Open AccessAmplitude independent instantaneous frequency measurement using all optical technique
Author(s) -
Lam Anh Bui,
Arnan Mitchell
Publication year - 2013
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.21.029601
Subject(s) - optics , amplitude , signal (programming language) , optical fiber , radio frequency , photonics , frequency multiplier , physics , frequency modulation , telecommunications , optoelectronics , computer science , cmos , programming language
A novel all-optical system which independently measures both the amplitude and frequency of an RF signal is proposed and demonstrated. A photonic Hilbert transformer provides two orthogonal measurements of an RF signal. These are compared using four wave mixing in a highly nonlinear fiber, producing two independent outputs enabling determination of both signal frequency and amplitude. This all optical approach requires only simple, low cost DC electronics at the receiver. The system is demonstrated up to 20 GHz but can be scaled to 40 GHz and beyond.