B. A. Ahmada, b, A. W. Al-Alimia, b, A. F. Abasa, b, S. W. Harunc, and M. A. Mahdia, b
a Centre of Excellence for Wireless and Photonic Networks, Engineering and Technology Complex, Universiti Putra
Malaysia, 43400 UPM Serdang, Selangor, Malaysia
b Photonics and Fiber Optic Systems Laboratory, Department of Computer and Communication Systems Engineering,
Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
c Department of Electrical Engineering, Universiti of Malaya, 50603 Kuala Lumpur, Malaysia
e-mail: belalanwer@yahoo.com
Received December 8, 2011; in final form, December 14, 2011; published online April 3, 2012
Abstract—A double frequency spaced multiwavelength Brillouin–Erbium doped fiber laser (BEDFL) with fig-
ure-of-eight cavity have been successfully developed and tested. Double frequency spacing is achieved by using
a piece of 2 km of highly nonlinear fiber (HNLF) as a gain medium. Figure-of-eight configuration removes the
odd order Stokes signals via a four-port circulator. Fifteen Stokes channels are simultaneously generated with
a spacing of 0.154 nm that is around 20 GHz, when the Brillouin pump and 980 nm pump powers are fixed at
the optimized values of 6 dBm and 40 mW, respectively. Fourteen anti stoke channels are also obtained, which
are generated through four wave mixing (FWM) process in the laser cavity. The output is smooth triangular
comb. The BEFL can also be tuned from 1526.5 to 1567.5 nm.
10.1134/S1054660X12050027
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