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We have demonstrated ytterbium-doped fiber lasers in 50µm-core photonic bandgap fibers with robust single mode output, a record core diameter for active photonic bandgap fibers, with slope efficiency exceeding 70%.
We present a comprehensive study of the physics and design of OPCPA based on chirped quasi-phase-matching, identifying subtle parametric processes occurring in these devices, and how they were addressed in our latest mid-IR OPCPA result.
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