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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 4, Iss. 1 — Mar. 30, 2000
  • pp: 14–18

Option of EDFAs for WDM Long-Haul Transmission Systems Gain Flattening With or Without a Gain Equalizer

Hee-Sang Chung, Hyun-Beom Choi, Mun-Seob Lee, Dong-Han Lee, Seong-Joon Ahn, Bong-Su Choi, Hyung-Myung Moon, and Kyu-Haeng Lee  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 4, Issue 1, pp. 14-18 (2000)


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Abstract

We have investigated gain flattening of EDFA systems with or without a gain equalizer for WDM long-haul transmission using a re-circulating EDFA loop. Without a gain equalizer, gain variation as small as 2.9 dB was achieved over the 10-nm band of a 100 cascaded EDFA system by the inversion principle. With a gain equalizer based on all-fiber acousto-optic tunable filters, two different config-urations of EDFAs were tested. For a single-stage EDFA scheme, the 21-nm band has shown 3.8 dB of gain variation at 17.4 ∼ 20.3 dB of OSNRs after the 100the stage of EDFAs. For a dual-stage EDFA scheme, a wider bandwidth of 34 nm has shown 3.6-dB variation after 40 cascaded EDFAs.

© 2000 Optical Society of Korea

History
Original Manuscript: October 30, 1999
Published: March 1, 2000

Citation
Hee-Sang Chung, Hyun-Beom Choi, Mun-Seob Lee, Dong-Han Lee, Seong-Joon Ahn, Bong-Su Choi, Hyung-Myung Moon, and Kyu-Haeng Lee, "Option of EDFAs for WDM Long-Haul Transmission Systems Gain Flattening With or Without a Gain Equalizer," J. Opt. Soc. Korea 4, 14-18 (2000)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-4-1-14


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