title: A single source microwave photonic filter using a novel single-mode fiber to multimode fiber coupling technique.
abstract: 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.
authors.affiliation: Lightwave Communication Research Laboratory, Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: John
authors.initials: J
authors.lastname: Chang
authors.forename: Mable P
authors.initials: MP
authors.lastname: Fok
authors.forename: James
authors.initials: J
authors.lastname: Meister
authors.forename: Paul R
authors.initials: PR
authors.lastname: Prucnal