Fluoride Fiber Amplifiers Operating at 1.3μm

Fundamentals and status of development of PDFAs are described. An amplification mechanism model which expains PDFA perfromance is established. On the basis of the model efficient pump schemes are discussed in order to construct high performance amplifier modules. Performance of LD, Nd-YLF and MOPA-LD pumped PDFAs is presented. The gain efficiency of newly developed praseodymium-doped PbF2/InF3-doped fiber is described.