Signal processing using spectrally phase encoded optical frequency combs

摘要

Methods, apparatus and systems for an optical system for data harvesting and pattern recognition. The system includes a mode locked laser for producing a comb of optical frequencies that is split into two identical combs, a wavelength division demultiplexer eparate the individual optical frequency components of one comb and modulates each optical frequency component with a different one of plural target objects. A second modulator modulates an input signal with the second comb and an optical splitter splits the modulated signal into plural optical frequency components each containing the input signal. An optical combiner simultaneously combines the components containing the real time signal with one of the components containing a target object to produce a temporally modulated interferogram, and a comparator simultaneously compares the two on a comb by comb basis using balanced differential detection to determine any of the plural target objects are found in the input signal.

主权项

1. An optical signal processing apparatus for data harvesting and pattern recognition on plural channels based on an input data signal comprising:
a mode locked laser for producing a comb of stabilized, coherent, phaselocked optical frequencies that are split into a first and a second identical optical frequency comb each said comb being generated on an approximately 10 GHz frequency grid; a wavelength division demultiplexer to separate individual optical frequency components of the first optical frequency comb; a first modulator for modulating each optical frequency component of the first optical frequency comb with a different one of plural target objects; a second modulator for modulating said input data signal with the second optical frequency comb; an optical splitter for splitting the modulated input data signal into plural optical frequency components each containing the input data signal; an optical combiner for simultaneously combining one of the plural optical frequency components containing a real time signal with one of the plural optical frequency components that contain one of the plural target object to produce a temporally modulated interferogram; and a comparator for simultaneously comparing the plural optical frequency components containing the real time signal with the plural optical frequency components containing the plural target objects from the optical combiner on a comb by comb basis using balanced differential detection to determine if one or more of the plural target objects are found in the input data signal, the apparatus performing simultaneous matched filtering on plural channels.