Optical Under-Sampling and Reconstruction of Several Bandwidth-Limited Signals |
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Authors: | Feldster A Shapira YP Horowitz M Rosenthal A Zach S Singer L |
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Affiliation: | Dept. of Electr. Eng., Technion - Israel Inst. of Technol., Haifa; |
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Abstract: | We demonstrate experimentally an optical system for under-sampling several bandwidth-limited signals with carrier frequencies that are not known apriori and can be located anywhere within a very broad frequency region between 0-18 GHz. The system is based on under-sampling asynchronously at three different sampling rates. The optical pulses required for the under-sampling are generated by a combination of an electrical comb generator and an electro-absorption optical modulator. To reduce loss and improve performance the implementation of the optical system is based on a wavelength division multiplexing technique. An accurate reconstruction of both the phase and the amplitude was obtained when two chirped signals each with a bandwidth of about 150 MHz were sampled. |
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