TY - JOUR AU - Pagán, Vincent R. AU - Murphy, Thomas E. TI - Electro-optic millimeter-wave harmonic downconversion and vector demodulation using cascaded phase modulation and optical filtering JO - Optics Letters J2 - Opt. Lett. VL - 40 IS - 11 SP - 2481 EP - 2484 PY - 2015 DO - 10.1364/OL.40.002481 AB - 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. LB - Pagan_OL_40_2481_2015 ER -