76-GHz Millimeter-Wave Generation Using MZ LiNbO3Modulator with Drive Voltage of 7 Vp-pand 19 GHz Signal Input

We developed a Mach-Zhender (MZ) LiNbO
3
optical modulator, which has a half-wavelength voltage V
π
of 1.8 V, for millimeter-wave generation with a low drive voltage and a low input frequency. The MZ modulator can generate every other order of double-sidebands (DSBs) and maximize a desired DSB by controlling the drive voltage and the dc bias. In this study, we demonstrate 76 GHz millimeter-wave generation using 2
^nd
-order DSB at a drive voltage of 7 V
p-p
(3.1 V
π
) and an input signal frequency of 19 GHz. Moreover, we present 4×f
m
generation without any filters using a bandwidth limitation of a PD module.