Upconversion enhances blue emission.

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    • Abstract:
      Reports on the study by the Friedrich-Schiller University of Jena in Germany which demonstrated laser emission in the red and green out of praseodymium/ytterbium doped double-clad zirconium barium lanthanum aluminum sodium fluoride fibers using upconversion fiber lasers. Applications of upconversion fiber lasers; Definition of lasing by upconversion; Overview of the technique used in demonstrating laser emission in the blue emission.