Dual-stage Er/Yb doped fiber amplifier for gain and noise figure enhancements

Harun, Sulaiman Wadi and Abdul-Rashid, Hairul Azhar and Muhd-Yassin, S.Z. and Abd-Rahman, Mohd Kamil and Tamjis, Mohamad Rom and Ahmad, Harith (2006) Dual-stage Er/Yb doped fiber amplifier for gain and noise figure enhancements. IEICE Electronics Express, 3 (23). pp. 517-521. ISSN 1349-2543, DOI https://doi.org/10.1587/elex.3.517.

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Official URL: http://dx.doi.org/10.1587/elex.3.517


Gain and noise figure enhancements in an Er/Yb doped fiber amplifier (EYDFA) are demonstrated using a dual-stage amplifier configuration. In comparison to a conventional single-stage amplifier, the gain in this amplifier is enhanced at all wavelengths between 1530 to 1560 nm for the input signal powers of -40 and 0 d'Bm. A maximum gain improvement of 7.3 dB is obtained at a small signal (-40 dBm) wavelength of 1534 nm. The noise figure of the design is also enhanced at all wavelengths between 1530 to 1560 nm with a maximum reduction of 3.0 dB obtained at the small signal wavelength (-40 dBm) of 1542 nm. The total pump power used in this design is fixed at 140 mW. This improvement of gain and noise characteristics is attributed to the efficient pump power distribution within the amplifier and also the addition of a midway optical isolator between the two amplifier stages. The isolator blocks the backward propagating ASE to increase the population inversion al the first stage and thus, enhances the amplifier gain and noise figure. These results show that the usage of a dual-stage configuration with a midway optical isolator is an invaluable consideration when constructing a practical EYDFA.

Item Type: Article
Uncontrolled Keywords: Er/Yb; EYDFA; 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: 17 Oct 2018 03:43
Last Modified: 17 Oct 2018 03:43
URI: http://eprints.um.edu.my/id/eprint/19676

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