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Proton beam writing of Nd:GGG crystals as new waveguide laser sources

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Abstract

Focused proton beam writing has been utilized to fabricate optical channel waveguides in Nd:GGG crystals. The 1MeV 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 1063.7nm, with absorbed pump power of 61mW (at 808nm). 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.

© 2011 Optical Society of America

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