Chang John, Fok Mable P, Meister James, Prucnal Paul R
Lightwave Communication Research Laboratory, Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Opt Express. 2013 Mar 11;21(5):5585-93. doi: 10.1364/OE.21.005585.
In this paper we present a fully tunable and reconfigurable single-laser multi-tap microwave photonic FIR filter that utilizes a special SM-to-MM combiner to sum the taps. The filter requires only a single laser source for all the taps and a passive component, a SM-to-MM combiner, for incoherent summing of signal. The SM-to-MM combiner does not produce optical interference during signal merging and is phase-insensitive. We experimentally demonstrate an eight-tap filter with both positive and negative programmable coefficients with excellent correspondence between predicted and measured values. The magnitude response shows a clean and accurate function across the entire bandwidth, and proves successful operation of the FIR filter using a SM-to-MM combiner.
在本文中，我们展示了一种完全可调谐且可重构的单激光器多抽头微波光子FIR滤波器，该滤波器利用一种特殊的单模到多模合路器来对抽头进行求和。该滤波器所有抽头仅需一个激光源，以及一个用于信号非相干求和的无源组件——单模到多模合路器。单模到多模合路器在信号合并期间不会产生光干涉，并且对相位不敏感。我们通过实验演示了一个具有正负可编程系数的八抽头滤波器，预测值与测量值之间具有出色的一致性。幅度响应在整个带宽上呈现出清晰准确的函数关系，并证明了使用单模到多模合路器的FIR滤波器的成功运行。
