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We propose a novel correlation technique based on matched filtering using four wave mixing (FWM) in a length of highly nonlinear fiber (HNLF). A pump wavelength which is modulated by an input bit stream is mixed with wavelength channels to generate idler wavelengths which also carry the bit stream. The idler wavelengths are differentially delayed and summed at a photodetector to produce the required...
A novel method to incorporate an optical Hilbert transformer with an all-optical photonic instantaneous frequency measurement system is proposed and demonstrated. Two orthogonal measurements of an RF signal are obtained which enables determination of both signal frequency and power. This system produces DC outputs that simplify the receiver and reduce cost. The system is demonstrated between DC and...
A novel technique for instantaneous frequency measurement using all optical mixing with multiple simultaneous and parallel measurements is demonstrated. This technique requires no special selection of optical wavelengths and provides a systematic method to extend the systems to multiple measurements with only modest increment in component count.
A novel instantaneous frequency measurement using optical coherence and DC detection is presented. A proof of concept demonstration between DC and 40 GHz shows the ability of the proposed technique for broad bandwidth measurements.
We present an overview of our work in instantaneous frequency measurement systems employing optical mixing and DC detection which are capable of measuring both the frequency and power of an RF over ultrahigh bandwidths from DC to 40 GHz. We particularly focus on all optical systems employing four wave mixing in highly nonlinear fibers.
A Microwave photonic system which simultaneously implements multiple parallel IFMs within a single optical fiber is proposed and practically demonstrated. Three optical carriers of different wavelength are modulated by the same RF signal and then differentially delayed. All three carriers are then mixed in a highly nonlinear optical fiber. The mixing products are separated and the optical power of...
A Microwave photonic system which simultaneously implements multiple parallel IFMs within a single optical fiber is proposed and practically demonstrated. Three optical carriers of different wavelength are modulated by the same RF signal and then differentially delayed. All three carriers are then mixed in a highly nonlinear optical fiber. The mixing products are separated and the optical power of...
A novel instantaneous frequency measurement using all optical mixing is demonstrated. This system can provide a measurement of RF frequency while requiring no high speed electronic components and remoting all components of the measurement system to the receiver.
A novel and compact scheme to assign coefficient to a wavelength channel is presented. This scheme realises both positive and negative coefficients over the full range from -1 to 1. A proof of concept is demonstrated for RF frequencies ranging from 1 to 20 GHz. This scheme allows implementation of transversal filters with arbitrary responses.
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