<p>The present study aims to investigate the optical and structural characteristics of CuMn₂O₄GO and CuMn₂O₄GOFe₃O₄ nanocomposites in comparison to CuMn₂O₄ nanoparticles, with the goal of exploring linear, nonlinear, and photonic applications. X-ray diffraction (XRD) analysis determined the crystallite sizes for CuMn₂O₄, CuMn₂O₄GO, and CuMn₂O₄GOFe₃O₄ samples synthesized by the co-precipitation method to be 16.31, 4.76, and 11.86&#xa0;nm, respectively. SEM images demonstrate that the particles were generally well-dispersed and mostly spherical to hexagonal in shape. By analyzing the reflectance data through the Tauc model, the direct band gap energies were found to be 2.06&#xa0;eV, 2.08&#xa0;eV, and 2.18&#xa0;eV for CuMn₂O₄, CuMn₂O₄GO, and CuMn₂O₄GOFe₃O₄ samples, respectively. To examine the NLO properties of the nanopowders, the Z-scan method was utilized with a 532&#xa0;nm Nd: YAG laser at incident powers of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(P_{0}\)</EquationSource> </InlineEquation> = 20, 25, and 30 mW. The nonlinear absorption coefficient and refractive index determined by the Z-scan method were approximately (10³) and (10⁹), respectively. At <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(P_{0}\)</EquationSource> </InlineEquation> = 30 mW, for CuMn₂O₄, CuMn₂O₄GO, and CuMn₂O₄GOFe₃O₄, the NLR and NLA reverse saturable absorption reactions are observed at 3.04 × 10⁻⁹, 3.98 × 10⁻⁹, and 10.3 × 10⁻⁹ m²/W, and 8.6 × 10⁻³, 6.4 × 10⁻³, and 5 × 10⁻³&#xa0;m/W, respectively. The exceptional nonlinear optical (NLO) coefficients of the prepared nanopowders emphasize their potential for creating ultrafast lasers, anti-laser optical limiters, and two-photon microscopy.</p>