Open AccessReconfigurable microwave signal processor with a phase shift of π
Author(s) -
Hao Sun,
Xinyi Zhu,
Wei Li,
Na Zhu,
Ming Li
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.010358
Subject(s) - optics , bandwidth (computing) , microwave , signal processing , computer science , differential phase , optical communications repeater , physics , phase (matter) , optical amplifier , telecommunications , optical modulation amplitude , laser , radar , quantum mechanics
We propose and experimentally demonstrate a reconfigurable microwave signal processor, with a bandwidth up to tens of gigahertz. In this technique, any microwave signal processing function with a phase shift of π could be performed by shaping the input optical intensity spectrum. The phase shift of π is implemented by using a differential detection. Thanks to the broad bandwidth provided by the incoherent optical source and the high resolution of the user-defined optical filter, the frequency response of our approach could be in a great agreement with that of an ideal signal processing function. In the experiment, temporal intensity Hilbert transformations and temporal intensity differentiations of Gaussian-like pulses with widths of 125ps, 85ps and 68ps are accurately achieved.