新型掺铋光纤宽带发光及放大特性研究

发布时间：2018-05-13 09:36

本文选题：掺铋光纤 + 自发辐射谱　；参考：《北京邮电大学》2015年硕士论文

【摘要】：随着数据流量的高速增长,人们对光纤通信网的传输容量要求越来越高。目前掺铒光纤放大器的工作波长仅仅覆盖了C和L波段(1535-1625nm),依然有大部分光纤通信窗口低损耗波段没有被充分利用。覆盖全光通信窗口的宽带光纤放大器将是未来高速通信系统的一个关键器件。掺铋光纤具有超宽带近红外光辐射特性,可用于制作宽带光源、宽带光纤放大器和宽带可调谐激光器。本文对掺铋光纤的宽带发光及放大特性进行了研究。主要工作内容包括： (1)研究光的受激辐射光放大理论,推导出关于铋的速率方程组和功率传输方程组。建立铋相关单发光中心的放大模型。 (2)实验测量三种不同组份掺杂的掺铋光纤放大自发辐射谱(Amplified spontaneous emission, ASE),并分析了不同组份的作用。采用830nm和980nm两种泵浦源激发掺铋光纤,通过分析前向和后向自发辐射谱,推测发光中心。通过双泵浦实验,对掺铋光纤的两个发光中心的独立性进行了验证。 (3)基于光放大理论和Giles模型,建立了适于数值求解的偏微分方程组。利用数值仿真方法研究了掺铋光纤放大器的基本参数：增益和噪声指数。研究了泵浦结构对信号增益的影响。数值模拟了不同铋离子浓度掺杂光纤的ASE谱。
[Abstract]:With the rapid growth of data flow, the transmission capacity of optical fiber communication network is becoming more and more demanding. At present, Erbium-doped fiber amplifiers only cover C and L bands 1535-1625nm, and most of the low loss bands of optical fiber communication windows are not fully utilized. Wideband fiber amplifier covering all optical communication windows will be a key component of high-speed communication system in the future. Bismuth doped fiber has the characteristics of ultra-wideband near infrared radiation and can be used to fabricate broadband light source, broadband fiber amplifier and broadband tunable laser. In this paper, the broadband luminescence and amplification characteristics of bismuth doped fiber are studied. The main tasks include: 1) the theory of stimulated radiation amplification of light is studied, and the rate equations and power transmission equations about bismuth are derived. The amplification model of bismuth related single luminescence center was established. The amplified spontaneous emission (ASE) spectra of three bismuth doped fiber doped with three different components were measured experimentally and the effects of different components were analyzed. Bismuth doped optical fibers were excited by 830nm and 980nm pump sources. The photoluminescence centers were estimated by analyzing the forward and backward spontaneous emission spectra. The independence of two luminous centers of bismuth doped fiber is verified by double pump experiment. 3) based on the optical amplification theory and Giles model, the partial differential equations which are suitable for numerical solution are established. The gain and noise index of bismuth doped fiber amplifier are studied by numerical simulation. The effect of pump structure on signal gain is studied. The ASE spectra of fiber doped with different bismuth ion concentrations were numerically simulated.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.11;TN722

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