中国激光, 2012, 39 (10): 1002004, 网络出版: 2012-09-10
高功率脉冲Er-Yb共掺光纤放大器中放大自发辐射的抑制方法
Suppressing Amplified Spontaneous Emission in High-Power Pulsed Er-Yb Codoped Fiber Amplifiers
激光光学 光纤放大器 有限差分法 铒镱共掺 Yb波段辅助信号 laser optics fiber amplifier finite difference method Er-Yb codoped Yb-band aided signal
摘要
为了研究放大的自发辐射(ASE)对高功率脉冲Er-Yb共掺光纤放大器(EYDFA)的影响，采用数值模拟对EYDFA中不同参数信号的放大进行了研究。结果表明，Yb波段(1.0~1.1 μm)ASE是制约放大器输出功率提升的主要因素。因此，有效地抑制Yb波段ASE 将有助于放大器性能的提高。通过进一步研究发现，在放大器的抽运端引入一个Yb波段的辅助信号能有效地抑制Yb波段ASE，从而提高抽运转换效率，提升放大器的输出功率。
Abstract
In order to investigate the impact of the amplified spontaneous emission (ASE) on the performance of high-power pulsed Er-Yb codoped fiber amplifiers (EYDFAs), several EYDFAs with different input signal parameters are studied numerically. The results show that the Yb-band (1.0~1.1 μm) ASE is the main factor that limits the efficiency of a high-power pumped EYDFA. Therefore, suppressing the Yb-band ASE can effectively help to improve the performance of the amplifiers. It is found that adding an Yb-band signal at the pump end can help to reduce the Yb-band ASE effectively. Simultaneously, this method can also enhance the power conversion efficiency and improve the output power of the amplifiers.
何洋, 韩群, 宁继平, 盛朝霞, 任坤. 高功率脉冲Er-Yb共掺光纤放大器中放大自发辐射的抑制方法[J]. 中国激光, 2012, 39(10): 1002004. He Yang, Han Qun, Ning Jiping, Sheng Zhaoxia, Ren Kun. Suppressing Amplified Spontaneous Emission in High-Power Pulsed Er-Yb Codoped Fiber Amplifiers[J]. Chinese Journal of Lasers, 2012, 39(10): 1002004.
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