Enhancement of Brillouin Stokes Generation in the S-Band
Region Using a Combination S-Band Depressed Cladding
Erbium
Doped Fiber and Semiconductor Optical Amplifier
1

H. Ahmada, *, M. Z. Zulkiflia, N. A. Hassana, and S. W. Harunb

a Photonics Research Center, Department of Physics, University of Malaya,
50603 Kuala Lumpur, Malaysia

b Department of Electrical Engineering, Faculty of Engineering, University of Malaya,
50603 Kuala Lumpur, Malaysia

*e-mail: harith@um.edu.my

Received October 3, 2011; in final form, October 15, 2011; published online February 6, 2012

Abstract—A hybrid Depressed-Cladding Erbium Doped Fiber (DC-EDF) together with a broadband Semicon-
ductor Optical Amplifier (SOA) to enhance the generation of Stokes and anti-Stokes in a 7.7 km long Dispersion
Compensating Fiber (DCF) is proposed and demonstrated. The performance of the proposed system is com-
pared against that of a conventional system with only the DC-EDF as the gain medium, and the incorporation
of the SOA can be seen to enhance the generation of Brillouin Stokes significantly. The proposed system is able
to generate an output comb with a flat-top and more than 29 Stokes and 13 anti-Stokes lines, an increase of 14
and 8 lines respectively over the conventional system and covering the entire S-band region. The output comb
generated is highly stable over time.

10.1134/S1054660X12030012


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