摘要
提出了一种采用高非线性光纤作为布里渊增益介质的双倍布里渊频移间隔的多波长布里渊光纤激光器（Mw—BEFL）。激光器利用两个环形器构成双倍频移结构，将奇数阶的斯托克斯信号隔离在腔内循环，仅有泵浦信号和偶数阶的斯托克斯信号能够耦合输出，实现了双倍布里渊频移的多波长输出。激光器腔内没有引人任何的有源增益介质对斯托克斯信号进行放大，消除了腔内自激模的影响。激光器的调谐范围由布里渊泵浦的工作波长和掺铒光纤放大器（EDFA）的增益带宽决定。实验中，在布里渊抽运功率为0dBm、EDFA的输出功率为20dBm的情况下，在1536～1605nm之间得到双频移间隔的多波长输出，调谐范围是69nm。
A simple technique for achieving tunable multi-wavelength Brillouin fiber laser （BFL） with double Brillouin frequency spacings is experimentally demonstrated, by utilizing a piece of 200 m-long highly nonlinear fiber as the Brillouin gain medium. Two three-port circulators are incorporated in the la- ser configuration to circulate the odd-order Brillouin Stokes in the cavity and couple out the initial Bril- louin pump and even-order Stokes, which provides the multi-wavelength output with double Brillouin fre- quency spacings. An advantage of this scheme is that it does not use any active gain medium in the cavity for amplification of Stokes signals, which realizes the wideband tunable laser by eliminating the influence of the self-lasing cavity modes. The turning range of the proposed laser totally depends on the working wavelength of the tunable laser and the gain profile of the erbium-doped fiber amplifier （EDFA）. At the Brillouin pump power of 0 dBm and the EDFA output power of 20 dBm, multi-wavelength with double Brillouin frequency spacings which can be tuned from 1 536nm to 1 605 nm can be achieved.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2013年第10期1868-1872,共5页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(61107052)资助项目
