Photonic Generation of Millimeter-Wave Signals With Tunable Phase Shift

Photonic Generation of Millimeter-Wave Signals With Tunable Phase Shift

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A novel photonic approach Protein Snacks to generating a frequency-quadrupled millimeter-wave (mm-wave) signal with a tunable phase shift is proposed and demonstrated.Two second-order optical sidebands are generated by using a Mach-Zehnder modulator (MZM) that is biased at the maximum transmission point and an optical notch filter.A polarization-maintaining fiber Bragg grating (PM-FBG) is then utilized to make the two sidebands orthogonally polarized, which are then sent to a polarization modulator (PolM).By aligning the two orthogonally polarized sidebands with the two principal axes of Outdoor Dining Room Set the PolM, complementary phase modulation is thus achieved.By beating the two phase-modulated sidebands at a photodetector, an mm-wave signal is generated and its phase is continuously tunable by tuning the bias voltage to the PolM.

An experiment is performed.An mm-wave signal with a frequency tunable from 36 to 52 GHz is generated and its phase is tunable over 360 ^° by tuning the bias voltage.