项目名称: 啁啾光纤布里渊动态光栅的机理和特性研究
项目编号: No.61308004
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 无线电电子学、电信技术
项目作者: 张洪英
作者单位: 哈尔滨理工大学
项目金额: 25万元
中文摘要: 本项目针对微波光子学领域对于信号延时连续可调的需求,提出一种全新的基于光纤双折射梯度的啁啾布里渊动态光栅的思想,旨在为微波信号的全光处理提供一种参数灵活可控的新型延时光栅。项目以光纤受激布里渊散射技术为基础,主要研究内容包括:(1)对啁啾布里渊动态光栅的产生和演化过程进行理论建模和数值模拟,分析其产生机理、演化规律以及激发效率与泵浦参数之间的内在联系,优化泵浦条件;(2)通过有限元分析方法研究利用温度梯度在液体填充的高双折射光子晶体光纤中产生双折射梯度的方法,分析不同填充液体和选择性填充模式下光子晶体光纤的模场分布和双折射特性;(3)研究均匀激发光栅的条件,对不同状态下激发的啁啾布里渊动态光栅进行实验测量和特性对比分析。 本项目的研究将为微波光子学领域实现微波信号的全光处理提供一种全新的解决方案,对于实现光载射频信号的色散补偿、微波光子移相器和滤波器等具有重要的科学意义和应用价值。
中文关键词: 受激布里渊散射;布里渊动态光栅;高双折射光子晶体光纤;分布式传感;
英文摘要: To address the request for continuously adjustable delay of signals in the field of microwave photonics, a novel idea of chirped Brillouin dynamic grating based on fiber birefringence gradient is proposed, aiming at providing a new type of delaying grating that can be flexible controlled for all-optical processing of microwave signals. Based on the technique of stimulated Brillouin scattering, the main contents of the project are as follows: (1) The generation and evolution process of the chirped Brillouin dynamic grating will be theoretically modeled and numerically simulated, based on which the generation mechanism, evolution process and the relationship between grating excitation efficiency and parameters of the pump waves will be analyzed, and the pumping condition will be optimized. (2) The theory and method of achieving a birefringence gradient via a temperature gradient in a high- birefringence photonic crystal fiber filled with liquid will be investigated through finite element analysis, and the mode field distribution and birefringence characteristics of the photonic crystal fiber with different kinds of liquid or selective filling modes will be analyzed. (3) The condition for uniform excitation of gratings will be studied, and reflection spectrum of the chirped Brillouin dynamic grating at different fi
英文关键词: Stimulated Brillouin scattering;Brillouin dynamic grating;high birefringence photonic crystal fiber;distributed sensing;