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Praseodymium-Doped Fiber Amplifiers at 1.3m
Yasutake OHISHI Terutoshi KANAMORI Makoto SHIMIZU Makoto YAMADA Yukio TERUNUMA Jiro TEMMYO Masato WADA Shoichi SUDO
IEICE TRANSACTIONS on Communications
Publication Date: 1994/04/25
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on Fiber Amplifiers and Their Applications to Lightwave Communications)
fiber amplifier, rare earth, praseodymium, fluoride fiber,
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Fundamentals and development of PDFAs are described. Spectroscopic data of Pr3+ in a fluoride glass are presented with a view to understanding the performance of PDFA. An amplification mechanism model which explains PDFA performance is established. On the basis of the model pump schemes which efficiently extract the potential in Pr3+-doped fluoride fiber are discussed in order to construct amplifier modules. Gain characteristics of Pr3+-doped fluoride fibers are clarified. Codoping effect on pump wavelength extension is investigated. LD-pumped PDFA construction and performance are described. PDFAs are shown to be attractive device to upgrade the performance of optical systems at 1.3µm. Furthermore future approaches to PDFA research are discussed.