基于掺铒光纤放大自发辐射的宽带光源优化研究

Research of Optimized Wide-bandwidth Optical Source with Er3+-doped Fiber Amplified Spontaneous Emission

摘要:

提出并设计了一种双向泵浦、双程结构的掺铒光纤放大自发辐射宽带光源。对该光源的实现方案和优化效果进行了实验研究,并分析了该光源的输出功率转化效率、光谱平坦度以及工作稳定性。结果表明,和前向泵浦ASE输出相比,该结构所产生的宽带光源泵浦转化效率提高8.24%,在不加任何滤波器条件下1525~1557nm之间光谱平坦度提升1dB,3dB线宽增加24.56nm。实现了1h内光功率和光谱的稳定输出,可为光纤传感、光谱分析等领域提供光源。

Abstract:

A kind of wide-bandwidth optical source applying amplified spontaneous emission of Er³⁺-doped optical fiber is proposed, with bi-directional pumping and double-pass configuration. Experiments were performed to verify the proposed scheme, and then the output performance was optimized. The pump efficiency, spectrum flatness and stability were analyzed in detail. The experimental results show that the pump conversion efficiency is increased by 8.24%, the flatness of optical spectrum is improved by 1dB in 1525~1557nm without any filter,and the output linewidth @3dB is widened by 24.56nm. The stable output of optical power and spectrum within one hour is realized, which can provide light source for optical fiber sensing, spectral analysis, etc.