High-Quality Square Groove Quartz Substrate for Fiber Couplers Supplier, Factories

Precision quartz capillary tubes are widely employed in analytical instruments such as gas/liquid chromatography, capillary electrophoresis, optical fiber pigtails, flow cells, and medical sampling devices requiring high dimensional stability and superior optical clarity.

Fluorine acts as an index-lowering dopant in silica glass. Fluorine-doped fused silica tubes feature a lower refractive index than pure silica, making them ideal for optical cladding in high-power fiber lasers, light-guiding capillaries, and micro-optical waveguiding systems.

With state-of-the-art precision drawing processes, inner diameter (ID) and outer diameter (OD) tolerances can be maintained within ±0.002 mm to ±0.010 mm, ensuring concentricity and minimal bore variation throughout the entire length.

Quartz capillary tubes possess an exceptionally high softening point (above 1600°C) and an extremely low coefficient of thermal expansion, granting superior thermal shock resistance. They are highly inert to acids and solvents, except hydrofluoric and hot phosphoric acid.

Yes, custom fabrication supports round, square, rectangular, D-shaped, dual-bore, and multi-bore capillary tubes tailored to precise engineering specifications, cut to custom lengths with fire-polished or precision-cleaved end finishes.