Method and apparatus for analyzing the spectrum of radio-frequency signals using a fiber optic recirculation loopSubmitted by Admin on Tue, 10/14/2014 - 07:00
Patent Number: US8861567
Inventors: Li, Ming-chiang; Zhou, Weimin
Patent Principal Area: Sensors & Sensor Enhancements
Publish/ Grant Date: Tuesday, October 14, 2014
Abstract: An apparatus comprising a fiber optical loop for conducting a first and a second pulse having a corresponding first and second wavelength, a first splitter for separating the first and second light pulses in the optical loop into a first and second light path to introduce a predetermined time delay between the first and second light pulses, a coupler for tapping a replica of the pair of light pulses from the loop, an auto-correlation module, coupled to the coupler, for correlating the replica of the pair of light pulses with each other to produce a set of data points comprising a plurality of multiplied and correlated pair of pulses and a transform module, coupled to the auto-correlation module, for transforming the data points into a channelized frequency spectrum.