title: Proton beam writing of Nd:GGG crystals as new waveguide laser sources.
abstract: Focused proton beam writing has been utilized to fabricate optical channel waveguides in Nd:GGG crystals. The 1 MeV proton beam irradiation creates a local modified region with positive refractive index changes at the end of the proton trajectory, in which the channel waveguide could confine the light field in a symmetric way. Room-temperature laser emission has been achieved at 1063.7 nm, with absorbed pump power of 61 mW (at 808 nm). The obtained slope efficiency of the Nd:GGG waveguide laser system is as high as 66%, which is, to our best knowledge, the highest value for integrated lasers from ion beam processed channel waveguide systems.
authors: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
authors: Yicun
authors: Y
authors: Yao
authors: Ningning
authors: N
authors: Dong
authors: Feng
authors: F
authors: Chen
authors: Sudheer Kumar
authors: SK
authors: Vanga
authors: Andrew Anthony
authors: AA
authors: Bettiol