Lead or support material and substrate qualification across polymers, glass, lithium niobate, silicon carbide, and other advanced optical materials Define sample requirements, test plans, acceptance criteria, and data packages for internal and external technical initiatives Perform and interpret optical measurements, including transmission, reflectance, refractive index, absorption, haze, scattering, efficiency … process revisions Develop and refine fabrication processes, including wafer cleaning, nanoimprinting, thin‐film coating, laser cutting, blackening, and waveguide stacking Develop reliability and mechanical test strategies covering flexural strength, impact and drop resistance, thermal exposure, UV weathering, humidity, dynamic fatigue, adhesion, and geometric stability Translate optical and process requirements ...