Proton beam writing of Nd:GGG crystals as new waveguide laser sources |
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Authors: | Yao Yicun Dong Ningning Chen Feng Vanga Sudheer Kumar Bettiol Andrew Anthony |
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Affiliation: | School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China. |
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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. |
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