OFS Laboratories, Somerset, New Jersey 08873, USA.
Opt Lett. 2012 Feb 15;37(4):605-7. doi: 10.1364/OL.37.000605.
We demonstrate a single-frequency Brillouin distributed feedback laser (DFB). The DFB laser cavity was a 12.4 cm long fiber Bragg grating with a π-phase shift offset from the grating center. It exhibited a threshold of 30 mW and conversion efficiency from pump to Stokes wave as high as 27%. Higher-order Stokes waves were suppressed by more than 20 dB. The Stokes output of the laser could be obtained in either the forward or backward direction, simply by changing the orientation of the offset of the discrete phase shift with respect to the pump propagation direction. The DFB laser operated over a pump frequency range of 1.2 GHz, more than 60 times larger than the SBS gain bandwidth.
我们展示了一种单频布里渊分布式反馈激光器（DFB）。DFB 激光腔是一个 12.4 厘米长的光纤布拉格光栅，具有相对于光栅中心的π相移偏移。它的阈值为 30mW，从泵浦到斯托克斯波的转换效率高达 27%。高阶斯托克斯波被抑制超过 20dB。激光的斯托克斯输出可以从前向或后向获得，只需改变离散相移相对于泵浦传播方向的偏移的方向即可。DFB 激光器在 1.2GHz 的泵浦频率范围内工作，比 SBS 增益带宽大 60 多倍。
