Glass materials for capillaries Vitreous Silica / Borosilicate glass / Fluorine-doped silica glass / BK-7 Vitreous silica Borosilicate Glass Dimensional Accuracy of Capillaries Capillaries for fiber arrays PLC / AWG / Splitter / Silicon photonics / ICR / optical waveguide Fiber Arrays Issues of V-Groove Fiber Arrays Capillary-Type Fiber Arrays Integrated GRIN Lenses Silicon photonics/collimated beam/CWDM filters/ Multi-core fiber/VR glasses What is GRIN lenses What is integrated GRIN lenses Applications of integrated GRIN lenses