Differential modal gain reduction of L-band 5-spatial mode EDFA with depressed core structure

@article{Wada2016DifferentialMG,
  title={Differential modal gain reduction of L-band 5-spatial mode EDFA with depressed core structure},
  author={Masaki Wada and Taiji Sakamoto and Shinichi Aozasa and Takayoshi Mori and Takashi Yamamoto and Kazuhide Nakajima},
  journal={2016 Optical Fiber Communications Conference and Exhibition (OFC)},
  year={2016},
  pages={1-3}
}
We experimentally investigate an L-band 5-spatial-mode EDFA. A low differential modal gain of less than 3 dB and flat gain properties are achieved in the 1570-1600 nm range by optimizing a depressed core structure.