Optical communications Fiber optics 29 Optical amplifiers 20 Optical fibers 19 Equipment and supplies 9 Dissertations 7 Dissertations, Academic 7 Lasers 6 Design and construction 5 Photonics 5 Wavelength division multiplexing 5 Design and constructions 4 Materials 4 Optical wave guides 4 Code division multiple access 3 Computer simulation 3 Nonlinear optics 3 Optical properties 3 Resonators 3 Semiconductor doping 3 Data transmission systems 2 Free space optical interconnects 2 Integrated optics 2 Optical fiber detectors 2 Orthogonal frequency division multiplexing 2 Phase shift keying 2 Pulse-code modulation 2 Quantum communication 2 Rare earth lasers 2 Semiconductors 2