Apparatus comprising an optical gain device, and method of producing the device
Jacobson, Dale C
Kistler, Rodney C
Poate, John M
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Citation (published version)Greg Blonder, Dale C Jacobson, Rodney C Kistler, John M Poate, Albert Polman. "Apparatus comprising an optical gain device, and method of producing the device." U.S. Patent 5,039,190-A.
Disclosed is apparatus comprising an optically pumped optical gain device that comprises a rare earth (RE)-doped planar waveguide with non-uniform dopant distribution in the core of the waveguide. The RE ions are advantageously distributed such that the ions are concentrated in a core region in which the mode intensity of both signal radiation and pump radiation is relatively high. In preferred embodiments of a single mode planar waveguide according to the invention the RE ions are substantially concentrated in the central core region. A method of making the disclosed apparatus is also disclosed. The method involves implantation of RE ions into the core region.