Dy³⁺-doped SrGdGa₃O₇ crystal was successfully grown through the Czochralski method and investigated in detail for its structural and optical features. Its crystallographic lattice parameters were optimized by Rietveld refinement based on XRD data. Polarized absorption spectra, polarized emission spectra, and fluorescence decay curves of Dy: SrGdGa₃O₇ crystal were analyzed. Absorption cross-sections at 452 nm corresponding to π- and σ-polarization were computed as 0.594×10^-21 and 0.555×10^-21 cm², respectively. Calculated effective J-O intensity parameters Ω₂, Ω₄, and Ω₆ were 5.495×10^-20, 1.476×10^-20, and 1.110×10^-20 cm², respectively. J-O analysis and emission spectra show that transition ⁴F_9/2→⁶H_13/2 of Dy: SrGdGa₃O₇ crystal has the highest fluorescence branching ratio and fluorescence intensity under 452 nm excitation within the visible spectral region, the emission cross-sections of π- and σ-polarization were 1.84×10^-21 and 2.49×10^-21 cm² at the wavelength of 574 nm, respectively. The measured radiative lifetime and fluorescence decay time of the Dy³⁺: ⁴F_9/2 level were 0.768 and 0.531 ms with a quantum efficiency of 69.1%. All these results reveal that Dy³⁺: SrGdGa₃O₇ crystal is a promising material for yellow lasers pumped with blue laser diodes.