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控制激光的弛豫振荡和空间烧孔现象的存在 ,对全光增益控制掺铒光纤放大器 (EDFA)的性能产生劣化影响。采用一种新颖简单的利用两对光纤光栅对形成谐振腔结构 ,实现双波长增益控制掺铒光纤放大器。由两个不同波长的激光共同承担增益控制的任务 ,降低了控制激光引起的空间烧孔现象和瞬态输出变化。在动态工作条件下 ,双波长激光增益控制掺铒光纤放大器显示出优越的特性 ,适用范围扩展为普通单波长增益控制掺铒光纤放大器的两倍 ,能够适应 0～ 43kHz的上下载频率。
Controlling the relaxation of the laser oscillation and the phenomenon of spatial hole burning have a detrimental effect on the performance of an all-optical gain-controlled erbium-doped fiber amplifier (EDFA). A novel and simple method using two pairs of FBG pairs to form a cavity structure and achieve dual-wavelength gain control of EDFA is proposed. The task of gain control is shared by two lasers of different wavelengths, reducing the space-burning hole phenomenon and transient output changes caused by the control laser. Under dynamic working conditions, the dual-wavelength laser gain control erbium-doped fiber amplifier shows superior characteristics, which is extended to double the gain of an ordinary single-wavelength gain-controlled erbium-doped fiber amplifier and can adapt to the up-and-down frequency of 0 to 43 kHz.