Gain-clamping in two-stage L-band EDFA using an unwanted backward ase from second stage

Harun, Sulaiman Wadi and Ahmad, Harith (2003) Gain-clamping in two-stage L-band EDFA using an unwanted backward ase from second stage. Optics & Laser Technology, 35 (6). pp. 441-444. ISSN 0030-3992

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Official URL: http://dx.doi.org/10.1016/S0030-3992(03)00049-5

Abstract

A gain clamping technique for the long wavelength band erbium-doped fiber amplifier (L-band EDFA) is presented. It uses two circulators and a broad band fiber Bragg grating to route wasted backward C-band ASE from the second stage and launch it back into the input end of the first stage of a two-stage amplifier. The two-stage L-band EDFA has shown a small signal gain improvement of 5.7 dB compared to a single-stage amplifier with a slight noise figure degradation. By utilizing the wasted backward ASE, a L-band gain-clamped EDFA with high gain can be realized. Compared to the unclamped case, this gain-clamping technique is effective in reducing the total gain variation as small as 0.3 dB.

Item Type: Article
Uncontrolled Keywords: Gain clamping; Optical amplifier; L-band EDFA; Two-stage EDFA; Amplified spontaneous emission
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 > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 11 Oct 2018 08:07
Last Modified: 11 Oct 2018 08:07
URI: http://eprints.um.edu.my/id/eprint/19641

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