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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 7,
  • Issue 2,
  • pp. 64-66
  • (2003)

Double-Pass Two-Stage EDFA with Gain-Flattening Filters

Open Access Open Access

Abstract

The optical gain and noise figure improved double-pass two-stage EDFA using a mirror, circulator, and gain-flattening filters is proposed. By double passing the pump light and removing the ASE propagating into the input part, the signal gain of 5 ㏈ and noise figure of 2.1 ㏈ are improved compared to the conventional single- and double-pass EDFA With gain-fattening filters in the second stage of EDFA, we obtain an improved flat gain with a gain flatness less than 1 ㏈ over 33-nm wavelength range at the 980-nm pump power of 86 ㎽.

© 2003 Optical Society of Korea

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