铒镱共掺光波导放大器增益特性模拟和性能优化

Simulation of Gain Characteristics of Erbium Ytterbium Adulterates Fiber Waveguide Amplifier and Functional Optimization

在分析铒镱共掺系统的能级结构和相关跃迁的基础上,根据速率方程和传输方程,建立了EY-CDWA的增益模型,给出了EY-CDWA的增益公式,对增益特性进行了模拟,并对影响放大器增益的波导长度及泵浦功率等相关条件进行了优化。模拟计算中建立了参数优化方案,实现了放大器泵浦波长、泵浦功率和增益的同步优化,得到最佳长度下的最大增益,该理论模型应用于实际制作的Yb-Er共掺Al2O3光波导放大器,结果与实验数据相符。

Optical integration is the development trend of modem optical communication technologies. Waveguide amplifier is a new type of integrated optical devices, after the semiconductor laser amplifiers and the erbium-doped fiber amplifiers. The use of rareearth element ytterbium due to some salient features of the assensitized elements can improve the performance of the erbiumdoped waveguide amplifier. EY-CDWA, due to its high gain per unit length and the easiness to be integrated, can very easily be integrated with any device. Optical integration paves a way for a wide range of active components. Therefore, EY-CDWA is being paid more and more attention. This paper analyzes the impact of various factors on the gain of amplifiers and how to improve the amplifiers. The analysis of co-doped Yb-doped structure in the system-level forms the basis of the relevant transition by solving the rate equation and the amplifier transfer equation. A gain model is built for EY-CDWA with related formula for the gain. Gain characteristics are simulated. The waveguide length, pump power and other related conditions are optimized with respect to the amplifier gain. With a parameter optimization program, the amplifier pump wavelength, pump power and gain are optimized at the same time, with the maximum gain in the best length. The theoretical model can be applied to the actual production of the Yb-Er codoped A1203 optical waveguide amplifier, with a good agreement with the experimental data. Analysis of the impact of various factors on the gain of amplifier improves the methods and helps to develop a more reasonable parameter optimization program.