Lasers Optical fibers 37 Fiber optics 28 Industrial applications 18 Erbium 13 Optical amplifiers 12 Design and construction 9 Fibers 9 Materials 9 Photonics 9 Graphene 8 Thulium 8 Optical communications 6 Research 6 Brillouin scattering 5 Optical properties 5 Absorption 4 Measurement 4 Nonlinear optics 4 Optical fiber detectors 4 Semiconductors 4 Structure 4 Ytterbium 4 Zinc oxide thin films 4 Absorption and adsorption 3 Carbon nanotubes 3 Etching 3 Lasers in engineering 3 Mode-locked lasers 3 Nanoparticles 3