In order to control the 1~2-um protrusion height of mutilcore (MT) fiber endface in optic connectors, a micro grinding approach was developed using a 3D flock-structured film. The objective is to replace traditional lapping with loose-abrasive slurry. Fiber couplers are also used for fiber-to-fiber coupling: Light from the first fiber is collimated with a fiber collimator and then focused into the second fiber by another collimator. The document is intended to inform and educate about polishing processes and commercial automated polishing equipment with various fixturing in order. ptical fiber is a good vehicle O for high-speed data trans-mission as long as light trans-mission is efficient — even across connector assemblies. Increasingly, with the adop-tion of newer fiber configura-tions, as.