Gasulla Ivana, Capmany José
ITEAM Research Institute, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain.
Opt Express. 2011 Sep 26;19(20):19758-74. doi: 10.1364/OE.19.019758.
The concept of filtered Microwave Photonic Links is proposed in order to provide the most general and versatile description of complex analog photonic systems. We develop a field propagation model where a global optical filter, characterized by its optical transfer function, embraces all the intermediate optical components in a linear link. We assume a non-monochromatic light source characterized by an arbitrary spectral distribution which has a finite linewidth spectrum and consider both intensity modulation and phase modulation with balanced and single detection. Expressions leading to the computation of the main figures of merit concerning the link gain, noise and intermodulation distortion are provided which, to our knowledge, are not available in the literature. The usefulness of this derivation resides in the capability to directly provide performance criteria results for complex links just by substituting in the overall closed-form formulas the numerical or measured optical transfer function characterizing the link. This theory is presented thus as a potential tool for a wide range of relevant microwave photonic application cases which is extendable to multiport radio over fiber systems.
为了对复杂的模拟光子系统提供最通用和多功能的描述，提出了滤波微波光子链路的概念。我们开发了一种场传播模型，其中一个以其光学传递函数为特征的全局光学滤波器包含线性链路中的所有中间光学组件。我们假设一个非单色光源，其具有任意光谱分布，该分布具有有限的线宽光谱，并考虑强度调制和相位调制以及平衡检测和单检测。提供了用于计算与链路增益、噪声和互调失真相关的主要性能指标的表达式，据我们所知，这些表达式在文献中是没有的。这种推导的有用性在于能够通过在整体闭式公式中代入表征链路的数值或测量的光学传递函数，直接为复杂链路提供性能标准结果。因此，该理论被视为一种潜在工具，可用于广泛的相关微波光子应用案例，并且可扩展到多端口光纤无线电系统。
