Published/Posted: June 3, 2015
Authors: Pagán, V.R.; Murphy, T.E.
DOI: 10.1364/OL.40.002481Abstract: We describe and demonstrate an electro-optic technique to simultaneously downconvert and demodulate vector-modulated millimeter-wave signals. The system uses electro-optic phase modulation and optical filtering to perform harmonic downconversion of the RF signal to an intermediate frequency (IF) or to baseband. We demonstrate downconversion of RF signals between 7 and 70-GHz to IFs below 20-GHz. Furthermore, we show harmonic downconversion and vector demodulation of 2.5-Gb/s QPSK and 5-Gb/s 16-QAM signals at carrier frequencies of 40-GHz to baseband.
V. R. Pagán and T. E. Murphy, "Electro-optic millimeter-wave harmonic downconversion and vector demodulation using cascaded phase modulation and optical filtering", Opt. Lett. 40(11) 2481-2484 (2015)
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