基于光子晶体光纤的拉曼放大器特性研究

Numerical analysis of Raman amplifier based on triangular photonic crystal fiber

研究了基于光子晶体光纤拉曼放大器的特性。在后向多抽运的情况下,利用不同的几何尺寸与掺锗浓度,全面研究了拉曼净增益、信号双重瑞利后向散射光信噪比及放大自发辐射光信噪比,并进行了模拟分析。计算、比较了该类放大器与基于单模光纤的拉曼放大器的性能。结果表明,在合理选择光纤几何尺寸与掺锗浓度的基础上,光子晶体光纤拉曼放大器具有更好的放大特性。

A numerical design on the triangular PCF-based backward multi-pump Raman amplifier was presented. It is demonstrated that high flat Raman gain can be reached based on PCE Influences of different geometric parameters and germanium concentrations on the Raman net gain, amplified spontaneous emission （ASE） noise and double Rayleigh backscattering （DRBS） of the signal have been analyzed. Meantime, comparison with multi-pump gain-flat Raman amplifiers based on standard single mode fiber was also carded out. The results showed that PCF is an appropriate candidate for high gains Raman amplifiers. The results also indicate that for optimizing crystal fiber Raman amplifier, there is tradeoff between the geometric parameter and germanium-doped concentration of triangular PCF.