Using an antireflection coating (ARC) design approach, an anatase TiO? film with an optimized thickness of 110?nm was experimentally deposited on quartz substrates through a CO? laser-assisted deposition process combining spin-coating and laser sintering. A heat-transfer model guided the optimization of laser processing parameters to achieve effective sintering without inducing phase transformation. Optical microscopy revealed enhanced NP necking and coalescence under laser treatment. Raman spectroscopy confirmed complete solvent removal and preservation of the anatase phase with improved crystallinity and no rutile formation. Optical properties were characterized, and the AR performance was verified using UV/Vis/NIR spectrophotometry. The sintered coatings exhibited transmittance exceeding 91% in selected spectral regions. In the yellow?green wavelength range, e.g., at 532 nm, the 110?nm AR coating exhibited reflectance comparable to the uncoated quartz substrate. Reflectance measurements confirmed the ARC performance, showing a minimum in this spectral range. To account for porosity, an effective medium approach was applied to evaluate the refraction and absorption indices of the sintered TiO? framework. These findings demonstrate the potential of CO? laser processing as a non-destructive route for tailoring high-transparency AR coatings.?This study provides a comprehensive understanding of laser-assisted NP-based transparent coatings and their potential applications in advanced optical and anti-reflection (AR) technologies.