Related Experiment Video
Updated: Jan 2, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Generation of pure electrical quadrature amplitude modulation with photonic vector modulator
Juan L Corral1, Rakesh Sambaraju, Miguel A Piqueras
1Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Valencia, Spain. jlcorral@ntc.upv.es
Abstract:
A photonic vector modulator architecture for generating pure quadrature amplitude modulation (QAM) signals is presented. An electrical quadrature-modulated signal at microwave-millimeter-wave frequencies is generated from its corresponding baseband in-phase (I) and quadrature (Q) components. In the proposed scheme, no electrical devices apart from the electrical tone oscillator are needed in the generation process. In addition, the purity of the generated signal is increased, and the hardware requirements are reduced when compared with previously proposed architectures so a highly compact low-cost architecture can be implemented. A pure 1.25 Gbit/s 4-QAM signal has been experimentally generated at a 42 GHz carrier frequency.
Related Concept Videos
Generating Electromagnetic Radiations
Generation of Three-Phase Voltage
As the rotor...
Generator Voltage Control
Half wave rectifier
Power Factor Correction
Design Example: Capacitance Multiplier Circuit
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.

