The paper introduces a 24-channel air-trench isolated Silica-based VOA array. The air trenches thermally insulate the VOAs with etched-free waveguide technologies. Reactive ion etching and wet etching were used at different channel locations to suppress thermal crosstalk and reduce power consumption. https://www.bekindtopets.com/limited-deal-Neutral-Checkered-Galaxy-Note-10-Pro-Case-p51042-best-super/