High Power Er3+-Doped Fiber Amplifier Pumped by 1.48 µm Laser Diodes

Kazunori Suzuki, Yasuo Kimura, Masataka Nakazawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


An output power of 51 mW at a wavelength of 1.552 µm is obtained for the first time from an inGaAsP laser diode pumped Er3+-doped fiber amplifier. The pump power is 107 mW and the amplifier efficiency reaches 48%. The Er3+doping concentration is 630 ppm, and the fiber length is 20 m. The pump source is four inGaAsP laser diodes, which are operating at 1.45∼1.49 µm and are multiplexed using their polarizations and wavelengths. With simultaneous backward and forward pumping, the out put power is increased to 72 mW at a total pump power of 193 mW.

Original languageEnglish
Pages (from-to)L2067-L2069
JournalJapanese Journal of Applied Physics
Issue number11
Publication statusPublished - 1990 Nov


  • Er-doped fiber
  • Laser diode pumping
  • Optical amplifier


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