28683 Nd:YLF laser at 1053 nm diode side pumped at 863 nm with a near quantum-defect slope efficiency2022 - VIEIRA, TARCIO de A.; PRADO, FELIPE M.; WETTER, NIKLAUS U.Laser emission at the 1053 nm transition of Nd:YLF4 is demonstrated using diode-side-pumping at 863 nm directly into the emitting level. The laser configuration uses one total internal reflection at the pump face and provides the highest slope efficiency reported for the Nd:YLF4 medium, close to the quantum limit. In quasi-continuous mode, the laser operates with diffraction-limited beam quality and 78.2% slope efficiency with 14.4 W of output power. In continuous mode, 75.7% slope efficiency in both single-mode and multimode operation is achieved, with 13.5 W output power.