Enhancement of power conversion efficiency for an L-band EDFA with a secondary pumping effect in the unpumped EDF section

@article{Lee1999EnhancementOP,
  title={Enhancement of power conversion efficiency for an L-band EDFA with a secondary pumping effect in the unpumped EDF section},
  author={Juhan Lee and Uh-Chan Ryu and Seong Joon Ahn and Namkyoo Park},
  journal={IEEE Photonics Technology Letters},
  year={1999},
  volume={11},
  pages={42-44}
}
A novel structure, which utilizes detrimental backward amplified spontaneous emission as a secondary pump source is suggested for a silica-based fiber amplifier, operating at a wavelength range from 1570 to 1610 nm. By using the secondary pumping effect from the strong, wasted 1550-nm band amplified spontaneous emission power in the unpumped section of the erbium-doped fiber, it was possible to achieve a considerable improvement in power conversion efficiency, increasing small-signal gain by… CONTINUE READING
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