Adhesives for Fiber Device Assembly Fiber couplers, lasers, WDMs, optical switches, collimators, PLC devices, fiber arrays, etc. Adhesives for Laser Devices A selection of adhesives used in laser packaging, for reference only. Recoating of Double-Clad Fiber Lasers Medium-viscosity, low-refractive-index UV optical adhesive. Medical-Grade Adhesives, USP Class VI Made from biocompatible ingredients to meet pharmaceutical sanitary requirements.