Millimeter-wave signal properties resulting from electrooptical upconversion

This paper describes the combined effects of laser chirp, electrooptical mi xing, dispersive fiber transmission, and photodetection on the nonlinear si gnal properties of the electrooptically generated millimeter-wave signal (6 0 GHz). Analytical expressions describing the complex currents of fundament al and higher order products are provided for the case of single-tone modul ation as well as for two-tone modulation, respectively. Examples will be co nsidered including the nonlinear amplitude response (output power at millim eter-wave range versus input power at IF), the nonlinear phase response (re lative output phase at millimeter-wave range versus input power at IF), the input related 1-dB gain compression condition, the amplitude response of t hird- and fifth-order intermodulation products, as well as the input relate d intercept points for the latter signals. The model developed performed we ll, even under moderate to large signal conditions, and very good agreement has been achieved between theory and experiment.