掺铒光纤非均匀展宽引起的空间烧孔现象导致单波长激光并不能完全控制放大器增益,提出了一种新颖的自动增益控制掺铒光纤放大器的结构:即采用高双折射光纤布拉格光栅产生抽运光,其写制光栅的波峰对应的波长分别为1549.3 nm和1549.83 nm,波长间隔为0.53 nm。通过调整偏振控制器,就实现了单激光或双激光的增益控制。这种设计增益控制范围为40 nm(1530~1570 nm),当输入功率在-40~-15 dBm的动态范围内,双激光增益控制的掺铒光纤放大器的平均增益和噪声系数分别约为22.22 dB和8.69 dB,而它们的漂移分别被钳制在0.69 dB和1.51 dB。系统性能测试表明:双激光控制掺饵光纤放大器在稳定性方面比单激光有着明显的优势。 A new automatic gain control structure of Erbium-Doped Fiber Amplifier (FBG) is proposed, which is to use a high-birefringence fiber Bragg grating to generate pumping Light, the corresponding grating of the grating corresponding to the wavelength of 1549.3 nm and 1549.83 nm, the wavelength interval of 0.53 nm. By adjusting the polarization controller, to achieve a single laser or dual laser gain control. This design gain control range of 40 nm (1530 ~ 1570 nm), when the input power in the dynamic range of -40 ~ -15 dBm, dual-gain laser gain control of the average gain and noise figure of the erbium-doped fiber amplifier is about 22.22 dB and 8.69 dB, respectively, while their drift is clamped at 0.69 dB and 1.51 dB, respectively. System performance tests show that dual-laser-controlled erbium-doped fiber amplifiers have distinct advantages over single-laser in terms of stability.