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    • Keywords


      Gain clamping; optical amplifier; L-band EDFA; two-stage EDFA; double-pass EDFA

    • Abstract


      A highly efficient gain-clamped L-band EDFA with improved noise figure characteristic is demonstrated by simply adding a broadband C-band FBG in double-pass system. The combination of the FBG and optical circulator has created laser in the cavity for gain clamping. By adjusting the power combination of pumps 1 and 2, the clamped gain level can be controlled. The amplifier gain is clamped at 28.1 dB from −40 to −25 dBm with a gain variation of less than 0.5 dB by setting the pumps 1 and 2 at 59.5 and 50.6 mW, respectively. The gain is also flat from 1574 nm to 1604 nm with a gain variation of less than 3 dB. The corresponding noise figure varies from 5.6 to 7.6 dB, which is 0.8 to 2.6 dB less than those of unclamped amplifier.

    • Author Affiliations


      Sulaiman Wadi Harun1 Harith Ahmad1

      1. Photonics Laboratory, Department of Physics, University of Malaya, Kuala Lumpur - 50603, Malaysia
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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