Gain improvement in L-band EDFA using unpumped EDF in a double pass system

Harun, Sulaiman Wadi and Tamchek, Nizam and Poopalan, Prabakaran and Ahmad, Harith (2003) Gain improvement in L-band EDFA using unpumped EDF in a double pass system. Microwave and Optical Technology Letters, 36 (3). pp. 154-156. ISSN 0895-2477, DOI

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A new gain improvement technique for L-band EDFA is presented. It uses an unpumped EDF in a double-pass configuration in order to effectively suppress and completely exploit the backward ASE. Compared to a conventional single-pass amplifier, the gain coefficient can be improved from 1.5 dB/mW to 3.1 dB/mW without much noise figure penalty. The L-band EDFA can also reduce the pump power necessary to achieve a specified gain by about half, however, this occurs at the cost of noise figure increasing by 1.6 dB. The optimum length for an unpumped EDF is experimentally measured to be 3 m for both single-pass and double-pass systems. The maximum gain improvement of 15.5 dB was observed at a signal wavelength of 1572 nm while signal and pump powers were fixed at - 30 dBm and 103 mW, respectively.

Item Type: Article
Uncontrolled Keywords: Backward ASE; Double-pass EDFA; Erbium-doped fibre; L-band EDFA; Optical amplifier
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 06:12
Last Modified: 11 Oct 2018 06:12

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