Optical communications Fiber optics 431 Optical fibers 73 Wavelength division multiplexing 68 Optical amplifiers 65 Wireless communication systems 63 Equipment and supplies 54 Computer networks 50 Data transmission systems 43 Design and construction 40 Optoelectronic devices 36 Telecommunication 31 Multiplexing 28 Optical wave guides 25 Code division multiple access 22 Optical detectors 22 Telecommunication systems 21 Optoelectronics 20 Radio frequency modulation 20 Photonics 19 Switching systems 19 Mathematics 18 Signal processing 18 Free space optical interconnects 17 Integrated optics 17 Integrated circuits 16 Laser communication systems 12 Digital communications 11 Light 11 Optical fiber communication 11