Fiber optic sensors Optical fiber fabrication 3 Plastic optical fibers 3 Waveguides 3 Asymmetric couplers 2 Cnc machining 2 Fibers 2 Optical access 2 Optical fibers 2 Plastic optical fiber (POF) 2 3 db couplers 1 Codes (symbols) 1 Coupling ratios 1 Device modeling 1 Device structures 1 Die casting inserts 1 Equipment 1 Excess loss 1 Fabricated device 1 Fabrication 1 High-index contrast waveguides 1 Insertion losses 1 Lateral displacements 1 Linear characteristics 1 Machining 1 Machining techniques 1 Molds 1 Numerical analysis 1 Optical codes 1 Optical fiber coupler 1