Multi-Wavelength Brillouin Fiber Laser Generation
Using Dual-Pass Approach¹

R. Parvizi^a, *, N. M. Ali^b, S. W. Harun^{a, b}, S. D. Emami^{a, b}, and H. Ahmad^a

^a Photonics Laboratory, 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: parvizi1360@gmail.com

Received September 19, 2011; in final form, September 28, 2011; published online February 6, 2012

Abstract—A simple and compact multi-wavelength tunable Brillouin fiber laser (BFL) in conjunction with
dual-pass approach is proposed and experimentally compared with the output of a conventional single ring cav-
ity architecture. This BFL source is demonstrated using 10 km long non-zero dispersion shifted fiber (NZ-DSF)
as a Brillouin gain medium. By single ring cavity configuration, odd-order Brillouin Stokes lines appear in the
backward direction with the line spacing 0.16 nm (~20 GHz) between each two consecutive waves. However,
this single ring cavity in conjunction with dual-pass configuration is able to generate Brillouin Stokes lines with
0.08 nm spacing by providing bi-directional oscillations of Brillouin waves in both forward and backward
directions. With a Brillouin pump power of 15.3 dBm, approximately up to 17 Brillouin Stokes lines are gen-
erated which is tunable over 40 nm tuning range.

DOI: 10.1134/S1054660X12030152

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