Theoretical Analysis of Noise in Erbium Doped Fiber Amplifier

Alexander William Setiawan Putra, Minoru Yamada, Hiroyuki Tsuda, Sumiaty Ambran

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Characteristics of noise in erbium doped fiber amplifier (EDFA) are theoretically analyzed and experimentally verified. Four discreet energy models are used for erbium ion transition. Spatially varying photon number for traveling optical field was defined in a spatially divided segment with finite length, whose length is decided by property of the spontaneous emission. Quantitative evaluation of the Langevin noise sources becomes possible by this model. The amplified spontaneous emission was included in terms of discrete longitudinal mode, which is defined for whole length of the EDFA. It was found that the relative intensity noise (RIN) in the EDFA hardly changes with noise frequency in the region higher than several kHz. The phase noise in EDFA also hardly changes with the noise frequency. The frequency noise of the signal light in the EDFA increases proportional to squared value of the noise frequency. The amount of RIN and the phase noise decrease in higher input optical power. Good correspondence between theoretical and experimental results was obtained.

Original languageEnglish
Article number7953635
JournalIEEE Journal of Quantum Electronics
Issue number4
Publication statusPublished - 2017 Aug


  • Erbium doped fiber amplifier
  • frequency noise
  • intensity noise
  • optical amplifier
  • optical noise
  • phase noise

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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