Brillouin
Erbium Fiber Laser with 50 nm Tuning Range1
J. F. Zhaoa, *, T. Q. Liaob, **, C. Zhanga, R. X. Zhanga, C. Y. Miaoa, and Z. R. Tongc
a School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China
b Ministry of Educational Key Laboratory of Intelligent Computing and Signal Processing,
Anhui University, Hefei 230039, China
c School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin, 300384, China
*e-mail: johnfar@163.com
**e-mail: tongqing7577@sina.com
Received March 28, 2012; in final form, May 2, 2012; published online August 1, 2012
Abstract—A 50 nm tuning range multiwavelength Brillouin–erbium fiber laser (MWBEFL) with double Bril-
louin frequency spacing is presented. Two separated gain blocks with symmetrical architecture, consisted by
erbium-doped fiber amplifiers (EDFAs) and Brillouin gain media, are used to generate double Brillouin fre-
quency spacing. The wider tuning range is realized by eliminating the self-lasing cavity modes existing in con-
ventional MWBEFLs because of the absence of the physical mirrors at the ends of the linear cavity. The Bril-
louin pump (BP) is preamplified by the EDFA before entering the single-mode fiber (SMF), which leads to the
reduction of threshold power and the generation enhancement of Brillouin Stokes (BS) signals. Four channels
with 0.176 nm spacing are achieved at 2 mW BP power and 280 mW 980 nm pump power which can be tuned
from 1525 to 1575 nm.
DOI: 10.1134/S1054660X12090174
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