Gain clamping in double-pass L-band EDFA using a broadband FBG

Harun, Sulaiman Wadi and Ahmad, Harith (2004) Gain clamping in double-pass L-band EDFA using a broadband FBG. Pramana, 62 (4). pp. 893-897. ISSN 0304-4289, DOI

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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.

Item Type: Article
Uncontrolled Keywords: Double-pass EDFA; Gain clamping; L-band EDFA; Optical amplifier; Two-stage EDFA
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 11 Oct 2018 08:23
Last Modified: 11 Oct 2018 08:23

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