Abstract
A novel laser crystal Nd: CaGd0.1Y0.9AlO4 (Nd3+: Ca(Y, Gd)AlO4) crystal has been successfully grown by Czochralski (CZ) method. With the introduction of Gd3+ ions, this crystal has a more disorder structure than that of the Nd: CaYAlO4 (Nd: CYA). The full width at half-maximum (FWHM) of the π polarization emission spectra at around 1365 nm for the Nd3+: Ca(Y, Gd)AlO4 crystal was 53 nm, which is larger than that of Nd: CYA (35 nm) crystals, provided clear evidence for the more disorder structure. Moreover, its wide absorption spectral was maintained compared to the Nd: CYA crystal. At the same time, the effective dual-wavelength continuous-wave laser operation at 1358.4 nm and 1374 nm was realized of the as-grown crystal for the first time. These results suggest that the Nd3+: Ca(Y, Gd)AlO4 crystal is a promising disordered laser host for solid laser operation at the wavelength longer than 1370 nm in the range of 1.3–1.4 µm.
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