Trivalent Neodymium-Doped Double Molybdate/Tungstate Composite Laser Crystals

• DOI: 10.1021/acs.cgd.3c00926
• Publication Date: 2023-11-17T18:00:54Z
• Authors: Shoujun Ding; Haitang Hu; Yong Zou; Chuancheng Zhang; Miaomiao Wang; Wenpeng Liu; Qingli Zhang
• Keywords: Tungstate; Crystal (programming language); Tetragonal crystal system

The use of inhomogeneous broadening in composite disordered crystals has been widely recognized as a successful approach to enhancing the spectral bandwidth rare-earth ions optical spectra. In this study, laser alkali metal double molybdate/tungstate, doped with 2 atom % Nd3+ and represented by general formula Nd:NaGd(MoxW1–xO4)2 (x = 0.5, 0.7 0.9), were grown using Czochralski method. crystal structure was determined be tetragonal phase space group I41/a, confirmed through X-ray diffraction (XRD) Rietveld refinement analyses. spectroscopic properties crystal, encompassing absorption, emission, fluorescence decay characteristics investigated. (MoO4)1.0(WO4)1.0 exhibited an exceptionally broad absorption bandwidth, full width at half-maximum (FWHM) 21 808 nm, approximately 10 times wider than that well-known Nd:YAG crystal. Moreover, demonstrated generation continuous-wave 1.06 μm laser, which further frequency-doubled produce 532 nm laser. Additionally, passively Q-switched behavior explored, utilizing tungsten disulfide saturable absorber. summary, molybdate/tungstate exhibits advantageous characteristics, such low melting point (approximately 1200 °C), stable physical–chemical properties, remarkable properties. These features highlight potential applications these all solid-state lasers. High-quality Nd-doped By implementing engineering strategy, fwhm up achieved.