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http://dx.doi.org/10.3807/JOSK.2003.7.2.064

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

Sohn, Ik-Bu (Department of Electronic Engineering, Kyungpook National University)
Baek, Jang-Gi (Department of Electronic Engineering, Kyungpook National University)
Song, Jae-Won (Department of Electronic Engineering, Kyungpook National University)
Publication Information
Journal of the Optical Society of Korea / v.7, no.2, 2003 , pp. 64-66 More about this Journal
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 ㎽.
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