MULTIMODE WAVE GUIDE CONFIGURED TO GENERATE SINGLE-MODE RADIATION FROM SINGLE-MODE RADIATION

摘要

- Multimode waveguide configured to generate single-mode radiation from single-mode radiation - The waveguide (1) has an index profile comprising at least a maximum, the maximum (s) of the index profile corresponding respectively to at least a maximum intensity of the output radiation (11) at a desired order mode, the waveguide (1) also having at least one dopant ion configured to absorb the pump radiation (31 ), the doping ion (s) exhibiting a dopant ion concentration profile comprising at least a maximum.