Optical fiber communication Fiber optics 5 Optical fibers 4 Orthogonal frequency division multiplexing 3 Data transmission systems 2 Laser communication systems 2 Nonlinear optics 2 Optical fiber detectors 2 Optical wave guides 2 Wavelength division multiplexing 2 Bragg gratings 1 Crystal whiskers 1 Digital communications 1 Eavesdropping 1 Electronic noise 1 Erbium 1 Joints 1 Lasers 1 Materials 1 Multiplexing 1 Optical amplifiers 1 Optical communications 1 Optical properties 1 Photonic crystals 1 Photonics 1 Polarization (Light) 1 Quantum optics 1 Semiconductors 1 Single-mode optical fibers 1 Structure 1