Lasers and Laser Optics

Neodymium, erbium, and ytterbium co-doped fiber amplifier

[+] Author Affiliations
Itai Ron

Tel Aviv University, Engineering Faculty, Department of Electrical Engineering — Physical Electronics, Tel Aviv 69978 Israel

Amos A. Hardy

Tel Aviv University, Engineering Faculty, Department of Electrical Engineering — Physical Electronics, Tel Aviv 69978 Israel

Opt. Eng. 50(7), 074201 (July 06, 2011). doi:10.1117/1.3597638
History: Received February 11, 2011; Revised April 21, 2011; Accepted May 17, 2011; Published July 06, 2011; Online July 06, 2011
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A combination of erbium (Er), ytterbium (Yb), and neodymium (Nd), in fiber amplifiers, is examined. This combination extends the pumping wavelength spectrum by creating a new pumping path. Furthermore, the Nd addition enables pumping the amplifier from within the amplifier center, and thereby decreases the amplified spontaneous emission at the amplifier ends. A mathematical model is presented relating the excited population density, the signal power along the amplifier, the energy transfer among the ions, and the amplified spontaneous emissions. The study compares the amplifier characteristics of Er-Yb-Nd co-doped amplifier with a traditional Er-Yb amplifier for various combinations. The new configuration adds flexibility into the amplifier design. By properly selecting its parameters, one can increase the output signal power and decrease the amplified spontaneous emission, to comply with various requirements.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Itai Ron and Amos A. Hardy
"Neodymium, erbium, and ytterbium co-doped fiber amplifier", Opt. Eng. 50(7), 074201 (July 06, 2011). ; http://dx.doi.org/10.1117/1.3597638


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